Obruchus maculatus (Coleoptera: Chrysomelidae) in Stored Vigna unguiculata (Fabales: Fabaceae) SeedsD. Kosini,1,5, E. N. Nukenine,two G. A. Agbor,three A. T. Tchinda,3 J. P . Abdou,4 J. A. G. Yaya,4 three and T. K. KowaFaculty of Medicine and Biomedical Sciences, University of Ngaound P.O. Box 317, Garoua, Cameroon, 2Department of Biological Sciences, Faculty of Science, University of Ngaound P.O. Box 454, Ngaound Cameroon, 3Phytochemistry Laboratory, Institute of Healthcare Investigation and Medicinal Plants Studies (IMPM), P.O. Box 13033, MEK1 site Yaound Cameroon, 4Department of Chemistry, Faculty of Science, University of Ngaound P.O. Box 454, Ngaound Cameroon, and 5Corresponding author, e-mail: [email protected] Subject Editor: Christos AthanassiouReceived 15 October 2020; Editorial decision 7 JanuaryAbstractOne in the most important global challenges is guarding food from insect pests. The unfavorable effects of synthetic insecticides on human wellness led to a resurgence of interest in botanical insecticides on account of their minimal ecological side effects. As a result, the insecticidal prospective of hexane, acetone, and methanol extracts of Gnidia kraussiana Meisn roots at 1 and 5g/kg, and neem seed oil (NSO), used as typical insecticide, were evaluated. Ovicidal and larvicidal toxicity was tested by treating freshly laid eggs and larvae at various TrxR Species immature stages of Callosobruchus maculatus (F Cowpea (Vigna unguiculata) (L.) Walp seed harm and fat reduction .). have been assessed after a storage period of 4 mo. Repellency effects were detected in decision test using a linear olfactometer. All of the fractions have been toxic to C. maculatus; nevertheless, their bioactivities were inversely correlated with solutions polarity. Extracts proved to become additional toxic than the industrial NSO. The acetone extract was additional productive against immature stages of C. maculatus than the methanol extract; eggs, first-, and secondinstar larvae becoming the a lot more susceptible. No cowpea seed damage and weight loss were recorded from the seeds treated with hexane and acetone extracts in the dosage of five g/kg, immediately after four mo of storage. Extracts evoked stronger repellency effects compared with the tested regular insecticide. Based on the above, hexane and acetone extracts are superior candidates for incorporation in integrated pest management applications for the manage of C. maculatus in stored cowpea seeds.The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. That is an Open Access write-up distributed below the terms of your Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, supplied the original operate is effectively cited. For commercial re-use, please speak to [email protected] of Insect Science, 2021, Vol. 21, No.Graphical AbstractKey words: cowpea, cowpea weevils, Gnidia kraussiana, toxicity, repellencyOne person in every 4, in sub-Saharan Africa, lack adequate meals to get a healthful and active life (Bremner 2012). One of the prerequisites for reaching meals safety and minimizing undernourishment is definitely the consistent availability of enough quantities of appropriate foods. Consistent food availability is determined by food production, meals trade, and meals preservation. Food preservation is an increasing challenge in Africa on account of postharvest losses causing a considerable threat to food security and household incomes. In.
