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前言苹果轮纹病Physalospora piricola Nose,是为害苹果果实和枝干的一种重要病害,在河北、河南、山东、辽宁、北京、天津等地普遍发生。近几年发展日趋严重,很多果园常因此遭受严重损失。如1978年济南某果园金冠被害果达60-70%,1980年昌黎果树所白龙品种被害42.06%。此病在贮藏期还大量发生,是当前急待研究解决的病害之
Preface Physalospora piricola Nose, an apple tree disease, is an important disease that damages the apple fruit and branches. It occurs in Hebei, Henan, Shandong, Liaoning, Beijing and Tianjin. In recent years, the development has become increasingly serious, and many orchards often suffered serious losses. Such as the Golden Fruit in Jinan in 1978 orchard Golden Delicious was up to 60 - 70%, 1980 Changli fruit trees were white dragon 42.06% of the victims. The disease also occurs in large quantities in storage, is the urgent need to study and solve the disease