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《Journal of Yunnan Agricultural University》 2008-04
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Studies on Control Effect of Hot Water Treatment on Sugarcane Ratoon Stunting Disease by and Its Influence on Regenerative Plants

SHEN Wan-kuan,CHEN Zhon-hua,YANG Zhan-duan,DENG Hai-hua(Guangdong Key Laboratory of Sugarcane Improvement and Biorefinery,Guangzhou Sugarcane Industry Research Institute,Guangzhou 510316,China)  
Since sugarcane ratoon stunting disease(RSD) has caused a lot of serious damage in China,It is very necessary to study the control method of RSD.Using RSD-infected seedcanes of 2 sugarcane varieties,YT00-236 and ROC22,as materials,the control effect of hot water treatment(HWT) at 50℃ for 2 hours on RSD was studied,combined with dot blot enzyme immunoassays(DB-EIA) to detect causal bacterium of RSD,Leifsonia xyli subsp.Xyli(Lxx).Meanwhile,comparative planting experiment between the YT00-236 seedcanes with HWT and its diseased seedcanes without HWT in the field was conducted to reveal the influence of HWT on regenerative plants.The results showed that HWT at 50℃ for 2 hours could extremely significantly reduce the population of Lxx in RSD-infected seedcanes,but complete elimination of Lxx was very difficult.The stalk length,internodal length and stalk weight significantly increased,the number of millable stalks per plot raised extremely significantly,the growth speed accelerated and the yield increased by 23.2%,respectively,of regenerative plants from the seedcanes with HWT,compared with those of RSD-infected seedcanes without HWT,but their qualities in maturity phase were similar.In addition,HWT could slightly injure cane buds and reduce germination rate of buds.It was concluded that HWT was an effective method of control of RSD,could promote plant growth and significantly increase cane yield.
【Fund】: 广东省科技攻关项目(2006A20207001);; 农业部“948”重大项目(2006-G37)
【CateGory Index】: S435.661
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