[1]Shandong Institute of Pomology;
Tai an 271000;
China;
[1]Shandong Institute of Pomology;
Tai an 271000;
China;
[1]Shandong Institute of Pomology;
Tai an 271000;
China;
[1]Shandong Institute of Pomology;
Tai an 271000;
China;
Apple; Bagging time; Quality; Diseases and pests;