泡桐黑痘病为害泡桐苗木。在叶柄、嫩梢和干部的病斑呈灰褐色凸起,形似“黑豆”。病菌主要以茵丝和分生孢子盘在枝叶的病斑内越冬;翌年4月产生分生孢子,靠气流传播,以皮孔侵入为主,进行初次侵染;潜育期3—6天。泡桐不同种类抗病性有差异。留根苗发生严重,当年埋根苗受害较轻。 Paulownia acne disease Paulownia seedlings. Petiole, tender shoots and cadres were gray-brown spots protruding, the shape of “black beans.” Pathogenic bacteria mainly in Yin silk and conidia disk in the branches and leaves of winter; the following year in April conidia, by air flow to the main lenticel invasion, the initial infection; latent period of 3-6 days. Paulownia different types of disease resistance differences. Stay root and shoot serious, when burying root seedlings suffer less.