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胡萝卜属伞形花科作物,适应广,耐贮运,以肉质根食用,营养丰富,是秋冬两季的主要蔬菜品种之一,现将胡萝卜常见病害认识及防治简介如下。1.胡萝卜黑斑病该病为害胡萝卜的茎、叶及叶柄、叶片,染病时,多从叶缘开始,发病后呈不规则形,深褐色到黑色,湿度大时斑点长出黑色霉层,严重时病斑融合,叶缘向上卷起,叶片大量枯死。该病病菌在种子或病残体内越冬,翌年进行初次感
Carotid Umbelliferae Crops, adapted to wide, resistant to storage and transportation, fleshy root consumption, nutrient-rich, is one of the main autumn and winter vegetable varieties, carrots are now common disease awareness and prevention as follows. 1. Carrot black spot The disease is harmful carrot stems, leaves and petiole, leaves, when infected, and more from the leaf margin began irregular after the onset of shape, dark brown to black, when the humidity is large spots grow black mildew, In severe cases, the lesion merges, and the leaf margin curls upward, causing a large number of leaves to die. The pathogen bacteria in the seeds or sick in winter, the first year of the initial flu