葡萄日灼病也叫日烧病,是果面局部失水而发生的日灼伤。该病大多发生在浆果硬核期,着色以后不再发生。症状:果粒发生日灼时,果面生淡褐色近圆形斑,边缘不明显,果实表面先皱缩后逐渐凹陷,严重的果穗变为干果。卷须、新梢尚未木质化的顶端幼嫩部位也可遭受日灼伤害,致梢尖或嫩叶萎蔫变褐。 Sunburn grapes, also known as the Japanese burn disease, is the result of local dehydration and burns on the day. Most of the disease occurs in the hard core of the berries and does not recur after the coloring. Symptoms: fruit burning occurs on the day when the fruit surface pale brown nearly circular spot, the edge is not obvious, the surface of the fruit gradually shrinking after the first depression, the serious ear into a dried fruit. Tendon, the tip has not yet lignified the top of the tender site can also suffer from sunburn damage, causing tip or young leaves wilting brown.