叶菜类包括大白菜、甘蓝、芹菜、韭菜等。一、主要病虫害基本情况主要病害有霜霉病、软腐病、病毒病、黑腐病、黑斑病、干烧心、斑枯病、灰霉病等。主要虫害有蚜虫、菜青虫、小菜蛾、韭菜蛆、甜菜夜蛾等。二、主要病虫的发生特点苗期遇雨地势低洼或排水不及时而易发软腐病;成株期高温多雨久旱遇雨软腐病严重;潮湿、阴雨天气有利霜霉病、黑腐病、黑斑病、菜青虫、小菜蛾的发生;天气偏旱易发生干烧病,易发蚜虫、甜菜夜 Leafy vegetables include cabbage, cabbage, celery, leeks and so on. First, the basic situation of the main pests and diseases The main diseases are downy mildew, soft rot, virus disease, black rot, black spot, heartburn, spot blight, gray mold and so on. The main pests are aphids, cabbage caterpillar, diamondback moth, chives maggot, beet armyworm and so on. Second, the main characteristics of the occurrence of pests and diseases at the seedling rainy low lying or drainage is not timely and prone to soft rot; adult hot and rainy drought severe rain soft rot; moist, rainy weather favorable downy mildew, black rot Diseases, black spot, Pieris rapae, Plutella xylostella; drought prone to dry weather, susceptible to aphids, beetle night