Fungicide for preventing and treating powdery mildew of wheat

The invention discloses a fungicide for preventing and treating powdery mildew of wheat. The fungicide comprises the following raw materials by mass: 5 to 60% of active components and 5 to 30% of an auxiliary agent, with the balance being a filling material, wherein the active components are metconazole and ethirimol. The fungicide provided by the invention has the advantages that since metconazole and ethirimol are used at the same time, complement each other and produce synergism, the fungicide has more obvious synergistic effect on powdery mildew, can substantially improve prevention and treatment effect, has a long action period and is capable of effectively delaying resistance of powdery mildew to any single fungicide component compared with usage of the single fungicide components of the fungicide; and the fungicide can replace a part of high-toxicity fungicides, is reduced in dosage and cost, and reduces environmental pollution and residues on agricultural products. 本发明公开了种防治小麦白粉病的杀菌剂，按质量百分数计包括如下原料：活性组