锈病是豆类蔬菜常发且危害严重的一种病害,菜豆、扁豆、蚕豆、刀豆或其它豆类蔬菜都能发生.每年以8—9月为发病盛期.发病时,叶上初为白色褪绿小点,后逐渐形成黄褐色隆起的夏孢子堆,夏孢子堆表皮破裂后,可见发出大量红褐色的粉状夏孢子.后期在叶片,尤其是叶柄和茎上,会长出暗褐色隆起的大病斑,进而再度散发出粉状冬孢子,发病严重时,叶上孢子堆呈现密集,一个叶片上数量可达上千个,以至使整个叶片上数量可达上千个,以至使整个叶片枯黄、皱缩、脱 Rust disease is a common disease in leguminous vegetables and a serious hazard, canola, lentils, beans, beans or other legumes can occur every year from August to September as the peak of the incidence of disease, the beginning of the leaves White chlorotic small dots, and gradually formed yellow brown bulge of summer spore reactor, rupture of the summer spore rupture, we can see a large number of reddish brown powdery spores. Later in the leaves, especially petiole and stem, grow dark Brown bulge of the big spot, and then again exudes a powdery teliospores, severe disease, the leaves spore reactor dense, a blade up to the number of up to thousands, so that the entire leaf up to the number of up to thousands, and even So that the entire leaves yellow, wrinkled, off