苹果轮纹病（PhysalosporapiricolaNose）是危害苹果果实、枝干的主要病害。烟台地区每年因该病烂果率平均在１０％～２０％，个别雨水多年份达３０％～５０％。因该病原菌是前期侵染，后期发病，侵染潜伏时间长达三个多月，农药防治难度很大，筛选高效低毒杀菌剂尤为迫切。为 Apple rot disease (Physalospora piricolaNose) is endangering apple fruit, the main branch disease. The annual rate of rotten fruit in Yantai is 10% ~ 20% due to the disease and 30% ~ 50% in individual rainy years. Because the pathogen is pre-infection, late onset, latent infection latency of up to more than three months, pesticide prevention and treatment is very difficult, screening of high efficiency and low toxicity fungicides is particularly urgent. for