Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

STUDY THE EFFECTIVENESS OF PLANT MATERIALS IN CONTROLLING PULSE BEETLE, CALLOSOBRUCHUS CHINENSIS ON LENTIL SEEDS (Pages : 16 - 26)

The leaf extract and powder of Polygonum hydropiper (biskatali), Vitex negundo (nishinda), Calotropis gigantea (akanda), Azadirachta indica (neem), Aphanamixis polystachya (pithraj) and seed oil of neem and pithraj were tested in the laboratory for their effectiveness against the attack of Callosobruchus chinensis on lentil seeds. The seeds treated with plant materials were also tested for their viability after six months storing. The oviposition and adult emergence of C. chinensis were significantly different among the various treatments. Biskatali leaf extract at 6% dose was most effective reducing 48.69% oviposition and 54.63% adult emergence compared to control. The treatment of neem leaf extract caused slightly less oviposition rate and adult emergence. The pulse beetle built up large populations in six months storage period causing 97.34% seed damage in untreated condition. Biskatali leaf extract being potent plant material reduced 2.01 times less quantitative loss of lentil seeds. The other plant materials showed less reduction of seed damage than in biskatali leaf extract. The mortality of adult pulse beetle increased with dose and exposure time and the mortality was dose-dependant. It was found that all the twelve plant materials were toxic to C. chinensis and their effectivenesses were in the following descending order: biskatali leaf extract, neem leaf extract, biskatali leaf powder, neem oil, nisainda leaf extract, neem leaf powder, nishinda leaf powder, akanda leaf extracts, pithraj oil, akanda leaf powder, pithraj leaf extract, pithraj leaf powder. The germination rate of lentil seeds was found higher treated with different plant materials than control. The germination rate was found 1.65 times higher in the treatment of leaf extract and powder of biskatali and neem than the control treatment. Download