辽宁省葡萄炭疽菌鉴定及对多菌灵敏感性研究

葡萄炭疽病已成为辽宁省葡萄生产上的重要病害。经对辽宁省主要葡萄产区24个葡萄炭疽菌株进行病原菌鉴定和采用生长速率法测定了葡萄炭疽菌对多菌灵的敏感性后，结果表明：引起辽宁省不同地区葡萄炭疽病的病原均为胶孢炭疽菌［Colletotrichum gloeosporioides (Penz.) Sacc.］。该病菌对多菌灵的敏感性测定值EC50的范围是0.267 8~2.731 2 μg/mL，平均值1.144 9 μg/mL。根据计算出的供试菌株的抗性系数和敏感性频率分布图所示,大部分菌株的抗药性表现为中抗水平，仅有1个菌株抗性较高，而不同敏感性频率分布呈不规则的正态分布，存在敏感性下降的风险。

Identification of the grape anthracnose and its sensitivity to carbendazim in Liaoning

The grape anthracnose has become an important grape production disease in Liaoning. In the main grape-producing areas of Liaoning, 24 grape strains of anthrax pathogen were identified, and the growth rate method was used to determine the sensitivity of anthrax to carbendazim. The results showed that the grape anthracnose pathogen originating from different regions of Liaoning was Colletotrichum gloeosporioides (Penz.) Sacc. The sensitivity of the bacteria to carbendazim (EC50) ranged from 0.267 8 μg/mL to 2.731 2 μg/mL, averaged at 1.144 9 μg/mL. By calculating, most resistant strains showed resistance to a certain extent, but one strain of them showed higher resistance. The frequency distribution was irregular, and there was a trend to decreased sensitivity.