Obruchus maculatus (Coleoptera: Chrysomelidae) in Stored Vigna unguiculata (Fabales: Fabaceae) SeedsD. Kosini,1,5, E. N. Nukenine,two

Obruchus maculatus (Coleoptera: Chrysomelidae) in Stored Vigna unguiculata (Fabales: Fabaceae) SeedsD. Kosini,1,5, E. N. Nukenine,two G. A. Agbor,3 A. T. Tchinda,three J. P . Abdou,four J. A. G. Yaya,4 3 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, Cholinesterase (ChE) Inhibitor list 3Phytochemistry Laboratory, Institute of Medical Analysis and Medicinal Plants Research (IMPM), P.O. Box 13033, Yaound Cameroon, 4Department of Chemistry, Faculty of Science, University of Ngaound P.O. Box 454, Ngaound Cameroon, and 5Corresponding author, e-mail: [email protected] Topic Editor: Christos AthanassiouReceived 15 October 2020; Editorial selection 7 JanuaryAbstractOne of your most significant international troubles is protecting food from insect pests. The unfavorable effects of synthetic insecticides on human wellness led to a resurgence of interest in botanical insecticides resulting from their minimal ecological unwanted effects. Thus, the insecticidal potential of hexane, acetone, and methanol extracts of Gnidia kraussiana Meisn roots at 1 and 5g/kg, and neem seed oil (NSO), employed as regular insecticide, were evaluated. Ovicidal and larvicidal toxicity was tested by treating freshly laid eggs and larvae at unique immature stages of Callosobruchus maculatus (F Cowpea (Vigna unguiculata) (L.) Walp seed harm and weight loss .). have been assessed immediately after a storage period of 4 mo. Repellency effects were detected in selection test applying a linear olfactometer. All of the fractions had been toxic to C. maculatus; having said that, their bioactivities were inversely correlated with goods polarity. Extracts proved to become a lot more toxic than the industrial NSO. The acetone extract was far more powerful against immature stages of C. maculatus than the methanol extract; eggs, first-, and secondinstar larvae being the far more susceptible. No cowpea seed harm and weight-loss were recorded from the seeds treated with hexane and acetone extracts at the dosage of five g/kg, right after 4 mo of storage. Extracts evoked stronger repellency effects compared with the tested regular insecticide. In line with the above, hexane and acetone extracts are superior candidates for incorporation in integrated pest management programs for the control of C. maculatus in stored cowpea seeds.The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. This really is an Open Access report distributed beneath the terms from the Creative Commons Attribution-NonCommercial License (http://TSH Receptor Formulation creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, offered the original function is effectively cited. For industrial re-use, please get in touch with [email protected] of Insect Science, 2021, Vol. 21, No.Graphical AbstractKey words: cowpea, cowpea weevils, Gnidia kraussiana, toxicity, repellencyOne particular person in every four, in sub-Saharan Africa, lack adequate food to get a healthier and active life (Bremner 2012). On the list of prerequisites for reaching meals safety and reducing undernourishment is the consistent availability of sufficient quantities of proper foods. Constant meals availability is determined by food production, meals trade, and food preservation. Food preservation is definitely an increasing challenge in Africa as a result of postharvest losses causing a substantial threat to meals security and household incomes. In.