Study on Fungicide Screening for Un-pollutive Control of Grape Downy Mildew and Its Control Techniques

The control effects of 6 commonly-used effective fungicide varieties(Dimethomorph,Azoxystrobin and so on) against grape downy mildew in the field were tested.The results indicated that Dimethomorph,Azoxystrobin and Propineb had better prevention and control effects on the occurrence of grape downy mildew.The other 3 kinds of fungicides could be used as the alternative fungicides in order to delay the resistance of its pathogen to the fungicides.Simultaneously,according to the occurrence characteristics of grape downy mildew,the integrated prevention and control techniques of this disease were put forward.