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在施用甲磺隆的抗性观察圃里 ,跟踪调查杂草的抗性生物型 ,采集表现抗性的杂草———少花龙葵和三叶鬼针草种子 ,用生物测定和生化分析方法 ,进行其抗性水平测定。结果表明 ,连续 2年 4次施用甲磺隆的少花龙葵和三叶鬼针草 ,只有少花龙葵表现抗性 (抗性因数为 2 19,等浓度防效降低 2 9% ,敏感性比为 1 5 8,乙酰乳酸合酶的活性比为 1 6 1)。三叶鬼针草的抗性差异不明显
In the Botanical Garden for Resistance Observation with metsulfuron-methyl, the resistant biotypes of weeds were tracked and the weeds resistant to weeds were collected - B. halibut and B. obliquus seeds. Bioassay and biochemical analysis Method, its resistance level determination. The results showed that the resistance rate was only 2% in Solanum nigrum (2 19%), while the isocontrol was 29% lower in sensitivity The sex ratio was 15.8, and the activity ratio of acetolactate synthase was 1 6 1). There was no obvious difference in the resistance of Bidens bipinnata