【摘要】 对广西6种外来相思(马占相思、直干相思、纹荚相思、厚荚相思、杂交相思和黑木相思)的病害进行调查,发现主要病害有4种,次要病害3种,并提出防治方法。相思炭疽病病原为胶孢炭疽菌(Col-letotrichum gloeosporioides),在马占相思、直干相思、纹荚相思、厚荚相思和杂交相思的叶状柄上只产生病原菌的无性阶段,而在厚荚相思叶状柄上可同时出现无性阶段和有性阶段;相思白粉病病原为白粉菌(Oidi-umsp.),为害马占相思、厚荚相思和杂交相思的叶状柄和嫩枝,其中杂交相思白粉病发生普遍而严重,发病期多在3~5月;黑木相思叶状柄尖枯病病原为异色拟盘多毛孢(Pestalotiopsis versicolor),一年四季均可发病;马占相思心腐病,主要发生在树干基部,造成木材的大量损失,病原尚未得到确定。更多还原

【Abstract】 Diseases of 6 species of imported Acacia in Guangxi were surveyed,four major diseases and three minor diseases were found and control methods were proposed.Pathogen of Acacia anthracnose was Colletotrichum gloeosporioides,asexual stage of which was found on Acacia mangium, A. crassicarpa,A.auriculiformis, A. aulatocarpa and hybridized acacia (A. mangium ×A.auriculiformis) and sexual stage was only found on phyllode of A. crassicarpa.Powdery mildew caused by Oidium sp. was found on A. mangium, A. crassicarpa and hybridized Acacia and it was prevalent on hybridized Acacia from March to May.Phyllode-tip blight of A.melanoxylon caused by Pestalotiopsis versicolor took place in round year.Heart rot which caused serious timber damage occurred on base stem of A. mangium and its pathogens had not been identified.更多还原