Publicity
Our Visitors
CONTACTS
African Drylands Institute for Sustainability
College of Agriculture and Veterinary Science
University of Nairobi
P.O. Box 29053 00625
Nairobi , Kenya
Email:adis@uonbi.ac.ke /csdes@uonbi.ac.ke
Tel: 254-020-2133086
Fax: 254-020-632121
ADIS Participates in the 2018 Kenya Pastoral Week hosted by Kajiado County
UoN Open Day
Kibwezi tree Planting- Mr. Katuva
Kibwezi rangeland reseeding
2nd Annual Rangeland Congress 2016
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The National level paper presentation seminar on Early warning and food security forum
Pasture Week in Marsabit County
The pasture week aimed to inaugurate pasture production demonstrations- land preparation and broadcasting of the grass seeds
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Fodder Production Training
Farmers learning to construct a semi-circular band, a micro-structure for rainwater harvesting and conservation in Wajir County
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Climate Change Adaptation Workshop
National Dialogue on Policy Frameworks for Climate Change Adaptation, Disaster Risk Reduction, and Rangeland Management and Governance in Kenya’s Rangelands
Read more...
CSDES LAUNCHES THE GEOGRAPHIC INFORMATION SYSTEMS (GIS) LAB AT CAVS, UoN.
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Publications
BY YEAR | BY AUTHOR | BY TITLE | BY COLLEGE/FACULTY/DEPARTMENT
| Prof. Mbeche Oyuko O. Publications | ||||
| 1 | 9999 | Mbeche, O. O., "The Hydraulic Ram Pump In Kenya", ZDRC-MRl02e, Proceedings Of A Workshop On Hydraulic Ram Pump (hydrant) Technology, Arusha, Tanzania, May 1984. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 2 | 9999 | Mbeche, O. O., "Energy Use In Kenya", Proceedings: International Workshop On Energy Survey Methodologies For Developing Countries, US AID/National Academy Of Sciences, Jerkyll Island, Georgia, USA, January 1980. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 3 | 9999 | Mbeche, O. O., "Energy Needs In Africa", Proceedings: International Conference On Alternative Energy And The Offer Of The Sun And The Sea, Milano, 18-20 April 1980. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 4 | 2004 | Mbeche, O. O., And J. O. Malo, " Household Travel And Activity Diary: An East African Experience In Transport Survey Methodology", Eastern And Southern Africa Geographical Journal, Submitted In May 2004 Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 5 | 2004 | Mbeche, O. O., "Accessibility Modelling For A Developing Economy: The Case Of Inter-regional Traffic Flows In The Lake Victoria Basin, Kenya" Journal Of Civil Engineering Research And Practice, Vol. 1. April 2004. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 6 | 2004 | Mbeche, O. O.,"An Energy Use Model For A Secondary City In A Developing Country Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 7 | 2003 | Mbeche, O. O., " Singly And Doubly Constrained Gravity Models In Trip Distribution Application For Secondary Cities In The East Africa Region", East African Journal Of Engineering, Submitted In November 2003 Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 8 | 2002 | Mbeche, O. O., " Comparative Evaluation In Estimating Trip Generation Of Primary And Secondary Cities: The Case Of Nairobi And Kisumu, Kenya" African Journal Of Science And Technology, Submitted In July 2002 Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 9 | 2001 | Mbeche, O. O., And T. O. Otieno, "Design Criteria Considerations Of Pedestrian Crossings: The Case Of A Major Arterial In Nairobi", East African Journal Of Engineering, Vol. 6, April 2001. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 10 | 2000 | Mbeche, O. O.,"Management Of Environmental Effects From Rail And Road Traffic In Sub-Saharan Africa" Paper Presented At The Group Expert Meeting On Transport And Sustainable Development, United Nations Department Of (f Economic And Social Affairs (UNDESA) Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 11 | 1999 | Mbeche, O. O., "Energy And Air Quality Assessment In Transport Industry In Kenya". Proceedings: International Roundtable On Transportation Energy Efficiency And Sustainable Development, Cairo, Egypt, UNDESA-World Bank-Egypt Ministry Of Transport, 5-7 Dece Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 12 | 1999 | Mbeche, O. O., "A Review Of Commercial Renewable Energy Initiatives In Kenya." Proceedings: International Symposium On Decentralised Energy Alternatives, UNDESA, Division For Sustainable Development Energy And Transport Branch, Columbia University, New Yo Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 13 | 1998 | Mbeche, O. O.,"EnvironmentaI Impacts Of Energy Use In The Transport Sector: The Case Of Kenya". Proceedings: Workshop On Environmentally Sound Energy Development, United Nations, DESNRM/DESA, United Nations Environment Programme, Nairobi, 12-14 January 19 Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 14 | 1998 | Mbeche, O. O., And T.O. Otieno, "Bicycle Crossings: A Non- Motorised Transport Study In Nairobi". African Urban Quarterly Journal, Vol. 12, 1998. