缩果病是由缺硼而引起的生理性病害,可引起不同程度的枯梢症和缩果症。枯梢症以春季长出新梢嫩叶后发病重,多从新梢顶部向下干枯。枯梢的下部侧芽萌发出大量小叶,叶厚而脆,形成“簇状叶”;缩果症主要是果皮出现水渍斑块,果肉失水 Fruit shrinkage is caused by lack of boron physiological diseases, can cause varying degrees of Shock and shrinkage disease. Shoot-tip disease grows in spring after the emergence of tender young leaves, mostly from the top of the shoot dry down. Shoots of the lower lateral bud sprouting a large number of leaflets, thick and brittle leaves, forming a “cluster of leaves”; shrinkage disease mainly peel water stains appear, the pulp dehydration