Efficacy of different botanical products on cowpea weevil (Callosobruchus maculatus) in stored cowpea seeds

Abstract

An experiment was conducted to determine efficacy of different botanical product against storage pest of cowpea, Cowpea weevil (Callosobruchus maculatus), in completely randomized design (CRD) with seven treatments and three replications in entomology lab of Prithu Technical College, Lamahi, Dang. Effects of treatments on adult emergence of cowpea weevil, mortality of cowpea weevil and number of grains affected were assessed. Data were collected three times in every month interval taking 20 g sample randomly from each treatment. Mustard oil was very effective to the management of cowpea weevil as minimum mean adult emergence of cowpea weevil (25) and affected grains (23.33) and higher adult mortality of cowpea weevil (40) was recorded under the treatment of mustard oil at 90 days. This study clearly shows botanical products is very effective for the control of storage grain pest as well as maintaining higher quality of grains.