琯溪蜜柚黑点病的发生规律

Occurrence Regularity of Black-dot Disease of Citrus grandis(L).Qsbeck cv.Guanximiyou

琯溪蜜柚黑点病已成为平和县蜜柚生产上的主要病害之一,严重影响果实的外观品质和销售价格。自2014年以来,对该病的症状、发生规律开展研究,发现新梢整个生长期都能发病,果实只在幼果期发病。栽培管理不善、修剪造成大量伤口、枯枝长期累积大量菌源、柚园小气候适宜均有利于黑点病的发生。

Black-dot disease has become one of the major diseases of pomelo production in Pinghe County, and it seriously affects the appearance quality and selling price of fruits.Since 2014, the symptoms and regularities of the disease have been studied.The results showed that new shoots could occur the diseases in the whole growth period,and the fruit occurred only in the young fruit stage.They were beneficial to the occurrence of black-dot disease, such as unsuibable cultivation and management, a mass of cuts caused by pruning, a large number of bacterial sources accumulated for long periods, suitable orchard microclimate etc.