苹果斑点落叶病为我国北方苹果产区落叶病中第一大病害。主要发生在展叶不久的幼嫩叶片上,1年生枝条及果实的各个生长期都能受害,尤以红星,青香蕉,印度等品种感病最重,常常8月下旬即落叶,并导致当年2次开花,严重影响产量、品质及翌年花芽形成。 Apple spotted leaf deciduous disease in northern apple-growing areas in northern China’s largest disease. Mainly occurs in the young leaf foliage soon, the annual growth of branches and fruits can suffer, especially red star, green banana, India and other varieties of the most susceptible, often in late August that leaves, and led to the year 2 flowering, seriously affecting the yield, quality and flower bud formation the following year.