桃树红叶病,主要是由于缺钾引起的。桃树缺钾,初期表现为叶缘紫红色,其后整个叶片呈紫红色,即所谓红叶病。在春季萌芽时,缺钾桃树叶小、色淡、叶皱缩卷曲、发新枝少且细短。重者叶片纵卷、弯曲成镰刀状,叶面散布有小孔或裂口,甚至叶缘焦 Peach tree leaf disease, mainly due to potassium deficiency caused. Peach potassium deficiency, the initial performance of the edge of the purple leaves, followed by the entire leaves were purple, the so-called red leaf disease. Budding in the spring, the potassium-deficient peach leaves small, pale, folds curly hair, hair new and less hair thin. Heavy leaf vertical roll, curved into a sickle-shaped, foliar folds or holes, and even leaf margin coke