脐橙的裂果。日灼和脐黄是三大生理性病害,许多初种者缺乏防治经验。有些栽培脐橙最早的专业户在防治脐橙裂果、日灼和脐黄方面积累了丰富的经验,有效地控制了病害的发生。现介绍如下,供各地参考: Navel orange cracked fruit. Sunburn and umbilical yellow are three major physiological diseases, many early seedlings lack of experience in prevention and treatment. Some of the earliest specialized households that cultivated navel orange have accumulated rich experience in the prevention and treatment of navel orange crack, sunburn and navel yellow, effectively controlling the occurrence of diseases. Now introduced as follows, for reference: