Entomocidal Activity of Psidium Guajava L. Stem Bark Against Callosobruchus Maculatus Fabricius (coleoptera: Bruchidae) Infesting Stored Cowpea Seeds

Student: Oluwatimileyin Isiaq Olaobaju (Project, 2025)
Department of Plant Science and Biotechnology
Ekiti State University, Ado-Ekiti, Ekiti State

Abstract

This study was conducted in the laboratory to evaluate the toxicity of Psidium guajava stem bark extracts and powders against Callosobruchus maculatus infesting stored cowpea seeds. The powder stem bark powder was extracted with ethanol, at 60oC, using Soxhlet extractor. The extract was treated on the cowpea seeds at the dosage of 0.5, 1.0, 1.5 and 2.0 mL/20g while the powder was treated at 0.5, 1.0, 1.5 and 2.0g/20g. Data were obtained from insect mortality, oviposition and adult emergence. All plant powders and extracts significantly (P

Keywords
Psidium guajava; Entomocidal activity; Callosobruchus maculatus; Stem bark extract; Stored cowpea seeds; Botanical insecticides; Post-harvest protection
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