所谓龙眼花期的“四怕”，即一怕花期传粉媒介少。龙眼同一株树上的雄、雌花一般交错开放，若花期蜂类、蝇类、蝶类等传粉昆虫少，不利于龙眼传粉受精的正常进行。二怕花期连绵阴雨。龙眼花期在４月中旬至５月下旬，雌花开放期一般集中在５月上旬至中旬，若雌花期遇连绵阴雨，? The so-called longan flowering “four fear”, that is, a little afraid of flowering medium less. Longan trees on the same male and female flowers staggered open, if the time bees, flies, butterflies and other pollinating insects less conducive to the normal process of longan pollination and fertilization. Second fear of flowering rainy. Longan florescence in mid-April to late May, female flowers are generally open in early May to mid-May, if the female flowers in case of continuous rain,?