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现在正是保护地蔬菜育苗的季节，培育无病健壮的幼苗是丰收的基础，预防苗期病害是保证培育壮苗的关键措施。下面介绍蔬菜苗期的主要病虫害及防治方法： 一、症状识别 1.猝倒病 由病原真菌的腐霉菌引起。番茄、黄瓜、甜椒、茄子、莴苣等蔬菜幼苗发病多发生在育苗床上，
Now it is the season of vegetable nurseries in protected areas. It is the basis for harvesting disease-free and robust seedlings. Prevention of seedling stage diseases is the key measure to ensure nurturing seedlings. The following describes the main pests and diseases of vegetables and prevention methods: First, the symptoms identified 1. Damp down disease caused by pathogenic fungi Pythium. Tomato, cucumber, bell pepper, eggplant, lettuce and other vegetable seedlings incidence occurred in nursery bed,