The toxicity potential of different plant parts of M. ferruginea (Hochest) Baker was tested against Sitophilus zeamais (Motsch.) in maize seeds and on filter paper. Leaf, pod and bark extracts prepared using different solvents were not toxic to the weevil at all levels of applications on filter paper. Polar solvents seed powder extracts were, however, significantly toxic. Among these, acetone extract was the most toxic extract and with the dose-response bioassay, LD 50 = 65.45 mg per filter paper. Based on previous reports, the toxicity of the plant may be attributed to rotenone. Seed powder applied at 10% w/w to maize seeds was also toxic to the weevil and caused significant reduction in reproduction (F 1 progeny production).
International Journal of Pest Management
Volume 48, 2002 - Issue 1
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