4种药剂对水稻跗线螨的防治效果研究

Control Efficacy of Pesticides against Steneo tarsonemus sp.of Rice

近年来,水稻跗线螨在珠三角地区晚稻中发生越来越严重,为控制该螨对水稻的危害,设计并开展4种药剂防治试验。试验结果表明:虫螨净对于跗线螨防治效果明显。跗线螨的防治须做好预测预报工作,其最佳防治时期为拔节期和破口期两次用药。

In recent years, the occurrence of Steneo tarsonemus sp. of late rice became more and more serious in Pearl River Delta. To control the damage of tarsonemid mites to rice, an experiment was designed and conducted to test the effects of several pesticides against tarsonemid mites. Results showed that： The pesticide CHONGMAN JING had a significant prevention and control effect on Steneo tarsonemus sp., which proved it could be applied to rice growth. The key to the prevention and control lied in the prediction and forecast. Once the symptoms（after the earring stage）, the effect of pesticide would be discounted. So the optimum prevention time were the full stem and break stages.