烟草大田期病害配方施药试验

PRELIMINARY STUDY ON MIXTURE OF GERMICIDES IN CONTROL OF TOBACCO DISEASES

鉴于云南烟区大田期烟草病害混合发生日趋严重,单一农药品种防效较差的状况,作者选用云南烟区几个常用农药品种,根据田间病害组成相和农药理化性质,提出了烟草配方施药方案,并进行了田间小区试验和同田对比试验。小区试验结果表明:909—B1混配剂对烟草赤星病平均防效为71.1％,对烟草蛙眼病、炭疽病、角斑病等叶斑类病害的平均防效为81.3％,对烟草野火病平均防效为80.9％。同田对比试验与小区试验结果基本相同,表明配方施药对真菌、细菌病害有较好的防治效果,尤其是909—B1明显优于其他供试农药品种。

Mixtures of germicides for the control of tobacco diseases was tested based on the types, the occurrence and the development of the diseases in tobacco fields. The plot trial of different mixtures and the trial of comparison with other germicides normally used to control tobacco diseases within the same field were conducted. The results indicated that mixtures were more effective than other individual chemicals to both the fungal and the bacterial diseases in tobacco field. A mixture 909-B1 showed the best effect in the trials.