一、锈病主要通过气流或雨水传播,在大蒜表皮或气孔侵入。低温、多雨时易发病。管理粗放,缺肥,植株生长弱,发病也重。防治技术:(1)农业防治:选用抗病品种;增施有机肥,特别是磷肥和钾肥,促进植株健壮生长,提高抗病能力;合理灌溉,雨后及时排水,降低田间湿度。(2)化学防治:发病初期选用15%三 First, rust is mainly spread by air or rain, invade the epidermis or stomata in garlic. Low temperature, easy to get sick when it is rainy. Extensive management, lack of fertilizer, plant growth is weak, the incidence is heavy. Prevention and control technologies: (1) Agricultural control: Select resistant varieties; increase organic fertilizers, especially phosphate and potassium fertilizers to promote robust plant growth and disease resistance; properly irrigate, timely draining water after rain and reducing field humidity. (2) chemical control: early onset of 15% selection III