苹果斑点落叶病是近几年早期落叶病中发生最为严重的类型之一,在陕西渭北果区南缘水灌区危害更重,常常造成叶片早期脱落,影响树体生长、花芽形成和果实产量及品质。该病主要危害嫩叶,也危害嫩枝和果实,展叶后15～20天内的叶片极易受害。果实受害在近成熟期。过去常用的杀菌剂波尔 Apple spotted leaf deciduous disease is one of the most serious types of early deciduous disease in recent years. It is more dangerous in the water irrigation area on the southern edge of Weibei Fruit Region in Shaanxi Province, and often causes early leaf fall, affecting the growth of tree, flower bud formation and fruit yield And quality. The disease is mainly endangering young leaves, but also endangering twigs and fruits, leaves vulnerable to damage within 15 to 20 days after unfolding. Fruit damage in near maturity. Boer, a bactericide commonly used in the past