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韭菜灰霉病,又称白色斑点病,是冬春季冷棚韭菜上普遍发生的病害。每年冬季覆膜后,随着韭菜生长发育病情逐渐加重,迫使提前收割。若不注意清除病叶,则逐茬加重,一直延续到翌年4月下旬,揭膜后病害才停止。轻则叶片生斑,严重的减产20％～30％,而且病叶常有霉味,品质、风味剧降。1 症状 病害主要发生在叶片上,初浸染时叶面上产生白色至浅灰褐色的小点,一
Leek botrytis, also known as white spot disease, is a common winter and spring shed leek disease. After the annual winter coating, as the leek growth and development gradually aggravated, forcing early harvest. If you do not pay attention to clear the diseased leaves, the stubble by aggravating, has been extended to the end of April the following year, after the film did not stop the disease. Light leaves blade spot, a serious cut 20% to 30%, and the diseased leaves are often musty, quality, taste plummeted. 1 Symptoms Disease occurs mainly in the leaves, the initial dip when the leaves produce white to light brown spots, a