一、病害1.黑斑病危害病状:黑斑病又称黑霉病,同半知菌亚门、格孢属直菌侵染所致。它不但侵染花椰菜,还侵染结球甘蓝、球茎甘蓝、孢子甘蓝和芥蓝。主要危害叶片、叶柄、花梗和种荚叶片,发病多从外叶开始产生小黑斑,扩展后为灰褐色圆形病斑,潮湿时病斑上生有黑色霉状物,病斑多时 First, the disease 1. Black spot disease damage: black spot disease, also known as black mold disease, with the penicillium subfamily, Geospora is caused by infection. It infects not only broccoli but also cabbage, kohlrabi, spore kale and kale. The main hazards of leaves, petiole, pedicel and seed pod leaves, the incidence of more from the outer leaves began to produce small black spots, expanded to a brownish brown spots, damp spots on the birth of a black mildew, spots and more