【摘要】 在实验室条件下,采用菌丝生长速率法,研究10种杀菌剂对葡萄黑痘病菌的抑菌活性。结果表明,甲基托布津、百菌清的M IC>1 000 mg.L-1,代森锰锌、退菌特和多菌灵的EC50值分别为6.9723、8.9088和11.1764 mg.L-1,科博、大生M-45的EC50值为3.8875、5.0846 mg.L-1,使百克、世高、福星的EC50值为0.5942、0.6524和0.7213 mg.L-1。使百克、世高和福星对葡萄黑痘病菌的抑菌活性强,科博、大生M-45其次,代森锰锌、退菌特、多菌灵的抑菌活性较弱,甲基托布津、百菌清极弱。联合毒力测定结果表明,使百克与世高1∶1、1∶2、1∶3、1∶4比例复配的CTC均大于100,说明使百克与世高各配比复配,对葡萄黑痘病菌具有很强的抑制活性,其中使百克∶世高=1∶4的比例复配抑菌活性最强,且有较明显的增效作用;使百克与福星1∶1、1∶2、1∶3、1∶4比例复配的CTC为70~100,说明使百克与福星各配比复配,对葡萄黑痘病菌具有较强抑菌活性,但无明显增效作用。更多还原

【Abstract】 Under the condition of laboratory,inhibitive activities of 10 kinds of fungicides to the pathogenic fungus of Grape Black Pox were tested by means of mycelium growth rate method,respectively.The results showed that MIC of thiophanate-methyl and chlorothalonil were over 1 000 mg·L^-1.EC₅₀ of mancozeb,tuzet and carbendazim were 6.9723,8.9088 and 11.1764 mg·L^-1,respectively.EC₅₀ of cuprofix and dithane M-45 were 3.8875 and 5.0846 mg·L^-1,respectively.EC₅₀ of prochloraz,difenoconazole,nustar were 0.5942,0.6524 and 0.7213 mg·L^-1,respectively.The result mentioned above suggested that prochloraz,difenoconazole,nustar all had a good inhibitive effect on Sphaceloma ampelinum.Next were cuprofix and dithane M-45.CTC values of the mixtures of prochloraz and difenoconazole with different mixing ratio of prochloraz to difenoconazole were over 100,respectively.The results indicated that the mixtures of prochloraz and difenoconazole had significant additive effect on Sphaceloma ampelinum.The best matching ratio of prochloraz and difenoconazole was 1∶4.CTC values of prochloraz and nustar with different mixing ratio of prochloraz to nustar were from 70 to 100.The result showed that the mixtures of prochloraz to nustar had not significant additive effect.更多还原