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Gao P, Zhang Z, Shen J, Mao Y, Wei S, Wei J, Zuo R, Li R, Song X, Qiang S. Weed seed bank dynamics responses to long-term chemical control in a rice-wheat cropping system. PEST MANAGEMENT SCIENCE 2020; 76:1993-2003. [PMID: 31867840 DOI: 10.1002/ps.5731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/16/2019] [Accepted: 12/22/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND It remains an open question if the long-term application of single chemical herbicides would inevitably lead to increased weed populations and result in out-of-control weeds. The annual dynamics of weed seed bank responses to different weeding measures (chemical herbicide, hand weeding and no weeding) in rice-wheat cropping systems were compared to observe the succession of weed communities under different weed selection pressures for 17 years. RESULTS In unweeded rice-wheat cropping plots, the initially dominant broadleaf weeds were overtaken by grasses and eventually by sedges, while in plots subjected to chemical herbicide or hand weeding, broadleaf weeds remained dominant followed by grasses. The rice-wheat cropping system favoured the spread of paddy weed species; weeding had little effect on the composition of the dominant rice weeds but greatly influenced that of wheat weeds. Total seed density tended to decrease in both weeded and unweeded plots, but the species density and composition of the seed banks differed among plots treated differently. Weeding slightly increased weed species diversity and decreased weed community evenness and dominance in the first several years, but this scenario could have negative consequences in the long term; however, without weeding, stronger interspecific competition led to a decrease in weed species diversity whereas weed community evenness and dominance increased. CONCLUSION Long-term and repeated application of pre-emergence chemical herbicides and hand weeding had similar effects on the weed community dynamics, indicating that exclusive application of pre-emergence herbicide could maintain the weed community at a durable relatively low infestation level. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Pinglei Gao
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Zheng Zhang
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Junming Shen
- Food Crops Research Laboratory, Jiangsu Yanjiang Institute of Agricultural Sciences, Nantong, P. R. China
| | - Yuxiang Mao
- Food Crops Research Laboratory, Jiangsu Yanjiang Institute of Agricultural Sciences, Nantong, P. R. China
| | - Shouhui Wei
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Jiguang Wei
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Ranling Zuo
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Ruhai Li
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Xiaoling Song
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
| | - Sheng Qiang
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, P. R. China
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Liu B, Ding F, Wang M, Wang F, Luo X, Li L. Cross-resistance pattern to ACCase-inhibiting herbicides in a novel Trp 1999Leu mutation American sloughgrass (Beckmannia syzigachne) population. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 159:80-84. [PMID: 31400787 DOI: 10.1016/j.pestbp.2019.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 05/18/2019] [Accepted: 05/25/2019] [Indexed: 05/13/2023]
Abstract
The plastid acetyl coenzyme carboxylase (ACCase) Trp1999Leu mutation was identified in a Beckmannia syzigachne population resistant to fenoxaprop-p-ethyl. The pattern of cross-resistance for the Trp1999Leu mutation is still ambiguous. In this paper, mutant homozygote (1999Leu/Leu, RR) and wild type (1999Trp/Trp, SS) B. syzigachne plants with the same genetic background were purified from the JS-26 population using the dCAPS method. The activity of ACCase in RR and SS was determined. Then, the cross-resistance pattern to ACCase inhibiting herbicides of the Trp1999Leu mutation was determined using the whole-plant method. ACCase activity showed that the Trp1999Leu mutation decreased ACCase sensitivity to fenoxaprop-p-ethyl by 2.73-fold. A dose-response experiment indicated that the Trp1999Leu mutation conferred high resistance to quizalofop-p-ethyl (20.29-fold), metamifop (12.22-fold) and pinoxaden (18.60-fold), moderate resistance to fenoxaprop-p-ethyl (8.20-fold) and sethoxydim (6.38-fold), low resistance to cyhalofop-butyl (2.73-fold) and no resistance to clodinafop-propargyl (1.42 fold) and clethodim (1.59-fold). This is the first report of the role of Trp1999Leu in fenoxaprop-p-ethyl resistance and of the patterns of cross-resistance to ACCase-inhibiting herbicides in B. syzigachne.
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Affiliation(s)
- Bingqi Liu
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Fei Ding
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Mingliang Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Fei Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China
| | - Xiaoyong Luo
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Lingxu Li
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China.
