Browsing by Author "Lawal, M.T., Musa, A.K., Uddin II, R.O., and Yusuf, S.Y."
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Item Potential of Sweet Orange (Citrus sinensis L. Osbeck) Peel Extract as Insecticidal Agent against Cowpea Bruchid, Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae: Bruchinae)(Horticultural Society of Nigeria (HORTSON), 2018-11-04) Lawal, M.T., Musa, A.K., Uddin II, R.O., and Yusuf, S.Y.Laboratory experiments were conducted to examine the insecticidal potential of C. sinensis peel extract against cowpea bruchid, Callosobruchusmaculatus(F.) (Coleoptera: Chrysomelidae). The effectiveness of C. sinensis peel extract was determined as seed protectant against damage by adult cowpea beetle, C. maculatus at 0, 5, 10 and 15 μl administered on Whatman No. 1 filter paper in 100 μl methanol using micropipette and placed in a 9 cm Petri dish with a cover. Citrus peel oil was extracted using the Soxhlet extraction technique and the oil was concentrated in steam water bath at 400C. The experiment was arranged in a completely randomized design (CRD) replicated four times. Ten unsexed 1–2 day old adult C. maculatus were introduced on 20 g cowpea seed placed in the Petri dish containing different rates of extracts. Methanol extract of Citrus peel at the highest concentration gave complete mortality 2 days after treatment (DAT). The results also showed that cowpea seeds loss in all the peel extract-treated seeds was significantly (p<0.05) lower (1.17-3.40%) than in the control (3.30-6.33%). The higher concentrations of peel extract caused significant reduction in progeny emergence of the insect. The present study shows that the sweet orange extract has potential to cause mortality of C. maculatus and so can be used against the pest under small scale storage.