A study was carried out at the Makerere University Agricultural
Research Institute, Kabanyolo over four cropping seasons (1990-1992) to
determine the range of pests attacking pigeonpeas ( Cajanus cajan (L)
Millsp.) in Uganda, and to assess their status depending on occurrence
and nature of damage. Of the species identified, there were seven
lepidopterans, two homopterans, three heteropterans and coleopterans,
each, and one dipteran, hymenopteran, isopteran and thysonopteran
insects and jassids (Homoptera), cowbugs (Heteroptera), leaf Webbers
and defoliators (Lepidoptera), leaf beetles (Coleoptera) and
grasshoppers (Orthoptera). Seven identified species were new records on
the crop in the country. The most commonly occurring species were Aphis
craccivora (Koch), Helicoverpa armigera (Hub), Maruca testulalis
(Geyer), Etiella zinckenella (Treitschke), Melanogromyza chalcosoma
Spencer, Tanaostigmodes cajaninae LaSalle and Clavigralla sp