Studies were conducted at the Department of Biological Sciences, Usmanu Danfodiyo University, Sokoto, Nigeria, to determine the effects of various doses of commercial biopesticide, Neem-Afri, on the mortality and emergence of adult Callosobrucus maculatus (Fabricius). Thirty air-dried Cowpea, Vigna unguiculata (L.) Walp. Grains, treated with four (10.0, 5.0, 2.0 and 1.0 ml: 100 ml) doses of emulsify able biopesticide, were infested with five pairs of freshly emerged adult C. maculatus and were observed under ambient laboratory conditions. Results showed over 70% adult mortality in all the seeds treated with Neem-Afri biopesticide, and 100% inhibition in seeds treated with 10 ml dose of the commercial pesticide at 4 days and 30 days post treatment respectively.
Keywords: Biopesticides, Cowpea, Callosobruchus maculatus, Neem-Afri, Mortality, Emergence.
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