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20 0 1年从北碚、云阳、开县、万州、巫溪和忠县等地采集马铃薯晚疫病病叶 ,共分离得 94株致病疫霉。用生长速率法测定其对甲霜灵的抗性和抗性水平 ,结果表明 :2 0 2 %的菌株表现为抗性 ,11 7%的菌株表现为中抗 ,6 8 1%的菌株表现为敏感 ;以菌株PBB 110 2为敏感对照 ,所测定的 2株抗性菌株的抗性水平达 10 6倍以上 ,各地菌株抗性表现与菌株来源地的施药水平密切相关 ,并对抗药性不同的地区提出了不同的用药策略
In 1994, 94 Phytophthora infestans isolates were collected from Beidai, Yunyang, Kaixian, Wanzhou, Wuxi and Zhongxian counties. The growth rate method was used to test its resistance and resistance to metalaxyl. The results showed that 202% strains showed resistance, 11.7% strains showed moderate resistance, and 68.1% strains showed Sensitive to the strain PBB 110 2 as a sensitive control, the resistance of the two strains tested more than 10 6 times the resistance of strains in various places and strains of origin is closely related to the level of application and resistance of different Region proposed different medication strategies