不同杀虫剂对蛴螬的防治效果

Control Effects of Different Insecticides on Grub

以大豆品种沧豆6号为试材,采用毒土法,进行了30%辛硫磷微囊悬浮剂15000 g/hm2、30%毒死蜱微囊悬浮剂7500 g/hm2、40%辛硫磷乳油15000 g/hm2和48%毒死蜱乳油7500 g/hm2田间防治蛴螬效果的比较试验。结果表明:4种杀虫剂对蛴螬的防治效果顺序为30%辛硫磷微囊悬浮剂15000 g/hm2(88.67%)>30%毒死蜱微囊悬浮剂7500 g/hm2(70.00%)>40%辛硫磷乳油15000 g/hm2(17.33%)>48%毒死蜱乳油7 500 g/hm2(2.67%);从不同剂型对蛴螬的防治效果来看,微囊悬浮剂显著>乳油,且30%辛硫磷微囊悬浮剂的持续期较长,药效可达90 d以上。其中2种微囊悬浮剂处理的大豆产量也显著>2种乳油处理,充分显示出了微囊悬浮剂的良好杀虫效果。30%辛硫磷微囊悬浮剂可有效地防治大豆蛴螬,且持效期长,是防治蛴螬的理想药剂。

The control effects of different concentrations and different forms of phoxim and chlorpyrifos on were studied in soybean field. The results showed that the control effects of 30% phoxim CS 15 000 g/hm2, 30% chlorpyrifos CS 7 500 g/hm2, 40% phoxim EC 15 000 g/hm2 and 48% chlorpyrifos EC 7 500 g/hm2 was 88.67% , 70. 00% , 17.33% and 2.67% , respectively. The control effect of capsule suspension was significantly higher than that of emulsifiable concentrate. The yield of soybean with capsule suspension was significantly higher than that with emulsifiable concentrate. The persistent period of 30% phoxim CS reached more than 90 days, which was ideal agent for controlling grub.