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苹果早期落叶病是一种常见病害,如防治不及时,导致叶片脱落,光合作用机能面积减少,影响养分积累和花芽分化与形成,削弱树势。据观察,我组果园发生的苹果早期落叶病病症有褐斑病、灰斑病、轮斑病3种类型。发病品种主要(?)金冠。为保证果树的正常生育,保护枝条叶片的完整,在加强综合管理的基础上,于1979—1982年对该园发生的早期落叶病的症状和发生规律进行观察和防治,取得了较好的效果。
Early apple leaf deciduous disease is a common disease, such as control is not timely, leading to loss of leaves, photosynthesis function area decreases, affecting nutrient accumulation and flower bud differentiation and formation, weaken the tree vigor. It is observed that the occurrence of apple early leaf deciduous disease in our group orchard has brown spot, gray spot and spot blotch. The main varieties of disease (?) Golden Delicious. In order to ensure the normal fertility of fruit trees and protect the integrity of branches and leaves, on the basis of strengthening integrated management, the symptoms and occurrence of early deciduous diseases occurred in the park were observed and controlled in 1979-1982, and achieved good results .