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Effects of the interaction of two levels of the black bean aphid, Aphis fabae Scopoli (Homoptera: Aphididae), and four stages of plant growth and development on the performance of the common bean, Phaseolus vulgaris L., under greenhouse conditions in Kenya
(University of Nairobi, 1985)
Damage caused by the black bean aphid, Aphis fabae Scopoli, on the common bean, Phaseolus vulgaris L., was severest when the aphids were transferred onto bean plants during the preflowering stage. There were significant ...
Effects of infestation and transmission of the common bean mosaic virus (CBMV) by the black bean aphid A. fabae on the common bean P. vulgaris.
(University of Nairobi, 1982)
Damage caused to vegetative growth and yield of bean (Phaseolus vulgaris) by Aphis fabae combined with bean common mosaic virus was generally significant when aphid infestation occurred during the early and late vegetative ...
Search in the available cowpea germplasm for sources of resistance to the common pod-sucking bugs Riptortus dentipes (F.) and Anoplocnemis curvipes (F.).
(University of Nairobi, 1985)
In trials at Ibadan, Nigeria, and Kikambala, Kenya, none of the 4180 Vigna unguiculata cultivars screened were highly resistant in the field, although 33 were moderately resistant to both pests, sustaining 20-39% pod damage. ...
Insect pests of sunflower (Helianthus annuus L.) in Kenya
(University of Nairobi, 1982)
The pest complex of sunflower and its relative abundance and economic importance are discussed. A total of 80 insect species were collected—five of these were recorded on roots, 51 on stems and leaves and 29 on floral parts ...
Susceptibility of Dysdercus species Boisduval (Hemiptera: Pyrrhocoridae) to selected synthetic pyrethroids.
(University of Nairobi, 1988)
The relative susceptibility of 4 populations of Dysdercus fasciatus and one population each of D. nigrofasciatus, D. cardinalis and D. superstitiosus to topical application of cypermethrin, fenvalerate and permethrin was ...
Sources of resistance to the common cowpea pod sucking bugs Riptortus dentipes (Fabricius) and Anoplocnemis curvipes (Fabricius) in cowpea Vigna unguiculata (L.) Walp
(University of Nairobi, 1985)
The successful preliminary field evaluation in Kenya of 4022 cultivars of Vigna unguiculata from around the world revealed that >99% of them were susceptible to damage caused by the coreids Riptortus dentipes and Anoplocnemis ...