摘要
在四月省秀山县的一季杂交中稻田,采用选择性化学药剂控制不同病虫——白背飞虱、褐稻虱、稻纵卷叶螟和纹枯病,进行病虫复合危害损失测定,结果表明:稻飞虱危害后每穗实粒数减少,千粒重降低;稻纵卷叶螟使结实率和有效穗减少;纹枯病主要影响结实率。经分析,发现褐稻虱和稻纵卷叶螟或纹枯病和稻纵卷叶螟共同危害,对产量损失有负的互作效应;纹枯病和稻飞虱之间有正的互作效应。
To Study on damage of rice planthopper (BPH and WBPH) , leaffoIder(LE) and sheath blight(ShB) to rice, a experiment was conducted by using selected chemical pesticide for controlling different pests of single cropping rice in Xiushan County, Sichuan. The results showed that filled-grain numbers/panicle and 1000-grain weight, setting percent and productive panicle numbers, and filled grain percent were decreased with damage by planthopper, LF, and ShB separately. There were an negative interaction effect of damage in both of LE and BPH or ShB on rice yield, and an positive interaction effect of damage in both ShB and planthoppcrs.
出处
《西南农业学报》
CSCD
1992年第1期47-52,共6页
Southwest China Journal of Agricultural Sciences
关键词
水稻
病虫害
产量损失
发生
为害
Rice pests, Yield loss, Interaction effect.
