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为明确30%抑食.毒死蜱可湿性粉剂防治三代稻纵卷叶螟的效果,设750、900、1 050、1 200 mL/hm24种剂量,药后15 d调查,束叶防效分别为71.9%、76.8%、81.8%、88.7%;控虫效果分别为71.8%、78.2%、83.3%、88.5%。试验结果表明,应用30%抑食.毒死蜱防治水稻三代纵卷叶螟效果较好,一般1 050 mL/hm2用药剂量即可起到较好防效;发生量大时,则要将用药剂量提高到1 200 mL/hm2以上。
In order to clarify the effect of 30% inhibition of chlorpyrifos wettable powder on the prevention and control of the three generations of rice leaf roller, with doses of 750,900,1 050,1 200 mL / hm, after 15 days of drug investigation, the leaf bundle control effect was 71.9 %, 76.8%, 81.8% and 88.7% respectively. The control effects were 71.8%, 78.2%, 83.3% and 88.5% respectively. The results showed that the application of 30% inhibition of chlorpyrifos to control the three generations of rice leafroller better effect, the general dose of 1 050 mL / hm2 can play a good control effect; large amount, then the dose should be increased To 1 200 mL / hm2 or more.