出现这种情况,大概有以下原因:①主干内有蛀心虫;②盆中有蚂蚁穴;③冬季盆土长涝过湿;④冬季土壤过干、温度过低,造成干冻;⑤结果期没有注重肥水管理,植物本身营养耗尽;⑥生长期超量施肥或施生肥;⑦修剪不当。遇此现象,首先要仔细检查主干枝,用刀尖戳之,如有蛀心虫能戳进去(组织比较软)。其次清除蚂蚁穴。另外注意冬季盆土不要过湿,视情况一周浇一次水即 Occurrence of this situation, probably for the following reasons: ① bore moth worms; ② ants in the pot; ③ basin floods over wet; ④ winter soil over-drying, the temperature is too low, resulting in dry; ⑤ results Period did not focus on fertilizer and water management, plant nutrition depleted itself; ⑥ growth over fertilization or fertilization; ⑦ improper pruning. In the event of this phenomenon, we must first carefully check the main branch, with a knife poke, if the worm can poke in (tissue is relatively soft). Second, clear the ant hole. Also note that winter pentu do not over-wet, depending on circumstances, pour water once a week that is