Abstract
Post-harvest waste of local cardamom plants (Amomum cardamomum Wild.) such as stem and leaves have no economic value but potential as a bioinsecticide. It was known to contain insecticidally active ingredients. This study aimed to analyze the behavioral response of adult Sitophilus oryzae, L. under two shapes extract frompost-harvest wasteof local cardamom as the repellent control. Four doses, ranging from 25% to 100% of each treatment were tested using Y- tube olfactometer.The behavioral responsewas observed by the PreferenceIndex(PI) value and Percentage of Repellency (PR). The PI value was analyzed descriptively, while PR was analyzed by two way ANOVA. The data show that PI value is negativeat 75 and 100% doses both of cardamom plant.PR values were significantly under difference of doses and shape,whilethe optimally doses at 100% (LSD; α<0.05).PRvalue of extract was 57.6%, higher than the powder which was only 52.8%. It is found that rice weevil adult has the ability to respond behaviorally to post-harvest waste of local cardamom plants, but extract shape is more effective than powder. This study provides positive information about the potential that post-harvest waste of local cardamom as an economically-value bioinsecticide.
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