Why do cherry leaves curl?

Why do cherry leaves curl? What caused it? How to control the cherry tree is growing well on the whole, but the leaves are curly recently. I want to know what's going on. There are many factors that cause cherry trees to roll leaves, especially in summer, when the weather is hot, plants are likely to roll leaves. If the plants are short of water only because of the hot weather, the symptoms can be relieved as long as they are watered or shaded properly. But it may also be the harm of aphids. Aphids often gather on the back of the leaves to suck juice, causing curls and wrinkles of the leaves. For aphids, 2000-fold solution of imidacloprid or pyrethroid pesticides can be used to control aphids. In addition, the lack of nutrients in cherries can also lead to curling leaves. Here, Zhang Zhicheng listed the following symptoms and solutions of element deficiency for fruit growers' reference. Due to potassium deficiency, the leaf edge scorched and gradually expanded from the lower part of the new shoot to the upper part. The Summer Solstice scorched on the leaves of the old tree at the end of summer, sometimes the leaves were turquoise, and then the leaf margin curled parallel to the main vein, faded, and then burned. Solution: spray 0.2%-0.3% potassium dihydrogen phosphate during the growing season, or apply potassium sulfate to the soil. Lack of calcium, the tip of the young leaves curled like a hook, and became brown and scorched a few days later. Solution: calcium preparation GA calcium treasure, Merrill Lynch efficient calcium, calcium lactate and other good results. Lack of molybdenum, leaf interveinal chlorosis, or even yellowing, easy to appear yellow or orange spots of different sizes, leaf slender deformity, leaf margin curled upward into a cup, and finally the mesophyll fell off and incomplete. Solution: spray 1.2% ammonium molybdate solution on the leaf. Click to get more cherry planting techniques click to get more fruit planting techniques