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Journal of Entomology

Year: 2007 | Volume: 4 | Issue: 1 | Page No.: 51-55
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Authors

R.O. Akinkurolere

Keywords

Research Article

Assessment of the Insecticidal Properties of Anchomanes difformis (P. Beauv.) Powder on Five Beetles of Stored Produce

R.O. Akinkurolere
Biological activity of Anchomanes difformis powder was assessed under prevailing atmospheric condition (28±2°C, 70-75 r.h.) in the laboratory on Sitophilus zeamais (Motschulsky), Tribolium castaneum (Herbst), Oryzaephilus mercator (Fauvel), Callosobruchus maculatus (Fabricius) and Lasioderma serricorne (Fabricius) at three treatment levels of 0.5, 1.0, 1.5 g of plant powder per 25 g food medium. Percentage beetle mortality was scored at 24, 48 and 72 h after treatment. The plant powder was found to be toxic on all the test beetles at 0.5 g treatments within 24 h of plant powder application except on L. serricorne. The highest mortality of 100% was recorded in C. maculatus after 72 h at 1.5 g treatment level thus; making C. maculatus most susceptible to A. difformis powder treatment. In a further evaluation of A. difformis on survival and development of C. maculatus, oviposition and adult emergence were significantly reduced in treatments compared to control. Generally, the bioactivity of A. difformis powder on development of immature stages and emergence of adult C. maculatus were more pronounced in 1.5 g treated grains. Thus, application of A. difformis plant powder could be employed in integrated pest management for C. maculatus control.
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