V. K. TIWARI, K. C. SHARMA AND O. P. AMETA

A laboratory experiment was conducted on the management of pulse beetle, Callosobruchus chinensis L. (Coleoptera: Bruchidae) through powdered plant products at Post Harvest Technology Scheme, College of Technology and Engineering, Udaipur during July to December 2011. Among the powdered plant products custard apple seed powder showed the maximum (83.67%) mortality. The minimum (23.0%) mortality was observed in grains treated with curry leaf powder (1.0%). The lowest number of eggs (1.00 egg/seed) was recorded on grain treated with custard apple seed powder (20  g/kg). The minimum adults (5.10) were emerged in seeds treated with custard apple seed powder (20 g/kg). The leaf powders of custard apple exhibited maximum number of (6.10) adults. Pulse beetle made fewest holes (0.10/seed) in grains treated with custard apple seed powder. The minimum weight loss of 3.29 per cent was recorded in custard apple seed powder treated grains. Cowpea seeds treated with custard apple seed powder at 20g/kg exhibited the maximum (66.88%) inhibition followed by neem seed kernel powder (66.62%). The minimum 60.39 per cent adult inhibitions were exhibited by custard apple leaf powder. No adverse effect on the germination of cowpea seeds was observed when treated with different doses of plant powders used as grain protectants at 0, 30, 60, 90 and 120 days after treatment.