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在西洋芹生产过程中,抓住主要病虫的防治工作,是夺取西洋芹高产、优质的一项关键性措施。一、西洋芹主要病害发生及防治 1.早疫病此病为真菌性病害,在温暖季节发病较严重。发病初期,在叶片上出现圆形黄褐色小斑点,在适宜条件下病斑迅速扩大,几天后中心变成浅褐色,周围有一圈黄晕,在整个生长期中为害叶片,老叶受害尤为严重。
In the celery production process, to seize the major pest control work, is to seize the high yield of celery, a key measure of quality. First, the occurrence and prevention of major diseases of celery 1. Early blight The disease is a fungal disease, the incidence is more serious in the warm season. In the early stages of the disease, round yellow-brown spots appeared on the leaves. Under appropriate conditions, the lesions rapidly expanded. After a few days, the center became light brown with a circle of yellow halo around them, damaging the leaves throughout the growth period. serious.