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The post-harvest preservation of cowpea in developing countries has been a major challenge because of Callosobruchus maculatus infestations. This study compared the response of C. maculatus (F.) to Momordica charantia and Acalypha wilkesiana powders in stored cowpea seeds under laboratory conditions. Five pairs of freshly emerged C. maculatus adults were introduced into a Petri-dish containing 20 g of cowpea admixed with 0.2, 0.4, 0.6 and 0.8 g of each plant powder. This procedure was replicated three times in a completely randomized design. The adult mortality was recorded at 24 hours intervals for 5 days, and oviposition was recorded after 48 hours. In addition, newly emerged insects were recorded 30-35 days after infestation, and weight loss was also determined. The treatments had a significant increase in C. maculatus adult mortality as the exposure period and dosage increased; the highest values (90 and 100% for A. wilkesiana and M. charantia, respectively) 1 Federal University of Technology Akure, Department of Crop, Soil and Pest Management, Akure (Nigeria). ORCID Adeboye, O.R.: 0000-0002-4679-821X; ORCID Oni, M.O.: 0000-0002-3053-3567 2 Rufus Giwa Polytechnic, Department of Crop, Soil and Pest Management Technology, Owo (Nigeria). ORCID Adesina, J.M.: 0000-0003-1174-9095 3 Corresponding author. moboladesina@rugipo.edu.ng SCIENTIFIC NOTE

revista colombiana de ciencias hortícolas/revista colombiana de ciencias hortícolas

Comparative response of Callosobruchus maculatus (Fab.) (Coleoptera: Chysomelidae) to Momordica charantia and Acalypha wilkesiana powders in stored cowpea (Vigna unguiculata) (Walp.)