Effect of Spinosad against Cowpea Weevil (Callosobruchus maculates L.) in Stored Cowpea (Vigna unguiculata l. Walp) in Maiduguri, Nigeria
Cowpea (Vigna unguiculata l. Walp.) is a crop in the Fabaceae family, genus Vigna. It is also known as black eyed peas or southern peas and is one of the most significant food legumes in tropics and subtropics. Cowpea is a crop that is frequently plagued by a variety of insect pests and illnesses. C. maculatus, the cowpea weevil, is a serious pest. Eggs are placed on cowpea pods or on corridors left by other biting and chewing insects. The study was conducted in the entomology laboratory in the department of crop protection, university of Maiduguri. This work has shown that spinosad dust is effective on the control of C. maculatus in stored cowpea with efficient results at all concentration (doses) i.e. whether at (0.0, 0.2, 0.5, 0.7and 1.0 g) and at the different hours of exposure from the experiment. As it was observed the chemical shows adverse effect on percentage mortality of the C. maculatus.
Keywords: Cowpea (Vigna unguiculata l. Walp), Cowpea Weevil (Callosobruchus maculates L.).