小麦白粉病,最近连年流行,危害很重;而现有杀菌剂防治效果不理想。本所从各种杀菌剂的药效比较中,发现粉锈宁(天津南开大学元素所提供)对白粉病有特效。 1.不同药剂的药效比较:田间试验,小区面积0.02亩,重复三次,每小区喷药2次(4/13、4/23),每次用药后10天调查病情。供试药剂为25％粉锈宁粉剂、25％粉锈宁胶悬剂、40％多菌灵百菌清混合剂、40％多菌 Wheat powdery mildew, epidemic in recent years, endangered; while the existing fungicide control effect is not satisfactory. Our comparison of the efficacy of various fungicides found that triadimencin (provided by Tianjin Nankai University) has been shown to have specific effects on powdery mildew. 1. Comparison of the efficacy of different pharmaceuticals: field trials, plot area of ​​0.02 acres, repeated three times, spraying 2 times per plot (4/13, 4/23), 10 days after each drug use to investigate the disease. Test agents for the 25% powder rust Ning powder, 25% powder rust Ning suspension, 40% carbendazim Qingqing mixture, 40% more bacteria