田间试验表明,25%甲维.毒死蜱水乳剂防治小麦蚜虫具有速效性好、持效期长的优点。药后1～3 d,25%甲维.毒死蜱水乳剂不同剂量对小麦蚜虫的防治效果为93.48%～100%,明显好于对照药剂甲维盐和吡虫啉的效果;药后7 d,对小麦蚜虫的防治效果为93.77%～99.53%,与对照药剂甲维盐和吡虫啉相近,极显著优于毒死蜱处理;药后14 d,对小麦蚜虫的防治效果仍有90.21%～97.20%,极显著优于毒死蜱和吡虫啉处理。25%甲维.毒死蜱水乳剂推荐用量(制剂用量)为750 mL/hm2,防治适期掌握在小麦齐穗后麦蚜始发期。 Field trials showed that the 25% carbaryl chlorpyrifos emulsion against wheat aphid has the advantages of good quick-acting and long-lasting effect. After 1 ~ 3 days and 1 ~ 3 days after treatment, the control effect of different doses of chlorpyrifos water emulsion on wheat aphids was 93.48% -100%, which was obviously better than that of the control agent, mevalonate and imidacloprid; on the 7th day after treatment, The control effect of aphids was 93.77% ~ 99.53%, which was very similar to the control agent carbaryl and imidacloprid, which was significantly better than chlorpyrifos treatment. The control effect of aphids on the 14th day after treatment was still 90.21% ~ 97.20% Chlorpyrifos and imidacloprid treatment. 25% of methylviarone chlorpyrifos water emulsion recommended dosage (preparation dosage) of 750 mL / hm2, prevention and control of the appropriate period of wheat ear after heading stage.