Journal of Applied and Natural Science 7 (1): 187–191 (2015)
Deterrent effect of plant extracts against Callosobruchus maculatus on stored cowpea in Saurashtra (Gujarat, India)
J. A. Chudasama*, N. B. Sagarka1 and Satyakumari Sharma1
*Department of Entomology, College of Agriculture, Junagadh Agricultural University, Junagadh – 362 001 (Gujarat), INDIA.
1Department of Agronomy, College of Agriculture, Junagadh Agricultural University, Junagadh – 362 001 (Gujarat), INDIA.
*Corresponding author. E-Mail: email@example.com
Abstract : A laboratory study was conducted at the JAU, Junagadh (Gujarat) during 2013-14 on the
deterrent effect of different aqueous plant extracts against pulse beetle, Callosobruchus maculatus (Fabricius) (Coleoptera:
Bruchidae) in stored seeds of cowpea, Vigna unguiculata (L.). Among different aqueous extracts of plants materials, maximum
percentage of oviposition deterrence was observed in custard apple seed extract (67.19%), custard apple leaf extract (65.95%),
neem seed extract (65.44%), mustard seed extract (64.65%) and jatropha leaf extract (64.16%) at 5 per cent concentration. The
maximum adult emergence reduction was seen in custard apple seed extract (78.45%), custard apple leaf extract (77.14%) and
neem seed kernel extract (NSKE) (77.09%) at 5 per cent dose level. Minimum weight loss percentage was observed in the cowpea
seeds treated with custard apple seed extract at 5% dose level, which recorded 79.20%. The results revealed that all of the
tested materials with some variations had deterrent and toxic effects against the pest.
Keywords : Callosobruchus maculatus, Cowpea, Plant extract