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 15 | 1997 | Mbeche, O. O.,"Patterns Of Transportation Household Energy Use Of A Secondary City In East Africa: The Case Of Kisumu", Eastern And Southern Africa Geographical Journal Vol. 8, 1997. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 16 | 1996 | Mbeche, O. O., "Development Of Data Base And Analysis Of Travel Characteristics In Kisumu: A Case Shidy Of A Secondary City In East Africa", Eastern And Southern Africa "Geographical Journal, Vol. 7, December 1996. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 17 | 1995 | Mbeche, O. O., And G. P. K. Matheri. "Noise And Land Use Conflict: An Environmental Impact Study On Wilson Aerodrome, Nairobi, Kenya" African Journal Of Science And Technology Series A, Vol. 7, April 1995. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 18 | 1993 | Mbeche, O. O., And S. O. Omol, "A Health Service Distribution For Kenyatta National Hospital In Nairobi" African Urban Quarterly Journal, Vol. 7, August 1993. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 19 | 1991 | Mbeche, O. O., "Transit Traffic By Road In East-Central African Sub-Region: Current Status, Problems And Prospects", UNDP/UNCTAD Project RAF/88/015.Proceedings On Transit Traffic: Issues And Prospects (Symposium, Mombasa, Kenya, 20-22 June 1991. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 20 | 1990 | Mbeche, O. O.,"A Transportation Study Of Kisumu Town With Special Reference To Travel Demand Characteristics", Unpublished PhD Thesis, University Of Nairobi, 1990 Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 21 | 1984 | Hydraulic Ram Pump In Kenya Click to View Abstract
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| 22 | 1980 | Schipper, L.., And O. O. Mbeche, "Present And Future Energy Demand In Industry And Services Sector In Kenya", Proceedings: Energy And Environment In East Africa, ERS-3-80, United Nations Environment Programme, Nairobi, 1980. Click to View Abstract Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
This study was conducted in two seasons of2002 at Tigoni, Central Kenya to determine effectiveness of insecticides; neern extract and mineral oil in managing potato aphids and their associated virus diseases. The treatments were arranged in randomized complete block design (RCBD) with four replications. In each season, the number of aphids in five randomly selected plants per treatment was recordced in situ. Virus symptoms (i.ncidence) were scored and expressed as a percentage to the total plant population per plot. Forty-five days after emergence, 10 plants each from guard rows and inner rows were randomly selected and serologically assayed for Potato Virus Y (PVY) and Potato Leaf Roll Virus (PLRV) using DAS ELISA test. Results showd that three aphid species Aphis gossypii (Glover), Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer) colonized on the variety with A. gossypii being the most dominant while M. persicae was least. Higher aphid population coincided with the short rains experienced in one of the seasons. Synthetic insecticides (Bifethrin and dimethoate) were the most effective among the treatments in reducing aphid infestation while the neem extract and mineral oil (DC- Tron) had no significant (P<0.05) difference. However, mineral-oil treated plots recorded the lowest PVY incidence while bifenthrin-Ireated plots had the lowest PLRV incidence. It is suggested that a combination of synthetic insecticides and mineral oil could playa major role in reduction of the aphids and their associated vectors. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 | ||
| 23 | 1980 | "Energy Needs In Africa", Proceedings: International Conference On Alternative Energy And The Offer Of The Sun And The Sea, Milano, 18-20 April 1980. Click to View Abstract
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