一、几种蔬菜灰霉病的症状1.黄瓜灰霉病主要危害花、瓜条、叶片、茎蔓。一般从凋谢的雌花侵入,引起花腐烂,出现灰褐色霉层。病菌扩散后,小瓜条表软、腐烂、萎缩,病斑先发黄,后长出霉层,并逐渐变为浅灰色,病瓜停止生长,最后腐烂脱落。叶片上多形成直径20~50毫米的褐色病斑,边缘明显,有时病斑有少量龙褐色霉层,茎蔓发病后瓜蔓易折断、烂秧、枯萎。2.番茄灰霉病主要危害果实。病菌从残留的花或花托侵 First, the symptoms of several vegetables gray mold 1. Botrytis cinerea major harm flower, melon, leaves, stems and vine. In general, withered female flowers invade, causing flower decay, gray-brown mildew appears. After the spread of germs, small melon strips soft, rotten, atrophic, lesion first yellow, grow mold layer, and gradually become light gray, disease melon stop growing, and finally decay. More leaves formed on the diameter of 20 to 50 mm brown lesions, the edge is obvious, and sometimes a small amount of brown spots mildew mildew, stems and cranberries easy to break after the melon, rotten seedlings, withered. 2. Tomato gray mold disease is the main hazard. Germs invade from the remaining flowers or flowers