25%高氯·辛微乳剂防治棉铃虫、菜青虫试验

Field Trial of 25% Mxture of Cypermethrin and Phoxim Microemulsion against Cotton Bollworm and Cabbage Butterfly

田间试验结果表明 ,2 5%高氯·辛微乳剂对棉铃虫和菜青虫具有较好的防治效果。用 10 0 0～ 150 0倍液防治棉铃虫 ,药后 5d防效和保蕾效果分别达 79%和 74 %以上 ;用 10 0 0～ 2 0 0 0倍液防治菜青虫 ,药后 7d防效达 94 %以上。与氯氰菊酯和高效氯氰菊酯的防效相当 ,优于常规农药辛硫磷。

The experiment was carried out for measuring effect of 25% mixture of cypermethrin and phoxim microemulsion against cotton bollworm ( Heliothis armigera H) and cabbage butterfly ( Pieris rapae )in field trials. The result showed that the mixture of cypermethrin and phoxim had a good effect to control the two pests. The control effect of the mixture with 1 000～1 500 times dilution to cotton bollworm and the effect on protecting the cotton buds and bolls were about 79% and 74% during 5 day after spraying treatment, and the effect to cabbage butterfly was 94%, which was similar to that by using alphacypermethrin 5 EC or cypermethrin 10 EC and better than that by applying phoxim 40 EC.