葡萄穗轴褐枯病初步研究

葡萄穗轴褐枯病是我国葡萄产区一种新的病害,近几年在哈密市蔓延迅速.通过对哈密市回城乡采集的葡萄受害穗标样进行鉴定,葡萄穗轴褐枯病病原为半知菌亚门葡萄生链格孢霉(Alternaria viticola Brun).主要为害葡萄果穗幼嫩的穗轴组织.田间出现症状在5月下旬～6月下旬,病菌能以分生孢子在葡萄枝蔓表皮或芽鳞片内越冬,借风雨传播,不同品种对葡萄穗轴褐枯病抗病性有一定的差异.

Preliminary Study on Spike-stalk Brown Spot of Grape

Based on the preliminary investigation of the diseases of grape in Hami city, the authors found that the grape production had been seriously damaged by spike-stalk brown spot which had quickly spread in Hami city in recent years. It is one of the new diseases in the grape productuon area of our country. Some samples of spike-stalk from Hami city, China damaged by brown spot of grape were identified, which formerly was Alternaria viticola Brun. It mainly damaged young and tender spike～stalk tissue of grape fruit spike. The symptom in the fields always occurs on the last ten days of May～June. The germs which spread by wind and rain can survive winter on the surface of grape branches and tendrils or in the bud scale pieces, as conidiums. In the practical experiment the authors found that different varieties of grape are closely related to disease resistance of grape spike-stalk brown spot.