王有贤 王卓 臧连生 侯玉发

摘要 [目的]评估乙基多杀菌素和甲氧虫酰肼悬浮剂混配对吉林省水稻二化螟的田间防治效果。[方法]二化螟幼虫孵化高峰期，在长春和吉林2个地区田间施用不同混配浓度的乙基多杀菌素和甲氧虫酰肼悬浮剂，以20%氯虫苯甲酰胺悬浮剂为对照药剂，在水稻分蘖期和成熟期调查枯心率、白穗率和虫伤株率。[结果]与20%氯虫苯甲酰胺悬浮剂相比，2个地区施用各混配浓度乙基多杀菌素与甲氧虫酰肼悬浮剂对二化螟为害造成的枯心率、白穗率和虫伤株率均无显著差异，使用各混配浓度药剂后，对二化螟为害造成的枯心的防治效果为75.0%～100%，对白穗的防治效果为75.6%～94.9%，对虫伤株的防治效果为62.5%～91.9%。[结论]乙基多杀菌素与甲氧虫酰肼混配可有效控制吉林省水稻二化螟造成的为害，田间应用乙基多杀菌素与甲氧虫酰肼混配防治二化螟的推荐使用剂量为（267.0+333.0）ml/hm2。

关键词 乙基多杀菌素；甲氧虫酰肼；水稻二化螟；田间防效

中图分类号 S482.2 文献标识码 A 文章编号 0517-6611（2014）31-10922-02

Study on the Effects of Mixtures of Spinetoram and Methoxyfenozide against the Rice Stem Borer， Chilo suppressalis Walker

WANG Youxian1， WANG Zhuo2， ZANG Liansheng2* et al

（1. Agricultural Bureau of Jiaohe， Jiaohe， Jilin 132500； 2. Institute of Biological Control， Jilin Agricultural University， Changchun， Jilin 130118）

Abstract [Objective] The aim was to evaluate the field control efficacy of mixtures of spinetoram and methoxyfenozide on the rice stem borer， Chilo suppressalis Walker. [Method] At the peak of hatching period for C. suppressalis， six mixtures of spinetoram and methoxyfenozide were sprayed in paddy field in Changchun and Jilin. Chlorantraniliprole 20% SC was used as control pesticide. Percentages of dead heart， white head and damaged plants were investigated at rice tillering and mature stages. [Result] Five mixture treatments have similar percentages of dead heart， white head and damaged plants to Chlorantraniliprole in Changchun and Jilin. After spraying various mixture pesticides， and the corrected control efficacies for dead hear， white head and damaged plants were 75.0%-100.0%， 75.6%-94.9% and 62.5%-91.9%. [Conclusion] The mixtures of spinetoram and methoxyfenozide can successfully suppress the damage by C. suppressalis. The mixture of 267.0 ml spinetoram and 333.0 ml methoxyfenozide/hm2 is recommended to control the rice stem borers in Jilin Province.

Key words Spinetoram； Methoxyfenozide； Chilo suppressalis； Field control efficacy

二化螟（Chilo suppressalis Walker）屬鳞翅目（Lepidoptera）螟蛾科（Pyramidae），俗称钻心虫、蛀心虫，是吉林省水稻主产区最重要的常发性害虫，以幼虫钻蛀稻茎为害，在分蘖期蚁螟群集水稻叶鞘内为害造成枯鞘，钻蛀稻茎为害时增加无效分蘖和枯心，孕穗期造成死孕穗，抽穗期造成白穗，成熟期造成虫伤株，增加瘪粒，每年可造成产量损失5%～30%^[1]。此外，该虫还为害玉米、粟、高粱等作物。近年来该虫危害呈现加重趋势，一些常规药剂防治效果明显下降，随着用药量的增加，对环境和生态也造成严重污染，生产中迫切需要低毒、低残留的农药品种。……