葡萄穗轴褐枯病（以下简称褐枯病），近两年在巨峰葡萄园为害日趋严重，一般减产25％～30％，严重时损失50％以上。褐枯病主要在早春开花期前后发生。发病初期，先在穗轴上产生褐色的水浸状小斑点，而后迅速向四周扩展，使整个分枝穗变褐枯死，果粒随之萎缩脱落。在湿度大... Grape Cotyledon wilt (hereinafter referred to as “Cotyledons wilt”) has become more and more serious in the past two years in the Kyoho Vineyards, with a general decrease of 25% -30% and a serious loss of more than 50%. Brown rot occurs mainly in the early spring flowering period. Early onset, first in the cob of brown flooding-like spots, and then quickly expanded to the surrounding branches of the brown browned, fruit shrinking then fall off. In humidity ...