| Insecticidal test on Empoasca vitis was carried out by using water-extracts of four invasive plants (Mikania micrantha,
Lantana camara, Trilobate Wedelia and Ipomoea cairica) and their mixtures with biphenyl chrysanthemum ester in the tea gardens. Results showed that water extracts of 1 g/mL water extract from M. micrantha and L. camara had the best expulsive effects on E. vitis, and control effect of mixed liquor with 1 g/mL M. micrantha water-extract and 20 mL 2.5% biphenyl chrysanthemum ester (diluted 900 times) was equal to that of 35 mL 2.5% biphenyl chrysanthemum ester (diluted 900 times). Control effects of four water-extracts on E. vitis from strong to weak was as follows: M. micrantha, L. camara, T. wedelia, I. cairica. |
