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2014年从海南省4个市(县)分离获得43株橡胶炭疽病菌,进行病原菌鉴定后,采用菌丝生长速率法,测定了其对多菌灵和咪鲜胺的敏感性,结果表明:供试菌株中,有23个属于胶孢炭疽病菌,20个属于尖孢炭疽病菌。所有供试菌株对多菌灵和咪鲜胺的EC_(50)值分布范围分别为(0.332 3~7.425 6)和(0.009 1~0.113 3)mg·L~(-1),平均值分别为(1.714 1±1.684 7)和(0.036 8±0.023 8)mg·L~(-1)。其中尖孢炭疽病菌对多菌灵的EC_(50)值要显著高于胶孢炭疽病菌,EC_(50)平均值分别为(2.922 7±1.556 3)和(0.663 2±0.194 4)mg·L~(-1),但2种病原菌对咪鲜胺的EC_(50)值没有显著差异,EC_(50)平均值分别为(0.038 3±0.015 2)和(0.035 5±0.020 1)mg·L~(-1)。供试菌株对多菌灵和咪鲜胺的敏感性无显著相关性,可以在生产上交替使用。
In 2014, 43 strains of rubber anthracnose were isolated from 4 cities (counties) in Hainan Province. After identification of pathogenic bacteria, their sensitivity to carbendazim and prochloraz was tested by mycelial growth rate method. The results showed that Among the tested strains, 23 belonged to Colletotrichum gloeosporioides and 20 belonged to Colletotrichum gloeosporioides. The EC50 values of carbendazim and prochloraz in all tested strains ranged from (0.332 3 to 7.425 6) and from 0.009 1 to 0.113 3 mg · L -1, respectively. The average values were (1.714 1 ± 1.684 7) and (0.036 8 ± 0.023 8) mg · L -1, respectively. The EC50 values of carbendazim for carbendazim were significantly higher than that for anthracnose, the average value of EC50 was (2.9227 ± 1.556 3) and (0.663 2 ± 0.194 4) mg · L ~ (-1). However, the EC50 values of prochloraz were not significantly different between the two pathogens. The average values of EC50 were 0.038 3 ± 0.015 2 and 0.035 5 ± 0.020 1 mg · L -1, respectively ~ (-1). There was no significant correlation between the sensitivity of carbendazim and prochloraz for the tested strains, which can be used interchangeably in production.