美国西芹是从美国引进的以茎用为主的蔬菜品种,因其具有抱合紧凑、质地致密、实心脆嫩、纤维含量少、产量高、耐贮运、品质好等特点,深受广大菜农和消费者的青睐,近年来在我国种植面积不断扩大。现将其常见病害的种类与防治要点介绍如下。1、斑枯病又称晚疫病、叶枯病,为真菌病害。发病初期,叶片上产生淡褐色油渍状小斑点,近圆形,边 American Celery is a vegetable species mainly stems introduced from the United States. Because of its characteristics of compactness, compact texture, crisp texture, low fiber content, high yield, storage resistance and good quality, And consumers of all ages, growing area in China in recent years. Now the types of common diseases and prevention points are described below. 1, spot blight, also known as late blight, leaf blight, is a fungal disease. Early onset, the leaves produce light brown stains like small spots, nearly circular, edge