甘肃省天水市是我国苹果种植最适宜地区之一。目前全市已建成优质苹果园6.7万hm2,挂果面积5.5万hm2,年产量100多万t。但近年来各种苹果病虫害频发,严重影响果品质量的提高,其中苹果锈病(Gymnosporangium yamadaiMouabe)是生产上的主要病害之一,且随着退耕还林和道路绿化桧柏类? Tianshui City, Gansu Province is one of the most suitable areas for apple cultivation in China. At present, the city has built a high-quality apple orchard of 67,000 hm2, with an area of ​​55,000 hm2 of fruit and annual output of over 1 million t. However, the frequent occurrence of various apple pests and diseases in recent years has seriously affected the improvement of fruit quality. Among them, Gymnosporangium yamadai Mouabe is one of the major diseases in production. With the return of cultivated land to forests and the greening of juniper trees,