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大葱常见病害主要有紫斑病、锈病、菌核病、黄矮病、霜霉病、灰霉病、软腐病、黑斑病等。常见的虫害主要有葱蛆、葱蓟马、斑潜叶蝇、斜纹夜蛾、甜菜夜蛾等。一、防治原则按照“预防为主,综合防治”的植保方针,以生态(农业)防治、物理防治、生物防治为主,化学防治为辅。化学防治要选用高效、低毒、低残留农药,杜绝使用剧毒、高残留农药,严格按安全间隔期用药。二、农业防治选用前茬未种植过葱蒜类蔬菜,土壤肥沃的
The common diseases of green onions are purple spot disease, rust disease, sclerotinia, yellow dwarf disease, downy mildew, gray mold, soft rot, black spot and so on. The common pests are onion maggot, onion thrips, spotted leaf fly, Spodoptera, beet armyworm and so on. First, the principle of prevention According to “prevention first, comprehensive prevention and cure ” plant protection policy, ecological (agricultural) prevention and control, physical prevention and treatment, biological control, supplemented by chemical control. Chemical control should use highly efficient, low toxicity, low residual pesticides, eliminate the use of highly toxic, highly pesticide residues, strictly according to the safety interval of medication. Second, the selection of agricultural prevention and control of the previous crop has not planted onion and garlic vegetables, fertile soil