苹果腐烂病是危害果树之“大敌”,轻者局部溃烂坏死,重者全枝全树死亡。特别是在果树突然遭受大的冻害之后,此病发生发展更为迅猛。腐烂病发生与否及危害轻重,除与温度等自然因素和品种有关外,而与栽培管理技术更有着密切关系。实践证明,凡是管理及时,肥水供应好,消灭草荒,合理负担产量,注意树体保护和果园清洁的,树体都比较健壮,危害就轻,甚至不发病;反之就容易发病或危害成灾。 根据在塔城垦区调查,苹果腐烂病的症状,因发病时期和部位不同,一般分溃疡型和枯枝型两种:(1)溃疡型多出现于主干、主枝、侧枝上。初发病时表皮并无明显变 Apple rot disease is the “enemy” that endanger the fruit trees, light local ulceration and necrosis, heavy all the whole tree died. Especially in the fruit trees suddenly suffered a large frost damage, the disease occurs more rapidly. The occurrence of rot disease and its harmfulness are not only related to natural factors and varieties such as temperature, but also closely related to cultivation and management techniques. Practice has proved that any management in a timely manner, fertilizer and water supply is good, the elimination of grass waste, a reasonable burden of production, pay attention to tree protection and orchard cleaning, the trees are relatively robust, harm is light, or even disease; the other is easy to disease or endanger disaster. According to the investigation in Tacheng reclamation area, the symptoms of apple rot disease are divided into two types: ulcer type and dead branch type because of the different stages and different parts of the disease. (1) Ulcers mostly appear on the trunk, main branches and collateral branches. The initial onset of the epidermis and no significant change