菊花既有观赏价值又有药用和食用价值,其在生长过程中,常受到病虫害侵袭,现将几种主要病害介绍如下:菊花白粉病菊花常见的病害,病变部位出现白色粉状物,多发于叶片、叶柄等处,有时幼茎、花柄、花芽也会受害。初发时,白色粉状物主要在叶片正面,条件适宜时,全部叶片布满白色粉状物,后期则出现黑色小点,严重者叶片枯萎卷缩,植株矮化,花瓣畸形或者不开。长期阴雨和氮肥施用过多时发病严重,尤其是在室内栽培的植株,病势蔓延迅速,所以,需随时注意加强防治。 Chrysanthemum both ornamental value as well as medicinal and edible value, its growth process, often affected by pests and diseases, the main diseases are introduced below: Chrysanthemum powdery mildew common diseases, lesions appear white powder, multiple Leaves, petioles, etc., sometimes young stems, flower stalk, flower buds will suffer. At the beginning of the first episode, the white powder is mainly on the front of the leaves. When the conditions are right, all the leaves are covered with white powder, while the black dots appear at the later stage. In severe cases, the leaves are withered and curled, the plants dwarfed, and the petals deformity or not. Long-term overcast and overuse of nitrogen fertilizer can cause severe morbidity, especially in indoors cultivated plants. The disease spread rapidly, so we should pay attention to strengthen prevention and control.