The Biological Control Efficacy of the Strains H1 and H2 Against Cucumber Downy Mildew

The control efficacy of H1 and H2 against cucumber downy mildew were studied,the disease index was collected and analyzed based on the plant disease control experiment in field.The results showed both of them had the bio-control efficacy,with 35.28% and 35.75% against cucumber downy mildew,respectively.H1 and H2 strains had not only the significant control efficacy against cucumber powdery mildew,but also the inhibiting ability to cucumber downy mildew.They both had boad-spctrum sterilizing characters.