Resistance of Leptochloa chinensis populations to cyhalofop-butyl in rice fields of eastern China
Received:August 01, 2018    Download the full
DOI:10.16801/j.issn.1008-7303.2019.0049
Key Words:rice fields  Leptochloa chinensis  cyhalofop-butyl  acetyl CoA carboxylase (ACCase)  resistance
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Author NameAffiliationE-mail
WU Xiangwen Shanghai Agricultural Technology Extension Service Center, Shanghai 201103, China shzbwxw@163.com 
WANG Faguo Qingdao Kingagroot Chemical Compound Co., Ltd., Qingdao 266071, Shandong Province, China  
CAO Qing Qingdao Kingagroot Chemical Compound Co., Ltd., Qingdao 266071, Shandong Province, China  
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Abstract:
      Whole-plant bioassay experimernts were conducted to investigate the resistance level of Leptochloa chinensis (L.)Nees populations to cyhalofop-butyl in rice fields of eastern China. Results showed that population LC-17-276, LC-17-281, LC-17-282, LC-17-283, LC-17-289 and LC-17-290 had evolved high resistance to cyhalofop-butyl, with resistance index of 16, 21, 27, 30, 12 and 15, respectively. Molecular analyses revealed that the L. chinensis population LC-17-276 has a tryptophan (Trp)-1999-to-serine (Ser) substitution in the CT domain of the ACCase gene, whereas no mutation was detected for the other 9 resistant populations. To the best of our knowledge, this is the first report of Trp-1999-Ser mutation in L. chinensis. These results showed that L. chinensis was extensively resistant to cyhalofop-butyl in some paddy fields in eastern China.
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