6%吡蚜酮·氯虫苯甲酰胺缓释剂对二化螟和稻纵卷叶螟的防效研究

Control Effect of 6%Pymetrozine Chlorantraniliprole Sustained Release on Chilo Suppressalis and Rice Leaf Roller

为有效防治衡阳县稻田二化螟和稻纵卷叶螟,对6%吡蚜酮·氯虫苯甲酰胺GR进行了田间药效试验,并以50%吡蚜酮WG和20%氯虫苯甲酰胺SC进行了对比分析。结果表明,6%吡蚜酮·氯虫苯甲酰胺GR有效成分量在630、720g(ai)/hm^(2)时,仅需施1次药对水稻二化螟和稻纵卷叶螟均有着较好的防治作用;与需要施2次药的对照药剂20%氯虫苯甲酰胺SC无显著性差异,而50%吡蚜酮WG对二化螟和稻纵卷叶螟无防效。6%吡蚜酮·氯虫苯甲酰胺GR具有防效时间长、防治成本低的特点,大田防治时,建议选择有效成分量为630g(ai)/hm^(2)的6%吡蚜酮·氯虫苯甲酰胺GR防治二化螟和稻纵卷叶螟。

In order to control striped rice borer and rice leaf roller in Hengyang County,6%pymetrozine/Chlorantra⁃niliprole sustained release agent was tested and compared with 50%pyraphid WG and 20%chlorfenoxamide SC.The results showed that the effective components of 6%pymetrozine/chlorantraniliprole sustained release agent at 630 and 720g(ai)/hm^(2) had a good control effect on rice stem borer and rice leaf roller,which was not significantly dif⁃ferent from the control agent 20%chlorfenoxamide SC,but 50%pyraphid WG had no control effect on rice stem bor⁃er and rice leaf roller.Therefore,6%pymetrozine/chlorantraniliprole sustained release agent has the characteristics of long control time and low control cost.In field control,6%pymetrozine/chlorantraniliprole sustained release agent with an effective component of 630g(ai)/hm^(2) is recommended to control chilo suppressalis and rice leaf roller.