Abstract—Insects are known as pests at home which can lower the quality of food for human. There are insects that destroy the quality of farm harvest, thereby decreasing its palatability and marketability. One of the very well- known insects pests is the rice weevils (Sitophilus oryzae) which damages the quality of rice grain and lowers its market value. This study seeks to find out what concentration of Jackfruit Peel Ethanol Extract (JPEE) will give the highest mortality in 1.2 hours of observation. Experimental research method with four treatments, and twenty (rice weevils) samples/treatment, was used to gather pertinent data on this study. Jackfruit Peel was oven dried, grounded, macerated in 70% ethanol for 3 days and subjected to rotary evaporation. Different concentrations of Jackfruit Peel ethanol extract, (JPEE) was done. T- (control), 0% JPEE, T₁, 25% JPEE, T₂, 50% JPEE and T₃, 75% JPEE. Data on mortality for 1.2 hours with 20 minutes interval, was analyzed using Analysis of Variance and Fisher Least Significant Difference (LSD) Test as post hoc Test. Result revealed significant difference on the means of four treatments. It is imperative that rice weevils in T₃ (750% of Jackfruit Peel Ethanol Extract) gave highest mortality in 1.2 hours, when exposed to JPEE. ANOVA revealed significant difference at 5% level of significance. Fisher LSD showed significant difference on control and treatments with JPEE. No significant differences exist among treatment with JPEE, which implies that any of the three treatment with JPEE can control rice weevils at 1.2 hours of observation. It shows that JPEE is a potential source of insecticide particularly for rice weevils.

Index Terms—Jackfruit peel, rice weevils, (Sitophilus oryzae).

Liwayway H. Acero is with Department of Natural Sciences, College of Arts and Sciences, San Beda University Manila Philippines (email: lilyacero1@yahoo.com).

Cite: Liwayway H. Acero, "Insecticidal Property of Jackfruit (Artocarpus heterophyllus) Peel Ethanol Extract against Rice Weevils (Sitophilus oryzae)," International Journal of Bioscience, Biochemistry and Bioinformatics vol. 9, no. 3, pp. 158-165, 2019.