芦笋茎枯病是我国芦笋生产中一种分布广、危害严重的毁灭性病害,被称为芦笋的癌症,在夏季多雨季节常造成大面积毁园。1.症状发病部位主要是茎和枝条,而不侵害叶。发病初期为水渍状古铜色小斑点,逐渐扩展形成纺锤形边缘红褐色或褐色的病斑;中后期病斑中央变灰褐色,稍凹陷,密生黑 Asparagus stem blight is a kind of widespread and serious devastating disease in the production of asparagus in our country. It is called cancer of asparagus and often causes large-scale destruction of the garden in the rainy season in summer. 1. Symptoms of disease mainly stems and branches, without infringing leaves. Early onset of water-like bronze small spots, and gradually expanded to form a spindle-shaped edge brown or brown spots; mid-late lesion central gray brown, slightly depressed, dense black