几种常见药剂防治水稻二化螟田间药效试验

Field Efficacy Test of Six Common Insecticides Against Rice Stem Borer(Chilo suppressalis Walker)

为了筛选防治水稻二化螟的高效农药,对目前市场上6种常见的杀虫剂进行田间药效试验。结果表明:200 g/L氯虫苯甲酰胺悬浮剂10 mL/667m2和25%呋虫胺可湿性粉剂40 g/667m2防治效果好,持效长,最高防效分别可达94.81%和92.70%。2%甲氨基阿维菌素苯甲酸盐微乳剂60 mL/667m2速效性较高,15 d防治效果达到86.71%,防治效果较好;1.8%阿维菌素微乳剂40 mL/667m2持效期短,25 d的防治效果达到83.75%,35 d后防治效果仅为77.31%,防治效果一般;240 g/L甲氧虫酰肼悬浮剂30 mL/667m2和150 g/L茚虫威悬浮剂20 mL/667m2对水稻二化螟防治效果较差。

Six common insecticides sold on the market presently were used in the field efficacy test against rice stem borer(Chilo suppressalis Walker)for selecting highly efficient ones.The results showed that 200 g/L chlorantraniliprole SC(150 mL/hm^2)and 25%dinotefuran WP(600 g/hm^2)had good and lasting control effects on rice stem borer;the highest efficacy of the two insecticides was 94.81%and 92.70%,respectively.2%emamectin benzoate ME(900 mL/hm^2)had a rapid control effect,its efficacy reached 86.71%at 15d after application.1.8%avermectin ME(600 mL/hm^2)had a relatively short efficacy period,its efficacy reached 83.75%at 25d after application,but 35d after application,its efficacy was only 77.31%.240 g/L methoxyfenozide SC(450 mL/hm^2)and 150 g/L indoxacarb SC(300 mL/hm^2)had relatively low control effects on rice stem borer.