11种生物源杀菌剂对苹果主要病害病原菌的室内毒力测定

采用菌丝生长速率法测定了11种生物源杀菌剂对苹果树腐烂病菌、苹果霉心病菌、苹果斑点落叶病菌以及苹果炭疽病菌的抑制活性。结果表明：3%中生菌素WP对苹果树腐烂病菌、苹果霉心病菌和苹果斑点落叶病菌均有抑制作用,EC50值分别为0.60mg/L、1.84mg/L和1.18mg/L,1%蛇床子素EW对苹果树腐烂病菌和苹果斑点落叶病菌抑制效果较好,EC50值分别为1.52 mg/L和2.65 mg/L,0.3%苦参碱AS只对苹果树腐烂病菌有较好的抑制效果,EC50值为1.0mg/L。因此,3%中生菌素WP、1%蛇床子素EW和0.3%苦参碱AS可作为后续田间药效的首选药剂。

Toxicity Determination on 11 Types of Bio Fungicides for Pathogens of the Main Disease on Apple in Indoor

The inhibitory activity of 11 bio fungicides against Valsa mali, Trichothecium roseum, Alternaria alternata and Glomerella ciningulaia was determined by mycelial growth rate method. The results showed that 3% zhongshengmycin WP had inhibitory effect on V. mali, T. roseum and A. alternata, and the EC50 values were 0.60 mg/L, 1.84 mg/L, and 1.18 mg/L, respectively. 1% osthol EW had inhibitory effect on V. mali and A. alternata, and the EC50 values were 1.52 mg/L and 2.65 mg/L, respectively. 0.3% matrine AS only had inhibitory effect on V. mali, and the EC50 value was 1.0 mg/L. Therefore, 3% zhongshengmycin WP, 1% osthol EW and 0.3% matrine AS could be the first choice for subsequent field trial.