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Effect of Piper nigrum seed powder and dust formulation on Callosobruchus maculatus (f.) Govindan K., Nelson S. Jeyarajan Department of Agril. Entomology, Agril. College and Res. Institute, Killikulam, 628 252, India. Abstract Piper nigrum 2.0% seed powder acted as the best ovipositional deterrent. Adult emergence ranged between 6.6 (P. nigrum 1.50%) and 16.0 (P. nigrum 0.25%). In Pn10DT 4.0%, 39.9 eggs were laid. Seed weight loss was less (0.18%) in Pn10DT 4.0%. Germination was maximum (90.6%) in Pn10DT 4.0%. This was most effective in reducing the oviposition. Egg hatchability of Callosobruchus maculatus ranged between 57.1 (Pn10DF 2.0%) and 73.7% (Pn10DF 1.0%). Only 7.0 beetles emerged from the seeds treated with Pn10DF 4.0%. Seed weight loss was 0.3% in Pn10DF 4.0 and 3.5%. Germination ranged between 57.3 (Pn10DF 0.5%) and 93.3% (Pn10DF 4.0%). Top Key words Callosobruchus maculatus, Oviposition, Piper nigrum. Top | | | |
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