板栗干枯病又称栗树腐烂病、栗疫病,是栗树上的重要病害,被列为国内检疫对象。1.为害症状苗木和结果树都可受侵染。发病初期在病部表皮出现水渍状,褐色,边缘不规则病斑,后逐渐扩展直至包围树干,并向下蔓延。病部组织有浓酒槽味,失水后树皮干缩纵裂,外观变灰白色或青灰色,病皮产生瘤状小突起,雨后涌出黄色卷须状孢子角,最后病皮干缩开裂。 Chestnut dry blight, also known as chestnut tree rot disease, chestnut blight, is an important disease on the chestnut, was listed as domestic quarantine object. 1. Harmful symptoms Seedlings and fruit trees can be infested. The early onset of disease in the epidermis water-like appearance, brown, irregular edge of the lesion, and then gradually expanded until surrounded by trunk, and spread downward. The diseased tissue has a strong taste of the trough, after drying, the bark shrinks and shrinks, the appearance becomes gray or grayish gray, the nodules produce nodular small protrusions, the yellow tendril-like spore gushes out after the rain, and finally the sheaths shrink and tear .