1　主要病害1 1　脚腐病　为害症状 :植株根颈部皮层呈水渍状 ,褐色湿腐 ,具酒糟味并渗出胶液。在潮湿多雨季节 ,病害快速扩展到形成层以至木质部。严重时 ,根颈部树皮腐烂。气候干燥时 ,皮层硬化干缩。影响植株生长 ,叶片变黄、变小 ,缺乏光泽 ,极易脱落。防治方法 :选用抗病 1 main disease 1 1 foot rot disease symptoms: plant root neck cortex was water-like, brown wet rot, with a smell of lees and exudative glue. In wet and wet seasons, the disease spreads rapidly to the formation and to the xylem. Serious neck decay bark. When the climate is dry, the cortex hardens and shrinks. Affect plant growth, leaves turn yellow, smaller, lack of luster, easy to fall off. Prevention and treatment methods: use disease-resistant