Browsing Faculty of Science & Technology (FST) by Author "Nderitu, J"
Now showing items 1-4 of 4
-
Effect Of Insecticide Use On Sunflower (helianthus Annus L.) Pollination And Yield, In Makueni District, Eastern Kenya
Oronje, ML; Nderitu, J; Nyamasyo, G (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2003)Sunflower variety 8998 and insecticides; Dimethoate and Karate were used to evaluate the effect of insecticide on pollinators visit and consequently on sunflower yield. Effect of time of spray on seed set was also ... -
Effectiveness of entomopathogenic nematodes against sweet potato weevil (Cylas puncticollis) Boheman (Coleoptera: Apionidae) under semi-field conditions in Kenya
Nderitu, J; Sila, M; Nyamasyo, G; Kasina, M (University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2009)Sweet potato (Ipomoea batatas (L.) Lam.) ranks second in production and value after cassava among the root crops in Kenya. Its production has been declining mainly due to the damaging effects of Cylas puncticolis Boheman ... -
Sunflower pollinators in Kenya: Does diversity influence seed yield?
Kasina, M; Nderitu, J; Nyamasyo, G; Oronje, ML (University of NairobiDepartment of Zoology, 2007)A field experiment was carried out in 2004 and 2005 to study diversity of sunflower ( Helianthus annuus L.) pollinators and their influence on seed yield in Makueni district, a semi - arid area in Eastern Kenya. ... -
Utilization Of Synthetic And Botanical Insecticides To Manage Thrips (thysan.: Thrip.) On Snap Beans (fabaceae) In Kenya
Nderitu, J; Mwangi, F; Nyamasyo, G; Kasina, M (University of NairobiDepartment of Plant Science and Crop Protection, University of NairobiSchool of Biological Sciences, University of NairobiEntomology & Biotechnology, Kenya Agricultural Research Institute, 2010-01)This field experiment was performed in Mwea–Tebere, Central Kenya, to evaluate and compare effectiveness of synthetic insecticides (Thiacloprid and chloropyrifos) and botanical insecticides (azadirachtin 0.15% A.I. and ...