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合欢是一种优良的绿化树种,对二氧化硫、氯气等有毒气体有较强的抗性,通常栽植于庭院中,也可作行道树栽植,适生栽植的地域广泛。近些年来,其枯萎病的发生危害严重,严重影响合欢植株的观赏价值。危害症状种子带菌,发芽后感病会使芽变褐、腐烂;幼苗期发病植株生长衰弱,叶片发黄,以后少数叶片开始枯萎,最后扩展至全株,此时根及茎基部已经软腐,植株枯死;成年大树被病
Acacia is a kind of excellent afforestation tree species, it has strong resistance to poisonous gas such as sulfur dioxide, chlorine gas and so on. It is usually planted in the courtyard. In recent years, the occurrence of wilt disease is seriously endangered, seriously affecting the ornamental value of Acacia plants. Harmful symptoms of seed carrying germination of the disease will brown buds, decay; Seedling disease plants grow weak, yellow leaves, after a few leaves began to wilt, and finally extended to the whole plant, then the roots and stem base has been soft rot, Plants die; adult trees are sick