露天茄子定植后会有死苗的现象发生,打开根茎部可以看到根茎已变色,这种现象三种病害均有可能发生——枯萎病、黄萎病和青枯病,这三个均可造成维管束变褐,但是具体区别还要看地上部分的症状和维管束的气味变化。不但要看茎干变色、还要看死棵的叶片情况。1.青枯病:多在茄子现蕾开花后出现,表现为整株急性萎蔫症。诊断青枯病要注意两点:一是病株开始仅在晴朗高温天气里自上而下出现萎蔫,叶片下垂,晚间和清晨尚可恢复正常, Open-planted eggplants will have dead seedling phenomenon occurs, open the rhizome can see the rhizome has been discoloration, this phenomenon may occur three diseases - Fusarium wilt, Verticillium wilt and bacterial wilt, these three can be Resulting in vascular bundle browning, but the specific difference depends on the symptoms of the above ground and vascular changes in the smell. Not only look at stem color, but also look at the dead tree leaves situation. 1. Bacterial wilt: Appear in flower buds after emergence of eggplant, showing the whole plant acute wilt disease. The diagnosis of bacterial wilt should pay attention to two points: First, the diseased plants began to appear wilting only from top to bottom in clear and hot weather, the leaves sagged, and returned to normal in the evening and early morning.