注意疫病危害可用72·2%霜霉威水剂600至800倍，72%霜脲·锰锌700倍，64%噁霜·锰锌，烯酰吗啉加丙森锌，氟吗啉加代森锌，氰霜唑，精甲霜灵防治。 ＜a/＞…………………………………………………………………………………………………………………… 疫病危害，建议，用银法利，霜霉威盐酸盐，氟吗啉 250克/升嘧菌酯48-90毫升/亩喷雾 80%烯酰吗啉20-30克/亩喷雾 69%烯酰·锰锌133-200克/亩喷雾 72%霜脲·锰锌125-167克/亩喷雾 722克/升霜霉威60-100毫升/亩喷雾 可用以上药剂结合氨基酸叶面肥+丙森锌交替使用防治。 ＜a/＞…………………………………………………………………………………………………………………… 洋葱疫病危害，建议选用68·75%霜霉威盐·氟吡菌胺悬浮液剂800倍液、50%烯酰吗啉可湿性粉剂1000倍液等配合有机硅喷施防治。 ＜a/＞…………………………………………………………………………………………………………………… 疫病，可以用甲霜灵或银发利或氰霜唑+四霉素或乙蒜素或喹啉铜。 ＜a/＞…………………………………………………………………………………………………………………… 洋葱疫病的防治方法 ＜a/＞…………………………………………………………………………………………………………………… 农业防治 ＜a/＞…………………………………………………………………………………………………………………… 与非百合科蔬莱轮作2年以上。选择排水良好的地块栽植，合理密植，雨后及时排除积水，加强栽培管理，合理采用配方施肥，增强寄主抗病力。收获后及时清除田间病残体。 ＜a/＞…………………………………………………………………………………………………………………… 化学防治—化学药剂参考 ＜a/＞…………………………………………………………………………………………………………………… 75% 百菌清 可湿性粉剂（微毒） 使用600~800倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… 722克/升 霜霉威盐酸盐 水剂（低毒） 使用800～1000倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… 25% 吡唑醚菌酯 悬浮剂（低毒） 使用1500～2000倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… 86.2% 氧化亚铜 可湿性粉剂（低毒） 使用2000～2500倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… 72% 锰锌·霜脲 可湿性粉剂（低毒） 使用600～800倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… 25% 嘧菌酯 水分散粒剂（低毒） 使用1500~2000倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… 77% 氢氧化铜 可湿性粉剂（低毒） 使用800~1000倍液 喷雾 ＜a/＞…………………………………………………………………………………………………………………… To prevent blight, use 72.2% propamocarb aqueous solution at a dilution of 600-800 times, 72% cymoxanil-mancozeb at a dilution of 700 times, 64% oxazolidinone-mancozeb, dimethomorph plus propineb, flumorph plus mancozeb, cyazofamid, and metalaxyl-M. ＜a/＞…………………………………………………………………………………………………………………… For blight, it's recommended to spray silverfarm, propamocarb hydrochloride, flumorph 250g/L azoxystrobin at a dilution of 48-90ml/mu, 80% propamocarb at a dilution of 20-30g/mu, 69% propamocarb-mancozeb at a dilution of 133-200g/mu, 72% cymoxanil-mancozeb at a dilution of 125-167g/mu, and 722g/L propamocarb at a dilution of 60-100ml/mu. These agents can be combined with amino acid foliar fertilizer and propineb for alternate control. ＜a/＞…………………………………………………………………………………………………………………… Lv Lanhua (Liaocheng City, Shandong Province, Yanggu County Agricultural Bureau, Shandong Province, specializes in tomato, cucumber, cowpea, leek, and pepper technology) ＜a/＞…………………………………………………………………………………………………………………… For onion blight, it is recommended to use an 800x dilution of 68-75% propamocarb salt and fluopyram suspension, a 1000x dilution of 50% dimethomorph wettable powder, and other spraying methods combined with silicone. ＜a/＞…………………………………………………………………………………………………………………… Zhao Juan (Agricultural Supply Store, Shouguang City, Weifang City, Shandong Province, specializes in plant protection for tomatoes, cucumbers, peppers, and loofahs) ＜a/＞…………………………………………………………………………………………………………………… For onion blight, metalaxyl, silver-fat-sil, cyazofamid, tetramycin, ethyl allicin, or quinoline copper can be used. ＜a/＞…………………………………………………………………………………………………………………… Onion blight prevention and control methods ＜a/＞…………………………………………………………………………………………………………………… Agricultural prevention and control ＜a/＞…………………………………………………………………………………………………………………… Crop rotation with non-lily vegetables for at least two years. Choose well-drained plots for planting, plant at a reasonable density, drain water promptly after rain, strengthen cultivation management, and use a well-formulated fertilization method to enhance host disease resistance. Remove diseased debris from the field promptly after harvest. ＜a/＞…………………………………………………………………………………………………………………… Chemical Control - Chemical Agent Reference ＜a/＞…………………………………………………………………………………………………………………… 75% chlorothalonil WP (slightly toxic) - Use a 600-800 times dilution for spraying ＜a/＞…………………………………………………………………………………………………………………… 722 g/L Fabamocarb HCl Aqueous Solution (low toxicity) - Use an 800-1000 times dilution for spraying ＜a/＞…………………………………………………………………………………………………………………… 25% Pyraclostrobin SC (low toxicity) - Use a 1500-2000 times dilution for spraying ＜a/＞…………………………………………………………………………………………………………………… 86.2% Cuprous Oxide WP (low toxicity) - Use a 2000-2500 times dilution for spraying ＜a/＞…………………………………………………………………………………………………………………… 72% Mancozeb/Cymoxanil WP (low toxicity) - Use a 600-800 times dilution for spraying ＜a/＞…………………………………………………………………………………………………………………… 25% Azoxystrobin WDG (low toxicity) - Use a 1500-2000 times dilution for spraying ＜a/＞…………………………………………………………………………………………………………………… 77% Copper Hydroxide WP (low toxicity) - Use an 800-1000 times dilution for spraying＜a/＞…………………………………………………＜a/＞………………………………＜a/＞………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………