1.症状特点白粉病是保护地草莓生产中的一种常见病害,主要危害叶片、果实、果梗。发病初期,叶片背面局部出现薄霜状的白色粉状物,以后迅速扩展至全株,随着病情的加重,叶片向上卷曲,呈汤匙状;花蕾、花感病后,花瓣变为红色,花蕾不能开放;果实发病后,果面覆盖一层白色粉状物,果实 1. Symptoms and Characteristics Powdery mildew is a common disease in protected strawberry production, with the main hazards of leaves, fruits and fruit stems. Early onset, the back of the leaves appear thin cream-like white powder locally, after the rapid expansion to the whole plant, with the aggravation of the disease, the leaves curled up, was spoon-shaped; buds, flower flu, the petals turn red, buds Can not be open; fruit after the onset, the fruit surface covered with a layer of white powder, fruit