EFFECT OF FUMIGATION OF POWDER LEAF AND SEED EXTRACTS OF JATROPHA CURCAS L. ON CALLOSOBRUCHUS SUBINNOTATUS (PIC) ON STORED BAMBARA (VIGNA SUBTERRANEA (L.) VERDCOURT) NUTS

The research was conducted in the year 2017 at the Entomology Laboratory of the Department of Crop Protection, Bayero University, Kano to assess fumigation properties of Jatropha curcas L. leaf and seed powders on Callosobruchus subinnotatus (Pic) infesting stored bambara nut, Vigna subterranea (L.) Verdcourt. The study aimed at comparing the effectiveness of the products with conventional chemical insecticide (pirimiphos-methyl 2%). Factorial experiment of 2×2×2 levels (leaf and seed powders at the rates of 0.0, 0.5. 1.0 and 1.5 g, with and without addition of the synthetic chemical at 0.01 g/20 g bambara nut seed) were laid out in a completely randomized design and replicated three times. Fumigant toxicity effect was observed on the emerged insects, though the result was significantly (P< 0.001) lower. In conclusion, appreciable level of protection on bambara nut seeds was achieved using seed powder of J. curcas. Therefore, it is recommended that for effective management of C. subinnotatus infesting bambara nut, farmers could use 1.0 g seed powder on 20 g bambara nut seeds.