ISSN 2756-3367
African Journal of Ecology and Ecosystems ISSN 2756-3367 Vol. 11 (4), pp. 001-006, April, 2024. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Biopesticidal potential of hexane extracts from three plant species against bean weevil and maize weevil
O. O. Ogunsina1*, M. O. Oladimeji2 and L. Lajide1
1Department of Chemistry, Federal University of Technology, Akure, Ondo State, Nigeria.
2Joseph Ayo Babalola University, Ikeji-Arakeji, Osun State, Nigeria.
Accepted 18 November, 2023
Abstract
A study was conducted to evaluate the insecticidal action of hexane extracts of three locally available plants namely: Lantana camara (Verbenaceae), African nutmeg [Monodora myristica (Gaerth) Dunal] and Enuopiri [Euphorbia lateriflora, Schum and Thonner] against bean weevil Callosobruchus maculatus (F.) and maize weevil, Sitophilus zeamais) Motsch with response to the insect mortality. Results revealed that all test materials exhibited mortality action against bean weevil and maize weevil. African nutmeg extracts had greater mortality action against both the beans weevil (100%) and maize weevil (96%) after 24 h of treatment. Lantana extracts were observed to have moderate mortality effect; bean weevil (93%) and maize weevil (73.3%) while Enuopiri had average mortality effect; bean weevil (46.7%) and maize weevil (50%) all with extract concentration of 10 g/100 ml (extract/solvent). The overall results showed that bean weevil was much more susceptible to all the extracts than maize weevil, having recorded the height mortality rate.
Key words: Bean weevil, maize weevil, Lantana camara, African nutmeg, Enuopiri, mortality.