Evaluation of leaf and vine powders of Secamone afzelii (Schult) K. Schum for control of Callosobruchus maculatus (Fab.) (Coleoptera: Bruchidae) in stored cowpea Vigna unguiculata (L.) Walp.

J. M. Adesina; T. I. Ofuya

doi:10.38150/sajeb.1(3).p158-162

Authors

J. M. Adesina Agricultural Technology Department, Rufus Giwa Polytechnic, P. M. B 1019, Owo, Ondo state, Nigeria
T. I. Ofuya Federal University of Technology, P. M. B. 704, Akure, Ondo State,

DOI:

https://doi.org/10.38150/sajeb.1(3).p158-162

Abstract

The experiment was carried out to evaluate the efficacy of Secamone afzeliileaf and vine powders applied at the rate of 0.5g, 1.0g, 1.5g and 2.0g underambient laboratory conditions on Callosobruchus maculatus on stored cowpea.Mortality of adult insects at 48 h post treatment, number of eggs laid,adult emergence, adult exit holes and percentage weight loss in each treatmentwere compared with those of control. The results indicated that vinepowder caused significantly greater kill (P < 0.05) of C. maculatus adultswhen applied at 2.0g than other dosages. The application rate of 2.0g of leafpowder was able to cause reduction in number of eggs laid by the weevil(5.67/20g seed) and significantly (P < 0.05) suppressed adult emergence(21.12). Adult exit holes and percentage weight loss were significantly reducedat all levels of application. It is concluded that Secamone afzelii hasgreat potential for use as a plantÃ¢â‚¬Âbased biopesticide for controlling C. maculatuson stored cowpea.