1.症状。草莓白斑病又称蛇眼病,多发生在老叶上,叶柄、果梗、浆果也可受害。染病初期,叶片上出现深紫色小圆斑,病斑逐渐扩大后中心变灰色,周围紫褐色,呈蛇眼状。病情严重时,病斑融合导致叶片枯死,影响植株生长和芽的形成。果实染病后,被害种子连同周围果肉均变成黑色,失去商品价值。2.发病规律。该病病菌多以菌丝和分生孢子越冬,也可以菌核越冬,有的还会以子囊壳越冬,翌春产生分生孢子或子囊孢子进行传播和初次侵 1. Symptoms. White spot disease, also known as snake eye disease strawberry, occurs in the old leaves, petiole, fruit stems, berries can also suffer. In the early stage of infection, the dark purple spot appeared on the leaves. After the lesion enlarged gradually, the center became gray with purple-brown color around the snake-like eye. When the condition is serious, the spot fusion leads to the withered leaves, which affects the plant growth and bud formation. After the fruit was infected, the seeds of the victim became black with the surrounding pulp, losing the value of the commodity. 2. The incidence of law. Most of the pathogenic bacteria overwinter mycelium and conidia, but also overwintering sclerotinia, and some will overwinter ascus capsule, the next spring produce conidia or ascospores and disseminated the first invasion