Preliminary Test on Insecticidal Effect of Physic Nut (Jatropha curcas Linn.) Extract Against the Eggplant Mealy Bug (Ferrisia virgata)

Edito  B. Sumile,; Miraflor  B. Sabillo,

Preliminary Test on Insecticidal Effect of Physic Nut (Jatropha curcas Linn.) Extract Against the Eggplant Mealy Bug (Ferrisia virgata)

Discipline: Food and Beverage Production

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.

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.
Solsoloy, A. D. J 992. The effect of the insecticidal properties from physic nut, (Jatropha curcas Linn.) on cotton bollworm, (Helicoverpa armigera Hubner) and flower weevil (Amorphodea lata Motch). Ph.D. Dissertation. University of the Philippines at Los Bafios, Laguna, Philippines. 180 pp.
Solsoloy, A. D. and T. S. Solsoloy. 1996. Pesticidal potential of some indigenous plants against cotton pests. Paper presented during the International Workshop on Botanical Pesticides. July 30-31. PCARRD, Los Baños, Laguna, Philippines. 25 pp.