摘要
【目的】明确香蕉枯萎病4号生理小种在广西的发生实况和广西现有香蕉品种对香蕉枯萎病4号生理小种的抗性水平,为制定相应的防控措施提供参考。【方法】在广西香蕉产区随机选择23个村,每村抽取2～3个点,调查香蕉枯萎病4号生理小种的发生情况。用伤根接种法测定11个香蕉品种对香蕉枯萎病4号生理小种的抗性水平。【结果】南宁市西乡塘区、隆安县、钦州市、武鸣县和龙州县均发现香蕉枯萎病4号生理小种发生为害,大多数发病地块的病株率在1.00%～14.00%,病情指数在0.50～10.00,田东县调查点没有发现香蕉枯萎病4号生理小种为害。11个香蕉品种除金粉1号病情指数为50.00,为感病品种(S)外,其他品种病情指数在70.00～100.00,为高感品种(HS)。【结论】香蕉枯萎病4号生理小种已在广西部分产蕉区零星发生,正处于病原菌菌量累积阶段;目前广西栽种的香蕉品种均为感病或高感品种,抵御能力差,需加强对香蕉枯萎病的防控力度。
[Objective]Occurrence status of Fusariurn oxysporum f.sp. cubense tropical race 4 in Guangxi was surveyed and the resistance of banana varieties cultivated in Guangxi against Fusarium oxysporum f.sp. cubense tropical race 4 was also studied to provide references for formulating the corresponding prevention and control measures. [Method]The condition of Fusariurn oxysporum f.sp. cubense tropical race 4 infecting the banana was investigated in 2-3 spots of 23 villages randomly chosen from Guangxi was. Furthermore, the resistance of eleven banana varieties cultivated against Fusariurn oxysporurn f.sp. cubense tropical race 4 was determined using injury root inoculation method. [Result]Fusadum oxysporurn f.sp. cubense trop- ical race 4 was found in Qinzhou City, Wuming County, Longan County, Longzhou County, and Xixiangtang District, in which the diseased plant rates were 1.00%-14.00%. All of the eleven banana varieties were highly sensitive （disease index： 70.00- 100.00） to Fusariurn oxysporurn f.sp. cubense tropical race 4 except Jinfen 1 which was sensitive （disease index： 50.00）. Fusari- urn oxysporurn f.sp. cubense tropical race 4 was not present in the investigation spots of Tiandong County. [Conclusion ]Fusad- urn oxysporurn f.sp. cubense tropical race 4 was found sporadical in a part banana production area of Guangxi and propagated rapidly. Since banana varieties cultivated in Guangxi were highly sensitive or sensitive to Fusadum oxysporum f.sp. cubense tropical race 4, their disease-resistant ability was poor. More efforts should be made to prevent and control Fusarium oxysporum f.sp. cubense tropical race 4.
出处
《南方农业学报》
CAS
CSCD
北大核心
2013年第5期769-772,共4页
Journal of Southern Agriculture
基金
广西科学研究与技术开发计划项目(桂科攻1123003-8)
广西农业科学院基本科研业务专项项目(桂农科2011YZ16
桂农科2012YM15)
关键词
香蕉
香蕉枯萎病4号生理小种
品种抗性
广西
banana
Fusarium oxysporum f.sp. cu]3ense tropical race 4
variety resistance
Guangxi
