八种杀虫剂对稻瘿蚊的田间防治效果初报

为探索出某种对水稻稻瘿蚊的效果不亚于益舒宝，但更经济、安全的杀虫剂。在大田中，以毒土施药法用八种杀虫剂及其混配剂对稻瘿蚊进行了试验。20d对稻瘿蚊控制效果最好的是益舒宝1800g ai/hm2(下同)，和三唑磷1500g，防效高于97%；其次是阿维菌素21.6g及吡虫啉120g，防效达92%；锐劲特45g、乐斯本1440g、灭蝇胺840g的效果84%~90%；杀虫单2700g的效果仅52.5%。“益舒宝900g+三唑磷750g”，“益舒宝600g+三唑磷1050g”，及“益舒宝600g+阿维菌素15.2g”混用的防效可达100%。用三唑磷1500g ai/hm2以上剂量，完全可以控制稻瘿蚊的为害。

Preliminary Report on the Control Effect of Eight Insecticides Against Orseolia oryzae Wood Maspn

To search for an insecticide that the controlling effect is the same as ethoprophos，but more economical, and safer than ethoprophos against Orseolia oryzae Wood Maspn, eight kinds of insecticides and their mixture were tested by applying toxic soil in the field. The results showed that, 20 days after single application, ethoprophos (1800 g ai/hm2) and triazophos (1500g) were the best with effect more than 97%, followed by abamectin (21.6g) and imidacloprid (120g) with effect more than 92%, and then fipronil (45g)，chlorpyrifos (1440g) and cyromazine (840g) with effect between 84%~90%, while the insecticide monosultap ((2700g) was only 52.5% effective. The results also indicated that when applying the mixture of ethoprophos (900g)+triazophos (750g), ethoprophos (600g)+triazophos (1050g), or ethoprophos (600g)+abamectin (15.2g), the controlling effect was 100%. It was concluded that triazophos at the dosage above 1500g can completely prevent the attack by Orseolia oryzae Wood Maspn.