柑桔果实贮藏过程中常大量发生褐斑(又称干疤、塌皮、坐蒂、走泌等),特别在甜橙类长期贮藏中为害重,发生率20—50%,严重时可达50—90%。褐斑初生时仅在果皮油胞层显褐色革质病斑,后渐扩大并深达白皮层,以至果肉,使果肉发生异味,并因病菌滋生蔓延,发生腐烂。虽初期褐斑 Occurred during the storage of citrus fruits, brown spots (also known as dry scar, collapsed skin, sitting pedicel, excretion, etc.) often occur during the storage of citrus fruits, especially in the long-term storage of sweet oranges. The incidence is 20-50% -90%. Brown spots in the first generation of peel oil cell was brown leathery lesions, gradually enlarged and deep white cortex, as well as the flesh, the flesh odor, and due to the spread of germs, decay occurs. Although the initial brown spots