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为寻求防治黄瓜白粉病的高效、低毒药剂,采用叶盘沾药法对黄瓜白粉病进行室内毒力测定。多抗霉素对黄瓜白粉病菌的EC50为1.0121 mg/L,其与咪鲜胺以质量比为2∶8混配时共毒系数(CTC)高达175.79,具有明显增效作用。田间药效试验证明,在黄瓜白粉病初发期,使用22%多抗.咪鲜胺ME 225～450 g/hm2喷雾防治,第2次药后7 d调查,防效高达89.04%～97.81%,同剂量条件下其防效明显优于对照药剂。22%多抗.咪鲜胺ME可作为防治黄瓜白粉病的理想药剂,且在推荐剂量范围内对作物安全。
To seek cucumber powdery mildew prevention and treatment of high efficiency, low toxicity agents, the use of leaf disk dip method to test cucumber powdery mildew indoor toxicity. The EC50 of polyoxin on cucumber powdery mildew was 1.0121 mg / L, and its co-toxicity coefficient (CTC) was as high as 175.79 when mixed with prochloraz at a mass ratio of 2: 8 with obvious synergism. Field efficacy tests showed that the cucumber powdery mildew in the initial issue, the use of 22% multi-resistance with prochloraz ME 225 ~ 450 g / hm2 spray prevention and control, 7 d after the second drug investigation, the anti-efficiency as high as 89.04% to 97.81% , With the same dose of its control effect was significantly better than the control agent. 22% polyclonal. Prochloraz ME can be used as an ideal medicament for controlling cucumber powdery mildew and is safe for crops within the recommended dosage range.