10%溴氰虫酰胺OF对水稻稻纵卷叶螟的田间药效评价

Efficacy Evaluation of Cyantraniliprole 10% OF against Cnaphalocrocis medinalis Guenée

[目的]明确10％溴氰虫酰胺油悬浮剂对稻纵卷叶螟的防治效果及使用剂量。[方法]采用田间茎叶喷雾法检测防治效果，以邓肯氏新复极差法检验差异显著性。【结果】10％溴氰虫酰胺油悬浮剂20～40ga．i．mm^2剂量处理，药后15d，保叶效果85．80％-90．60％，防虫效果90．55％-94．24％，与20％氯虫苯甲酰胺悬浮剂30ga．i．／hm^2的防效相当，比40％毒死蜱乳油600ga．i．／hm^2的防效好。【结论】10％溴氰虫酰胺油悬浮剂1）．220-40ga．i．／hm^2剂量处理能有效控制稻纵卷叶螟的为害，可以在生产上推广应用。

[Aims] The aims of the research is to confirm the efficacy and the optimum dosage of cyantraniliprole 10% OF on controlling Cnaphalocrocis medinalis Guen6e in rice field. [Methods] Using the method of field spray on stems-leaves of rice, the efficacy of cyantraniliprole 10% OF against C. medinalis was determined. And the Duncan＇s new multiple range test （DMRT） was used to analyze and test the significance of differences. [Results] On the 15th day after treatment with dosage of 20-40 g a.i./ha of cyantraniliprole 10% OF, the protective effect on rice leaves was 85,80-90.60%, the insecticidal effect on larvae of C. medinalis was 90.55-94.24%. The results indicated that there were no significant difference of efficacy between the cyantraniliprole and the chlorantraniliprole 20% SC of 30 g a.i./ha. But compared with the chlorpyrifos 40% EC of 600 g a.i./ha, the cyantraniliprole performed better control effect on the C. medinalis. [Conclusions] The dosage of 20-40 g a.i./ha of cyantraniliprole 10% OF could effectively control the damage by C. medinalis, it can be applied and extended in rice to guarantee the safety of grain production..