The insecticidal potential of Millettia ferruginea, Clematis hirsuta, Calpurnia aurea, Acokanthera schimperiand Maesa lanceolata against Callosobruchus chinensis was evaluated in the laboratory. Leaf and seed of the botanical plants were dried under shed, grinded and prepared in powder forms. From each plant powder, three different doses i.e. 5, 7.5 and 10g per 100g chickpea grain were prepared. For rearing tested C. chinensis, 120 unsexed adult bruchids were collected from the host grain chickpea and introduced in to jars which contained substratum chickpea seeds within a temperature fluctuated between 27 to 320C. From the reared bruchids, 2-3 day aged 12Â°C. Chinensis were introduced in to the jar. Chickpea seeds were separately mixed with botanical powders and evaluated for 24, 48 and 72hours. Malathion dust used as standard check and control was used for comparison. The selected five botanical powders applied as treatment were effective to cause mortality towards C. chinensis and it was significant (P<0.05) after 24hour. Among five selected botanicals, Calpurnia aurea showed significantly higher mortality on C. chinensis within different doses and exposure times, which 100% mortality within 10%w/w powder after 48 hours. However Maesa lanceolata leaf powder at lower dose (5%) and short time (24hour) was less effective (11.11%). Similarly, all the tested botanical powders significantly (P<0.05) caused higher mortality to C. chinensis compared to untreated. The botanical plants treatments reduced weight loss that caused with bruchids after 60 day. The highest weight loss (1.6%) was scored on Maesa lanceolata at lower concentration and there was no any harmful effect for chickpea seed germination. Based on the results obtained it can be concluded that the application of those botanical leaves and seed powders had a great potential for protection of chickpea during storage particularly at a high rate and exposure time. So use of those botanicals for protection of stored chickpea is better than other than synthetic pesticide control method in aspects.
Keywords: Botanicals, bruchids, chickpea, mortality, doses response, storage