Field control efficacy of several fungicides against downy mildew of Corydalis turtschaninovii
[Aims]This study aims to screen out safe and efficient fungicides against downy mildew of Corydalis turtschaninovii.[Methods]The field plot trial was carried out to determine the field control efficacy of 8 fungicides against downy mildew of C.turtschaninovii and the safety to it with designed dosage.[Results]The eight tested fungicides had no obvious effect on the growth of C.turtschaninovii,and three fungicides showed good control effects on downy mildew.The control efficiency of fluopicolide·cymoxanil 70％WG,mandipropamid 23.4％SC and propamocarb hydrochloride 722 g/L AS were 83.3％,78.5％and 73.6％,respectively.Three frequently used fungicides in the production cyazofamid 100 g/L SC,fosetyl-aluminium 80％WG and dimethomorph 80％WP performed poorly,with control efficiency of 43.6％,50.9％and 51.3％,respectively.[Conclusions]Fluopicolide·cymoxanil 70％WG and mandipropamid 23.4％SC,having better control efficacy than propamocarb hydrochloride 722 g/L AS,is recommended for use in the control of downy mildew of C.turtschaninovii.
Corydalis turtschaninoviidowny mildewcontrol effectrate of disessed leaves
万方数据
维普
