两种杀菌剂和杀虫剂复配制剂对小麦主要病虫害的防治效果评价

Field effects of two fungicide-insecticide mixtures on major wheat diseases and pests

对室内筛选出来的2种三唑类杀菌剂与吡虫啉的复配剂及其组分单剂的田间防治效果进行了比较,结果显示:复配剂A对小麦叶锈病、白粉病和小麦蚜虫的防治效果分别为90.18%、91.21%和99.06%;复配剂B对上述小麦病虫的防治效果分别为89.58%、92.47%和98.71%。复配剂的防治效果优于三唑酮和戊唑醇田间推荐浓度下对小麦叶锈病(84.89%、88.68%)和小麦白粉病(90.24%、90.54%)的防治效果,低于烯唑醇田间推荐浓度下对小麦两病的防治效果90.59%、92.31%;复配剂与吡虫啉在田间推荐浓度下对小麦蚜虫的防治效果97.55%持平。试验结果表明复配剂A与复配剂B在田间具有良好的防治效果,可以作进一步的试验,以期得到大面积推广。

A comparative study on the effects of two triazole fungicides mixed with imidacloprid and their components on main wheat diseases and pests was carried out in fields. The results showed that the two mixtures had a good control efficacy on wheat rust, powdery mildew and wheat aphids. The control efficacy on wheat rust, pow- dery mildew and wheat aphids of Mixture A was 90.18%, 91.21% and 99.06%, respectively, compared with that of Mixture B at 89.58%, 92.47% and 98.71%, respectively. The control efficacy of the two mixtures on wheat rust and powdery mildew was higher than that of triadimefon （84.89% and 90.24%） and tebuconazole （88.68% and 90.54%）, but lower than that of diniconazole （90.59% and 92.31%） at the recommended dose levels. On wheat aphids, the two mixtures and imidacloprid had a fairly good control efficacy. Further experiments are needed to promote large-scale application of these mixtures.