Screening and evaluation of synergistic combination for strawberry anthracnose control
The indoor toxicity of five fungicides against strawberry anthracnose pathogen was measured using the mycelial growth rate method.Two fungicides with excellent effect were compoun-ded to screen the synergistic ratios,and the control effect with the maximum co-toxicity coefficient was verified in greenhouse.The results showed that both difenoconazole and pyraclostrobin exhibited good inhibitory effects on strawberry anthracnose,and the EC50 values were 0.80 mg/L and 6.33 mg/L,respectively.The synergistic coefficients of difenoconazole and pyraclostrobin were 0.70 and 1.51,respectively.The co-toxicity coefficient of 2:1 ratio was the best.In greenhouse,diluted 1 500～2 000 times with a 30％difenoconazole·pyraclostrobin suspension(pyraclostrobin and difenoconazole 2:1)and treated with root dipping during transplantation had a good control effect on strawberry anthracnose and had no negative impact on strawberry growth.
NETL
NSTL
万方数据
