氟虫腈替代药剂的田间筛选试验

Field Screening Experiments for the Substituted Agrochemicals of Fipronil

进行氟虫腈替代药剂的田间筛选试验。小区试验结果表明:药后10d,15%阿维菌素·毒死蜱EC900mL/hm2、48%毒死蜱EC1200mL/hm2、25%吡蚜酮WP300g/hm2对褐飞虱的防效分别为89.3%、82.2%、83.4%,对灰飞虱的防效分别为90.1%、85.4%、86.2%。药后15d,15%阿维菌素·毒死蜱EC900mL/hm2、48%毒死蜱EC1200mL/hm2、1.8%阿维菌素EC1500mL/hm2和1%甲氨基阿维菌素苯甲酸盐EC1500mL/hm2对稻纵卷叶螟的保叶效果分别为97.7%、87.2%、97.5%、98.1%,杀虫效果分别为98.8%、89.8%、100%、100%。示范试验表明:药后10d,15%阿维菌素·毒死蜱EC900mL/hm2和48%毒死蜱EC1200mL/hm2对稻飞虱的防效分别为78.4%和76.9%;对纵卷叶螟的保叶效果分别为84%和80.7%,杀虫效果分别为87.6%和80.4%。阿维菌素·毒死蜱和毒死蜱可作为氟虫腈兼治稻飞虱和纵卷叶螟的替代药剂,吡蚜酮可作为氟虫腈防治稻飞虱的替代药剂,阿维菌素和甲氨基阿维菌素苯甲酸盐可作为氟虫腈防治稻纵卷叶螟的替代药剂。并就几种替代药剂的合理使用进行了探讨。

Field screening experiments for the substituted agrochemicals offipronil were tested. When avermectins＇dursban 15% EC applied at 900 mL/ha, dursban 48% EC at 1200 mL/ha and pymetrozine 25% WP at 300 g/ha in field plot trials respectively, they provided control efficacy 89.3, 82.2 and 83.4% against brown planthopper and 90.1, 85.4 and 86.2% against small brown planthopper at 10 d after application, respectively. At 15 d after application against rice leaf roller, avermectins.dursban 15% EC at 900 mL/ha, dursban 48% EC at 1 200 mL/ha, avermectins 1.8% EC at 1500 mL/ha and emamestin benzoate 1% EC at 1500 mL/ha, the leaf protection efficacy was 97.7, 87.2, 97.5 and 98.1%, the control efficacy was 98.8, 89.8, 100 and 100%, respectively. When they were used at the same dosage in field demonstration trials, at 10 d after application avermectins＇dursban and dursban provided the control efficacy against planthopper was 78.4 and 76.9%, while against rice leaf roller the leaf protection efficacy was 84 and 80.7%, the control efficacy was 87.6 and 80.4%, respectively. The results showed that avermectIns.dursban and dursban may be the substituted agrochemicals of fipronil to both planthopper and rice leaf roller, pymetrozine may be the substituted agrochemicals of fipronil to single planthopper, avermectins or emamestin benzoate may be the substituted agrochemicals of fipronil to single rice leaf roller. In addiiton, the techniques of the above-mentioned agrochemicals used in field was discussed.