柑桔的两次生理落果是一种自然现象。但是1981年6月在赣北的宜春、上饶、九江以及抚州等地区的广大柑桔生产基地,尤其是温州蜜柑新区曾发生了前所未有的大量落果。对此,我们进行了实地调查研究。 一、异常落果的程度及特点 1.落果程度:这次六月下旬特重的异常落果 Two physiological drop-outs of citrus are a natural phenomenon. However, in June 1981, the vast majority of citrus production bases in Yichun, Shangrao, Jiujiang, and Fuzhou in northern Jiangxi Province, especially the Wenzhou Citrus New District, experienced an unprecedented drop of fruit. In response, we conducted field research. First, the extent and characteristics of abnormal fruit drop 1. Degree of fruit loss: the extraordinary heavy drop in late June this year