1、中毒症状 对氨气最为敏感的有黄瓜、辣椒、番茄、茄子等。受害叶片初期呈水浸状,以后逐渐褪为淡褐色。幼芽或生长点萎蔫,呈黑色。严重时叶缘焦枯,全株生理失水干缩而死。危害过程为,先下部叶片后至上部叶片,先叶缘后至全叶。有时在棚内点片发生,有的全棚植株均遭危害。 1, the symptoms of poisoning most sensitive to ammonia have cucumber, pepper, tomato, eggplant and so on. Victims of the early leaves were flooded, and later gradually faded to light brown. Buds or growing point wilting, black. Severe leaf edge scorch, dehydration dry shrinkage and death of the whole plant. Hazardous process, the first lower leaves to the upper leaves, the first leaf margin to the whole leaf. Occasionally in the shed spot film, and some shed all the plants were harmed.