霜霉病是为害葡萄的严重而普遍的病害,波尔多液是预防葡萄霜霉病的有效药剂。但近年发现为增加葡萄果实含糖量,在喷波尔多液时,将磷酸二氢钾一起混入,结果喷混合药液的植株发病重,说明混入磷酸二氢钾后降低了波尔多液的药效,也没有达到提高果实含糖量的目的。 Downy mildew is a serious and common disease that damages grapes and Bordeaux mixture is an effective agent to prevent grape downy mildew. However, in recent years, it has been found that in order to increase the sugar content of grape fruits, the potassium dihydrogen phosphate is mixed together when sprayed with Bordeaux mixture. As a result, the plants sprayed with the mixed solution have a heavy incidence, indicating that the effect of mixing Bordeaux mixture with potassium dihydrogen phosphate is reduced, Did not achieve the purpose of raising the sugar content of fruit.