通过敏感性测定，明确了不同小麦品种对麦田磺酰脲类除草剂的耐药性。结果表明，百农６５、豫麦２号耐药性较强；百农６４、豫麦３２号、中育３号耐药性居中；豫麦２１号、豫麦１８号耐药性较弱。豫麦２１号对药剂的敏感性最强，用药不当，易产生药害。并对品种×药剂间及品种×药剂×含量间的协同效应进行了分析。 Through the determination of sensitivity, the wheat varieties of sulfonylurea herbicides were identified resistant to different wheat varieties. The results showed that the resistance of BaiNong 65 and Yumai 2 were stronger; the resistance of BaiNong 64, Yumai 32 and ZhongYu 3 was the middle; the resistance of Yumai 21 and Yumai 18 was weak. Yumai 21, the most sensitive to the agents, improper medication, easy to produce injury. The synergistic effects between varieties × medicinal plants and varieties × medicinal × contents were analyzed.