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番茄的主要病害有早疫病、晚疫病、灰霉病、叶霉病、病毒病、青枯病、脐腐病。主要虫害有棉铃虫、蚜虫、白粉虱。一、番茄早疫病1、症状。苗期、成株期均可染病,主要侵害叶、茎、花、果。叶片初呈针尖大的小黑点,后发展为不断扩展的轮纹斑,边缘多具浅绿色或黄色晕环,中部现同心轮纹,且轮纹表面生毛刺状不平坦物;茎部染病,多在分枝处产生褐色至深褐色不规则圆形或椭圆形病斑,凹陷不平。2、防治方法。常用药剂有40%1嘧霉胺悬浮剂1000—1.500倍液,或者50%异菌脲(扑海因)悬浮剂或可湿性粉剂1000倍液均匀喷施。早期预防
The main diseases of tomato are early blight, late blight, gray mold, leaf mold, virus disease, bacterial wilt, umbilical rot. The main insect pests have cotton bollworm, aphids, whitefly. First, tomato early blight 1, symptoms. Seedling, adult plants can be infected, the main violations of leaves, stems, flowers, fruit. The leaves initially showed a small black spot at the tip of the needle, which developed into an evergreen whetstone with a halo of light green or yellow at the edge. The middle part of the leaf was concentric and the burrlike surface was uneven. , Mostly in the branch to produce brown to dark brown irregular round or oval lesions, indentation. 2, prevention and control methods. Commonly used agents are 40% 1 pyrimethanil suspension 1000-1.500 times, or 50% iprodione (flox) suspension or wettable powder 1000 times spraying evenly. Early prevention