青椒疫病,菜农称为死秧病、烂秧病,是由藻菌纲、霜霉菌目、疫霉属中的真菌寄生所引起的一种严重病害。在我国分布较广,为害较重。1987年,辽宁省丹东地区发病面积占青椒栽培面积的90％以上,有40％绝收,经济损失达900万元以上。一、病症 1.苗期病症首先在根和根茎部发病。初期为水浸状,继而很快溃烂,使秧苗倒伏青枯而死。叶部有时受害,先为水烫状,其后青腐。 2.植株病症 (1)根部主根被侵染后变褐色或暗 Green pepper disease, vegetable farmers called dead seedling disease, rotten seedling disease, by the algae bacteria, downy mildew, Phytophthora in the fungus caused by a serious disease. Widely distributed in our country, the more serious damage. In 1987, Dandong, Liaoning Province, the incidence of area accounted for more than 90% of green pepper cultivation area, 40% of the total income, economic losses of 9 million yuan. First, the disease 1. Seedling disease first in the root and rhizome pathogenesis. The initial state of flooding, and then quickly fester, so that the seedlings lodging wither and die. Leaves sometimes victims, the first water-like, then green rot. 2. Plant disease (1) Root root after being infected brown or dark