怎样防治马铃薯晚疫病

• 作 者: 杨绍意
• 出 处: 农家之友
• 发表日期: 1999年10期
• 关键词: 马铃薯晚疫病 马铃薯 霉状物 叶缘 叶片背面 病叶 水渍 病害 叶片 杀毒矾

一、危害症状马铃薯晚疫病长期以来一直是马铃薯生产中的一个主要病害,严重影响着马铃薯的产量。发生严重时造成大量植株成片死亡,减产相当严重。此病可侵染叶片、茎和薯块。叶片先在叶缘产生水渍状黄褐色病斑,潮湿时,病斑迅速扩大成不规则大斑,边缘不明显,叶片背面边缘产生一圈白色霉状物,最后病叶变黑腐

First, the harmful symptoms Potato late blight has long been a major disease in potato production, seriously affecting the yield of potato. In serious cases, a large number of plants died in a piece, and the yield reduction was quite serious. The disease can invade the leaves, stems and tubers. Leaves first leaves edge of the water-like yellowish-brown spots, damp, the rapid expansion of lesions into irregular large spots, the edge is not obvious, the edge of the leaves back to produce a circle of white mildew, the last diseased leaves turn black