葡萄穗轴褐枯病是一种新型的葡萄病害，主要为害葡萄花序以及花期幼穗，鲜见为害嫩枝、嫩叶。花序与幼穗在受害初期，在穗轴与小穗梗基部出现或大或小，或局部或环形的水清状凹陷的病斑，轻者花穗局部受害，重者整个花序受损。受害的穗轴穗梗停止增粗、伸长，前端花序萎缩不能 Cotyledon sheath blight is a new type of grape diseases, mainly harmful to grape inflorescence and inflorescence panicles, rare damage to shoots, young leaves. Inflorescences and young ears in the initial victims, in the cob and spikelets base of the Ministry of large or small, or local or annular water clear depression of the lesion, the light of the local damage spikes, severe cases of the entire inflorescence damage. The affected ear panicles stop thickening, elongation, apex atrophy can not