广西香蕉枯萎病的发生与病原鉴定

Occurrence and identification of banana vascular wilt in Guangxi

2001-2006年对广西主要产蕉区的24个市（县）的67个点进行了镰刀菌枯萎病调查，调查的品种有香蕉、红蕉、西贡蕉、牛角蕉以及野生蕉。调查结果发现，镰刀菌枯萎病对西贡蕉为害较为严重，病株率为4．5％～73．5％，而在香蕉和野生蕉资源材料上未发现枯萎病株；经病原菌致病性接种测定和PCR鉴定，确定广西主要蕉区发生的西贡蕉枯萎病是由香蕉镰刀菌枯萎病病原菌1号生理小种引起，在广西至今没有发现该病4号生理小种发生为害。

Fusarium wilt disease at 67 spots in 24 cities and counties in Guangxi were investigated during 2001 2006, the investigated varieties included banana （Musa sapientum L. AAA）, ＂Xi-gong banana＂ （Musa paradisiaca L. ABB）, ＂Niu-jiao banana＂ （ABB）and wild banana material. The results showed that ＂Xi-gong＂ banana was infected more seriously （the rate of infected plant ranged from 8.5% to 73.5%） ,but there was no suffered plant found in banana（ Musa sapientum L. AAA） and wild banana material. After the determination of the pathogen infection and PCR identification,it is concluded that the pathogen of ＂Xi-gong＂ banana wilt disease was infected by Fusarium oxysporum f. cubense race 1, and no signs of race 4 pathogen has been found in Guangxi.