近年来,有些地方种植的绿豆产量不高,重要原因之一是受了白粉病的危害。白粉病的病原是一种真菌,具有菌丝体和粉孢子。粉孢子很容易由风传播。绿豆植株较密,通风差,容易发病。白粉病通常侵害下部遮荫的叶片,以后逐渐向上蔓延,在叶面或叶背有灰白色的粉状物(即菌丝体和粉孢子)。被害叶片呈黄绿色,叶片较薄,严重时患处枯焦,影响绿豆结荚,降低产量。防治的方法是:增施草木灰,提高植株抗病 In recent years, some places produce mung bean is not high yield, one of the important reasons is the risk of powdery mildew. The pathogen of powdery mildew is a fungus with mycelium and powder spores. Spore powder is easily spread by the wind. Mung bean plants more dense, poor ventilation, easy to disease. Powdery mildew usually infects the lower, shaded leaves and gradually spreads upwards with an off-white powder (ie, mycelium and powder spores) on the foliage or leaf. Victims were yellow-green leaves, leaves thinner, serious when the affected area Kujiao affect mung bean pods and reduce production. Prevention methods are: increase the ash, improve plant disease resistance