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Journal of Integrative Agriculture  2018, Vol. 17 Issue (07): 1556-1562    DOI: 10.1016/S2095-3119(17)61787-8
Special Focus: Regularity of population occurrence and migration in the oriental armyworm, Mythimna separata (Walker) Advanced Online Publication | Current Issue | Archive | Adv Search |
Insecticide resistance of the field populations of oriental armyworm, Mythimna separata (Walker) in Shaanxi and Shanxi provinces of China
ZHAO Yu-yu1*, SU Li2*, LI Shuai1, LI Yi-ping1, XU Xiang-li1, CHENG Wei-ning1, WANG Yi3, WU Jun-xiang1
1 State Key Laboratory of Crop Stress Biology in Arid Areas/College of Plant Protection, Northwest A&F University, Yangling 712100, P.R.China
2 Department of Plant Protection, Agricultural College, Guangxi University, Nanning 530005, P.R.China
3 College of Agriculture, Shanxi Agricultural University, Taigu 030800, P.R.China
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Abstract  
Resistance of five field populations of Mythimna separata (Walker) collected from Shaanxi and Shanxi provinces of China to six different insecticides was evaluated by leaf dip method in the laboratory.  The results showed that all populations were relatively sensitive to emamectin benzoate with a resistance ratio (RR) of 0.583–1.583 folds.  All populations showed susceptible or low level resistance to chlorantraniliprole and beta-cypermethrin.  Compared with a relatively susceptible strain of M. separata, the resistance level of the whole populations ranged from susceptible to moderate to chlorpyrifos and lambda-cyhalothrin, moderate to high to phoxim (RR=19.367–70.100) except for population from Sanyuan County (RR=2.567).  Pair-wise correlation analysis among different insecticides indicated that chlorpyrifos has a significantly positive and significant correlation with emamectin benzoate.  Chlorantraniliprole didn’t have significant correlation with emamectin benzoate, chlorpyrifos and phoxim.  Therefore, emamectin benzoate, chlorantraniliprole and beta-cypermethrin are recommended to control oriental armyworm.  Meanwhile, to postpone the occurrence and development of insecticide resistance in Shaanxi and Shanxi provinces, alternative and rotational application of insecticides between chlorantraniliprole and emamectin benzoate or chlorpyrifos is necessary.
 
Keywords:  Mythimna separata (Walker)        insecticides        toxicity bioassay  
Received: 04 July 2017   Accepted:
Fund: The study was supported by the Special Fund for Agro-scientific Research in the Public Interest of China (201403031) and the Research Project Program of Agricultural Science and Technology innovation Transformation in Shaanxi Province, China.
Corresponding Authors:  Correspondence WU Jun-xiang, Mobile: +86-18092716199, E-mail: junxw@nwsuaf.edu.cn    
About author:  ZHAO Yu-yu, E-mail: zhaoyuyu70@gmail.com; SU Li, E-mail: bluelily8899@163.com; * These authors contributed equally to this study.

Cite this article: 

ZHAO Yu-yu, SU Li, LI Shuai, LI Yi-ping, XU Xiang-li, CHENG Wei-ning, WANG Yi, WU Jun-xiang. 2018. Insecticide resistance of the field populations of oriental armyworm, Mythimna separata (Walker) in Shaanxi and Shanxi provinces of China. Journal of Integrative Agriculture, 17(07): 1556-1562.

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