Water heart disease is commonly known as "sugar heart", also known as saccharification disease and honey fruit disease, which will lead to poor fruit quality and intolerance to storage. Originally common in apples. However, with the continuous expansion of pear planting area and the increase of sugar content of pear varieties, pear gradually appeared water heart disease.
Water heart disease is caused by sugar accumulation and imbalance of calcium and nitrogen, because these conditions will disrupt the normal growth habits of fruits. Water heart disease will occur during fruit ripening and storage, and improper fertilization will aggravate the disease. To prevent and control water heart disease, it is necessary to improve soil fertility, apply more organic fertilizer, promote the root development of fruit trees and increase the ratio of potassium to calcium. Secondly, adjusting the fruit load can be achieved by pruning, thinning flowers and thinning fruits. In addition, harvest in time.