Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
March 2014 Vol. 3(3): pp. 100-105
Copyright © 2014 Global Advanced Research Journals
Full Length Research Paper
Effects of Pre-harvest application of Lamda-cyhalothrin and Neem Seed Extracts in the management of Cowpea bruchid, Callosobruchus maculatus Fab.(Coleoptera:Bruchidae) on stored cowpea.
1Ahmed*, I.A., 2Kiyawa, S.A., 3Maryam, T.A., 4Kutama, A.S and 5Isah, I.B.
1Samaru College of Agriculture, Division of Agricultural Colleges, A.B.U. Zaria
2Department of Chemistry, F.C.E. Ttech) Bichi
3Department of Science Laboratory Technology, Kano State Polytechnic
4Department of biological sciences, Federal University, Dutse
5Department of Biological Sciences, Police Academy, Wudil
Corresponding Author’s E-mail: inusaahmed@gmail.com
Accepted 21 March, 2014
Abstract
Field and Laboratory experiment was conducted to investigate the effect of pre-harvest application of synthetic insecticide, lamda-cyhalothrin and botanical, neem seed extract on cowpea bruchid, Callosobruchus maculatus Fab. Samaru, Zaria, Nigeria. The designs used were Randomized Complete Block Design and Completely Randomized Design for field and laboratory experiments respectively. The cowpea variety used was SAMPEA-7, which was sown on 4th and 6thAugust in 2007 and 2008 respectively. Six treatments were used which were designated as T1,T2 and T3 for 2,3 and 4 sprays of Landa-cyhalothrin; T4 and T5 for 5 and 6 sprays of neem seed extract; and T6 as a control where there was no spray of either of insecticides. The treatments were replicated four times. The parameters assessed were number of bruchids per treatments, percentage of seeds damaged and percentage germination of the seeds. The lowest number of C. maculatus and lowest percentage of seeds damaged were recorded in the seeds from those plots that have one pre-harvest sprays of lamda-cyhalothrin and neem seed extract. At the end of the storage period of six months highest germination percentage was recorded in the seeds from the plots that were sprayed four times with lamda-cyhalothrin and from those sprayed six times with neem seed extract. Germination percentages were highest in the seeds from the plots that were sprayed four times with lamda-cyhalothrin and six times with neem seed extract. And their last sprays were carried out eighty-two days after sowing (82 DAS) as pre-harvest spray which had significantly reduce the initial initial infestation of the cowpea seeds by C.maculatus
Keywords: cowpea, Callosobruchus, insecticides, lamda-cyhalothrin, neem, pre-harvest.
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