Comparative Experimental Effects of Intercropping and Cypermethrin on Insect Pest Infestation and Yield of Maize, Cowpea and Okra in Two Cameroonian Agro-Ecological Zones

The present study investigates the effect of intercropping (maize-cowpea, maize-okra, maize-okra-cowpea, okra-cowpea) compared to insecticide application on level infestation insect pests and final yield maize, cowpea okra. Field experiments were conducted during 2016 2017 cropping seasons in Guinean Savannah (Dang-Ngaoundere) Sudano Sahelian (Gouna-Garoua) agro-ecological zones Cameroon. Our experimental design was a split plot arrangement randomized complete block with four replications. main factor assigned use (Cypermethrin) sub plots devoted for systems. We efficiency that Cypermethrin Yield okra as influenced by pest damages. comparison monocropped sprayed unsprayed showed that, Dang, reduced maize 37% 24% 2017, respectively, whereas Gouna, it lower than 8% both years. Reduction seed Dang represented 47% 50% 55% 63% respectively. For okra, fruit 25% 44% 23% 28% 2017. Crop monoculture due competition plants association different resources. Considering total yields obtained from each intercropping, trials resulted generally higher mono-culture (LER > 1) sites years but respective quite different. On basis results obtained, we recommend maize-cowpea sustainable solution reduce their insects.