杜鹃花瘿病在我国及其它国家的杜鹃花分布区均有发生,野生和栽培的皆受其害,危害性很大。此病春季开始发生。植株的幼嫩部分都可能受害,其中以叶片、花芽和新梢受害较重,发病后肿胀变厚,面目全非,所形成的瘿状物非常明显,故称瘿病或肿病。此类瘿状物形态不一,大小悬殊,如蜡质状,灰绿色或灰白色,有时出现淡粉红色或白色霉层。到后期,瘿状物转为褐色,失水变干。病情严重时,可使植株大量落叶,以致不能开花。 Rhododendron wilt disease occurs in the distribution areas of azaleas in our country and other countries. Wild and cultivated plants are harmed and harmful. The disease began to occur in the spring. Young parts of plants may suffer, including leaves, flower buds and shoots heavier, after the onset of swelling thicker, beyond recognition, the formation of the scallops is very obvious, so called hysteria or swollen disease. Such 瘿 shaped objects vary in shape, size, such as waxy, gray-green or gray, and sometimes pale pink or white mold layer. To the late, 瘿 shaped into brown, dehydration dry. Serious illness, can make a large number of plants deciduous, so can not flowering.