宁夏稻田稗草对丙草胺和氰氟草酯的抗性

China Plant Protection(2021)

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Abstract
采用滤纸法测定了 20个采自宁夏稻田的稗草样本对丙草胺和氰氟草酯的抗性水平,发现稗草样本对丙草胺的总体抗性为低至中等水平:5个样本对丙草胺敏感;4个为低水平抗性;其余11个为中等水平抗性,抗性指数最高为19,ED50为 0.000 1~0.001 9mL/L.稗草样本对氰氟草酯的总体抗性为中高水平:20个样本中,只有1个对氰氟草酯敏感,ED50为0.000 2mL/L;1个为低水平抗性,ED50为0.001 4 mL/L;9个为中等水平抗性,ED50为0.002 1~0.007 6 mL/L;9个为高水平抗性,抗性指数最高达92.供试稗草样本有70%对氰氟草酯和丙草胺均产生了抗性.
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