油菜蚤跳甲药剂防治试验

选用6种药剂，采用拌种、拌种+喷雾、喷雾3种施药方法，在甘肃省康乐县进行了双低春油菜田间油菜蚤跳甲防效比较试验，以油菜被害指数表示药剂的防治效果，选出适宜药剂与施药方法。结果表明：拌种处理中，毒死蜱被害指数最低（2~3叶期4.15%、4~5叶期20.38%、5~6叶期32.08%），氰戊•马拉松、甲维盐次之；拌种+喷雾处理中，氰戊•马拉松（1.83%、15.84%、25.16%）、甲维盐（6.20%、29.25%、29.24%）防效最佳，吡虫啉次之；喷雾处理中，氰戊•马拉松（5.24%、18.79%、29.17%）最佳，甲维盐、吡虫啉次之。氰戊•马拉松、辛硫磷、毒死蜱、甲维盐拌种、拌种+喷雾，甲维盐喷雾将最终死苗率控制在5%以内，大田示范试验中被害指数控制在40%以内，有效控制了对油菜的为害。由此，可以用毒死蜱、氰戊•马拉松、甲维盐、吡虫啉替代高毒农药甲拌磷防治油菜蚤跳甲。其中吡虫啉、甲维盐适宜喷雾，毒死蜱适宜拌种，氰戊•马拉松拌种或喷雾均适宜。

Chemical control experiments on Psylliodes punctifrons on spring rape

Experiments were conducted to compare the control effects of Psylliodes punctifrons Baly by 6 pesticides and three methods(seed dressing,seed dressing+spraying,spraying) in double-low rape fields in Kangle County of Gansu Province.The results showed that,with seed dressing,chlorpyrifos produced the lowest damage index,followed by fenvalerate-malathion and emamectin benzoate-chlorfenapyr.Through seed dressing+spraying,fenvalerate-malathion,and emamectin benzoate-chlorfenapyr had the best effects,followed by ...