Toxicity Activity of Artemisia lavandulaefolia DC Essential Oil on Empoasca onukii Matsuda

The potential ofusing Mugwort (Artemisia lavandulaefolia DC) essential oil as an insecticide to control Empoascaonukii Matsuda was examined by means of the pesticide-membranemethod and fumigation in confinement in the laboratory. The essential oil showeda toxic effect by contact on adult green leafhoppers that intensified withincreasing concentration and contact time. The 72-h adjusted mortality rate was77.08% at 8 μL·mL^-1 .As a fumigant, the essential oil also exhibitedan impressive adjusted mortality rate of 96.08% on the insects 24h after thefumigation. The toxicity by fumigation on the insects would increase furtherwith exposure time, as the LC₅₀ could be reduced from 0.082μL·mL^-1 to 0.046μL·mL^-1.