Repellency of Volatile Organic Chemicals of Kakawate, Gliricidia sepium (Jacq.) Walp., to Rice Green Leafhopper, Nephotettix virescens (Distant) (Hemiptera: Cicadellidae)

摘要

The behavioral and olfactory responses of male and female rice green leafhopper (GLH), Nephotetdx virescens (Distant), an important vector of tungro, was studied to elucidate the mechanism for reduced green leafhopper populations in rice with kakawate (Gliricidia sepium (Jacq.) Walp.) trees growing near rice fields as observed by farmers. The methods include leaf disc assay to determine possible effect of organic chemical volatiles and the Y-tube olfactometric bioassays to be able to pinpoint the specific organic component(s) among the headspace volatiles responsible for the repellent property of kakawate.