Preliminary Test on Insecticidal Effect of Physic Nut (Jatropha curcas Linn.) Extract Against the Eggplant Mealy Bug (Ferrisia virgata)
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Abstract
The toxicity of different concentrations of Jatropha curcas Linn. extracts were evaluated -against the eggplant mealy bug, Ferrisia virgata. One hundred percent (100%) mortality of F. virgata was attained 54 hours after application in all treatments with J. curcas. A mixture of 2 ml extract plus 50 ml distilled water showed significantly highest insect mortality 6, 12, and 18 h after treatment. Changes in color from whitish to yellowish and eventually to dark brown; shrinkage of the body; and straightening of the legs were some of the observable postmortem characteristics of mealy bugs after treatment with the extracts.
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References
de Padua, L. S. and J. V. Pancho. 1989. Handbook on Philippine Medicinal Plants. University of the Philippines at Los Bafios, Laguna. 4:31.
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Copyright (c) 1999 Miraflor B. Sabillo, Edito B. Sumile
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