40%灭虫净防治水稻多种害虫示范

Effect of 40% Miechongjin on Rice Pests

示范结果表明 ,每公顷用 12 0 0ml灭虫净防治稻飞虱 ,药后 7、14、2 1d ,防效分别为 91%、98.63 %和 95 .67%,防治稻纵卷叶螟 ,施后 7d和 14d调查卷叶率分别为 0 .3 %和 0 .5 5 %,而空白对照区为 1.3 2 %和 2 .69%;防治三化螟 3代药后 14d和 2 1d调查 ,螟害率分别为 0 .19%和 0 .5 7%,空白对照区分别为 5 .95 %和 6.49%,其防效分别为 96.81%和 91.2 2 %。 40 %灭虫净对三虫的防治均控制在防治指标之下。

The control efficiency of 1200 ml Miechongjin per hectare on rice planthopper was 91%, 98.63% and 95.67% in the seventh, fourtenth and twenty-first day after sprayed; on rice leaf folder, 0.3% and 0.55% of leaf folder rate in the seventh and fourteenth day compared with 1.32% and 2.69% of check material; on yellow rice borer, 0.19% and 0.57% of its damage rate in the fourteenth and twenty-first day compared with 5.95% and 6.49% of check material. The application of 40% Miechongjin could keep three pests from demaging rice plant.