Beanfly infestation on common bean (Phaseolus vulgaris L.) in Kenya
1990
Nderitu, J.H. | Kayumbo, H.Y. | Mueke, J.M.
The population patterns of eggs, larvae and puparia on bean plants and leaf punctures made by adults were investigated during cropping (March-July; October-January) and noncropping (July-October) seasons at two sites in Kenya. Bean grown in noncropping seasons had more leaf punctures, eggs, larvae and puparia than bean grown in cropping seasons. Bean sown in noncropping seasons attracted unusually high beanfly populations from surrounding weeds as well as previous crops. Under field conditions, the beanfly species, Ophiomyia spencerella Greathead and O. phaseoli Tryon, infested bean plants in all seasons. Both species normally oviposited in punctures on the leaves but O. spencerella also oviposited in the stems of bean seedlings
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