OAR@ICRISATEfficacy of Different Insecticides for Pigeonpea Pest Management in KenyaE MMinjaauthorT GShanowerauthorS NSilimauthorOKaruruauthorTrials were conducted at Kabete and Kiboko in 1995-96 to evaluate the efficacy of some insecticides on short-, medium- and long-duration pigeon pea (Cajanus cajan) genotypes. At Kabete, endosulfan, dimethoate, pirimiphos-methyl, fluvalinate, Bacillus thuringiensis and neem extract were evaluated on short-duration genotype ICPL 87091. At Kiboko, endosulfan, dimethoate, pirimiphos-methyl, B. thuringiensis and deltamethrin were evaluated on short-duration ICPL 87091, medium-duration ICP 6927 and long-duration ICEAP 00020. The major insect pests on pigeon pea were pod borers (Helicoverpa armigera, Maruca vitrata, Etiella zinckenella and Lampides boeticus at Kiboko, and H. armigera, E. zinckenella and L. boeticus at Kabete), pod-sucking bugs (Clavigralla tomentosicollis) and pod fly (Melanagromyza chalcosoma). The results indicated that all sprays improved grain yields and seed quality at Kabete, with 57-152% grain yield gains with different insecticides. Endosulfan performed better among the high volume sprayed insecticides at Kabete. Pod fly damage was less in plots treated with dimethoate and endosulfan. Results from Kiboko showed that ultra-low-volume (ULV) spraying was more efficient than high volume sprayed insecticides. Endosulfan was also good among the high volume sprays. Spraying the short-duration genotype with ULV resulted in lower pest population than the medium- and long-duration genotypes. Neem extract and B. thuringiensis were not as effective as the synthetic insecticides at both locations.Pigeonpea2000Article

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