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[目的]研究芒果炭疽病菌对三唑酮的敏感性,建立敏感性基线,评价抗药性。[方法]2006—2013年,从国内及泰国和美国夏威夷等芒果产区采集病样分离、纯化芒果炭疽菌菌株,采用菌丝生长速率法测定其对三唑酮的敏感性。[结果]共分离获得125株芒果炭疽病菌株,对三唑酮的ec50值为2.52~31.75 mg/l,平均值为(11.29±5.17)mg/l,最大ec50值是最小ec50值的12.60倍。菌株对三唑酮的敏感性频率分布近似呈单峰曲线,平均ec50值可作为菌株对三唑酮的敏感性基线。[结论]芒果炭疽病菌对三唑酮具有较高的敏感性,尚未检测到抗性菌株,生产上仍具有较高的使用价值,但不同菌株的敏感性之间具有一定差异性,存在潜在抗性风险。
[Objective] The research aimed to study the sensitivity of the mango anthracnose to triadimefon, establish the sensitivity baseline, and evaluate the resistance. [Method] From 2006 to 2013, isolates of mango anthracnose were collected from domestic mango producing areas in Thailand, the United States and Hawaii. The susceptibility to triadimefon was determined by mycelium growth rate method. [Result] A total of 125 strains of mango anthracnose were isolated, the ec50 value of triadimefon was 2.52 ~ 31.75 mg / l, the average value was (11.29 ± 5.17) mg / l and the maximum ec50 value was 12.60 times of the minimum ec50 value . The sensitivity of the strain to triadimefon was approximately unimodal, and the average ec50 value could be used as the baseline for the sensitivity of the strain to triadimefon. [Conclusion] Colletotrichum gloeosporioides had high sensitivity to triadimefon and no resistant strains were detected yet, but it still had high value in production. However, there was a certain difference between the sensitivity of different strains and the potential resistance Sexual risk.