Synergistic Bioefficacy of Botanical Insecticides against Zabrotes subfasciatus (Coleoptera: Bruchidae) a Major Storage Pest of Common Bean
- *Corresponding Author:
- A Tamiru
International Centre of Insect Physiology and Ecology
PO Box 30772-00100, Nairobi, Kenya
E-mail: [email protected]
Received Date: October 30, 2016; Accepted Date: November 17, 2016; Published Date: November 29, 2016
Citation: Tamiru A, Bayih T, Chimdessa M (2016) Synergistic Bioefficacy of Botanical Insecticides against Zabrotes subfasciatus (Coleoptera: Bruchidae) a Major Storage Pest of Common Bean. J Fertil Pestic 7: 171. doi:10.4172/2471- 2728.1000171
Copyright: © 2016 Tamiru A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
This experiment was conducted to determine possibilities of synergism among insecticidal plants against Z. subfasciatus with a view of augmenting potency and reducing dosage rates. Leaf and seed powders of five insecticidal plants, namely Jatropha curcas (L.), Datura stramonium (L.), Chenopodium ambrosioides (L.), Schinus molle (L.) and Azadrachta indica (A. Juss) were mixed to 1% and 2%w/w unitary and binary formulations. The synthetic insecticide primiphos methyl at the rate of 0.1/100 gm grain dust and untreated grains were used as positive and negative controls, respectively. Most binary formulation had better efficacy than their constituent unitary formulation especially at lower dosage rates. Synergistic combination of botanical powders resulted in highest adult mortality, F1 progeny reduction and lowest weevil perforation index and weight loss comparable to chemical standard primiphos methyl. Among the botanical combinations, bean seeds treated with binary formulation of C. ambrosioides with D. stramonium, J. curcas and S. molle gave the best efficacy in controlling Z. subfasciatus.