5月下旬以来大范围连续降雨和快速升温,为苹果早期落叶病菌的侵染、繁殖创造了极为有利的温、湿度条件。目前,虽大部分苹果主产区早期落叶病正处于发生初期,但局地如扶风、岐山等地发生较重,平均病园率分别为75%、65%,病叶率为4%、2.2%。随着进入夏季气温快速回升,降 Since late May, a wide range of continuous rainfall and rapid warming have provided extremely favorable temperature and humidity conditions for the infection and reproduction of apple early leaf droppings. At present, most early blight diseases are still occurring in the main producing areas of apple. However, the prevalence rates are 75% and 65% in the areas such as Fufeng and Qishan respectively, and the rate of diseased leaves is 4% and 2.2 %. With the rapid rise in temperature into the summer, down