35%氯虫苯甲酰胺WG对稻纵卷叶螟防治效果的研究

稻纵卷叶螟是危害水稻生长与产量的三大病虫害之一,本试验以35%氯虫苯甲酰胺为研究药剂,以期测定不同浓度的35%氯虫苯甲酰胺(WG)对稻纵卷叶螟的防治效果。田间药效实验表明:35%氯虫苯甲酰胺(WG)10.5 g/hm2、21.0 g/hm2、31.5 g/hm2 3个浓度对稻纵卷叶螟幼虫均具有防治效果。31.5 g/hm2、21.0 g/hm2防治效果比较理想,药后3 d防效分别为70.25%、74.38%,药后8 d防效分别为90.36%、91.98%。药后13 d防效为95.71%、97.83%,药后18 d防效为83.75%、89.95%。药后30 d的药效依然高于标准药剂,达到46.25%、49.75%。通过试验可以得出35%氯虫苯甲酰胺WG药效持续时间较长,并能减少因虫害造成的水稻产量损失。

35%Chlorantraniliprole WG in Control against Rice Leaf Rollers

Different concentrations of 35%Chlorantraniliprole （WG） against Cnaphalocrocis medinalis in the field efficacy experiments showed that：three concentrations of 35%Chlorantraniliprole （WG） 10.5 g/hm2, 21.0 g/hm2, 31.5 g/hm2 all had preventive and therapeutic effects on rice leaf roller larvae, of which 31.5 g/hm2 and 21.0 g/hm2 had more ideal control effects, with the drug control effects 70.25%and 74.38%, respectively, after 3 days;90.36%and 91.98%, respectively, after 8 days;95.71%and 97.83%, respectively, after 13 days;83.75%and 89.95%, respectively, after 18 days. Even after 30d, the drug efficacy was still higher than the standard, reaching 46.25%and 49.75%, respectively. So, with longer effect duration, this pesticide can reduce the loss of rice yield from insect damage.