International Journal of Entomology Research

Authors
Kalpna, Shailja Kumari, Rajesh Kumar

Abstract
Callosobruchus maculatus is the ubiquitous and devastating pest of black gram seeds. The infestation starts from the fields and reaches up to the store houses. Synthetic pesticides are health hazardous and disturb the environment. Botanical pesticides are effective and promising alternative against stored grain pests. The present research was conducted with Leucaena leucocephala seed as powder. The results vary with different doses concentrations. During preliminary tests the number of adults emerged was found 51.4±3.12 adults at the dose of 5g/kg which was further followed with 66.2±3.2, 200.0±4.47, 211±4.30 at the dose of 10.0, 2.5, and 1.25 respectively. The adult mortality was 86% at the dose of 10g/kg. Similarly, the inhibition rate and egg reduction% were recorded 90.93% and 63.97% respectively at the dose rate of 10g/kg. In the ovicidal test, inhibition % were found 100 % with Leucaena seed powder against 100 egg bearing black gram seeds at 20 g/kg and no adult was emerged. With further lower doses the results was also promising comparatively untreated control. However Leucaena seeds were also effective at 10g/kg and show no adult emergence. In larvicidal study with treatment of seed powder of Leucaena, the complete adult inhibition was found with 1st, 2nd and 3rd larval instars at 20g/kg dose. With 4th instar larva the inhibition % were found more than 90% but not complete.