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Chen G, Xu H, Zhang T, Bai C, Dong L. Fenoxaprop-P-ethyl resistance conferred by cytochrome P450s and target site mutation in Alopecurus japonicus. PEST MANAGEMENT SCIENCE 2018; 74:1694-1703. [PMID: 29337421 DOI: 10.1002/ps.4863] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 11/15/2017] [Accepted: 01/09/2018] [Indexed: 05/13/2023]
Abstract
BACKGROUND Alopecurus japonicus is a serious grass weed species in wheat fields in eastern Asia, and has evolved strong resistance to acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. Although target-site resistance (TSR) to ACCase inhibitors in A. japonicus has been reported, non-target site resistance (NTSR) has not. This study investigated both TSR and NTSR in a fenoxaprop-P-ethyl-resistant A. japonicus population (AHFD-3), which was collected in Feidong County, Anhui Province, China. RESULTS We found that AHFD-3 exhibited high resistance to fenoxaprop-P-ethyl and low resistance to flucarbazone-sodium. The sensitivity of AHFD-3 to fenoxaprop-P-ethyl increased significantly after treatment with cytochrome P450 (P450) inhibitors; however, such synergies between P450 inhibitors and fenoxaprop-P-ethyl were not found in two control populations. Sequences of the entire carboxyltransferase domain of A. japonicus ACCase were obtained, and AHFD-3 plants showed an Asp-2078-Gly substitution in the ACCase. With the derived cleaved amplified polymorphic sequence (dCAPS) method, we found that 85.4% of the plants of AHFD-3 carried this mutation. The P450 content in AHFD-3 plants was significantly higher than those of the two control populations after treatment with fenoxaprop-P-ethyl. Ten partial sequences of P450 genes in A. japonicus were cloned. Three P450 genes were up-regulated 12 h after fenoxaprop-P-ethyl treatment, which were all from the P450 subfamily CYP72A. Moreover, a P450 gene from the P450 family CYP81 was up-regulated after fenoxaprop-P-ethyl treatment in all populations studied. CONCLUSION Fenoxaprop-P-ethyl resistance in AHFD-3 plants was conferred by up-regulation of cytochrome P450s in the CYP72A subfamily and target site mutation of the ACCase gene. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Guoqi Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Hongle Xu
- Institute of Plant Protection, Henan Province Academy of Agricultural Sciences, Key Laboratory of Crop Pest Control in Henan Province, Zhengzhou, China
| | - Teng Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Congqiang Bai
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
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Yu J, Gao H, Pan L, Yao Z, Dong L. Mechanism of resistance to cyhalofop-butyl in Chinese sprangletop (Leptochloa chinensis (L.) Nees). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:306-311. [PMID: 29183606 DOI: 10.1016/j.pestbp.2016.11.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 10/31/2016] [Accepted: 11/08/2016] [Indexed: 06/07/2023]
Abstract
Chinese sprangletop (Leptochloa chinensis (L.) Nees) is a serious grass weed in rice paddies. In some areas, L. chinensis has become resistant to the herbicide cyhalofop-butyl because of its frequent and extensive use over the past five years. In this study, whole-plant dose-response assays were conducted, and a L. chinensis population (ZHYH) had a 75.8-fold resistance index to cyhalofop-butyl. Molecular analyses revealed that this resistance was attributed to a tryptophan (Trp)-2027-to-cysteine (Cys) substitution in the CT domain of the ACCase gene. To our knowledge, this is the first report revealing the mechanism underlying cyhalofop-butyl resistance in L. chinensis. Furthermore, a derived cleaved amplified polymorphic (dCAPS) assay was developed to rapidly detect the Trp-2027-Cys mutation. Of the 100 ZHYH plants analyzed, 52 were heterozygous mutants and 48 were susceptible homozygous plants. In addition, the cyhalofop-butyl-resistant L. chinensis was cross-resistant to aryloxyphenoxypropionate and phenylpyrazoline herbicides, but not to cyclohexanedione, acetolactate synthase-inhibiting, protoporphyrinogen oxidase, and urea herbicides, and had only slight resistance to the hormonal herbicide quinclorac.
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Affiliation(s)
- Jiaxing Yu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Haitao Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Lang Pan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | | | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China.
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Gao Y, Pan L, Sun Y, Zhang T, Dong L, Li J. Resistance to quinclorac caused by the enhanced ability to detoxify cyanide and its molecular mechanism in Echinochloa crus-galli var. zelayensis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:231-238. [PMID: 29183597 DOI: 10.1016/j.pestbp.2017.08.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 07/29/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
Quinclorac, an auxin-type herbicide, is widely used to control barnyardgrass and some dicotyledon weeds. Echinochloa crus-galli var. zelayensis, a variety of E. crus-galli (L.) Beauv., is widespread in China and some populations have resistance to quinclorac. E. crus-galli var. zelayensis seeds with varying sensitivity to quinclorac were used in the present study. The expression of the ADP/ATP carrier protein (ANT) gene, which plays an important role in the maintenance of cellular energy balance, dramatically rose in the S biotype after exposure to quinclorac, while no change was found in two R biotypes. The activity of β-cyanoalanine synthase (β-CAS), which is the key enzyme for cyanide degradation, was higher in two R biotypes than in the S biotype before and after treatment with quinclorac. One single-nucleotide difference was detected in the EcCAS gene of two R biotypes compared with the S biotype. The nucleotide change, which caused one amino acid substitution, replacing Methionine (Met)-295 with Lysine (Lys)-295 in the two R biotypes, which are same as the rice β-CAS gene at this position. In addition, EcCAS gene expression was higher in the two R biotypes than in the S biotype. In conclusion, β-CAS may play a crucial role in the resistance of E. crus-galli var. zelayensis to quinclorac. EcCAS gene mutation and higher gene expression may enhance the activity of β-CAS to avoid the accumulation of toxic cyanide in resistant populations, thus contributing to the resistance mechanism of E. crus-galli var. zelayensis. to quinclorac.
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Affiliation(s)
- Yuan Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Lang Pan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Yu Sun
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Teng Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China.
| | - Jun Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China.
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Bi Y, Liu W, Guo W, Li L, Yuan G, Du L, Wang J. Molecular basis of multiple resistance to ACCase- and ALS-inhibiting herbicides in Alopecurus japonicus from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2016; 126:22-27. [PMID: 26778430 DOI: 10.1016/j.pestbp.2015.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 06/12/2015] [Accepted: 07/10/2015] [Indexed: 06/05/2023]
Abstract
Fenoxaprop-P-ethyl-resistant Alopecurus japonicus has become a recurring problem in winter wheat fields in eastern China. Growers have resorted to using mesosulfuron-methyl, an acetolactate synthase (ALS)-inhibiting herbicide, to control this weed. A single A. japonicus population (AH-15) resistant to fenoxaprop-P-ethyl and mesosulfuron-methyl was found in Anhui Province, China. The results of whole-plant dose-response experiments showed that AH-15 has evolved high-level resistance to fenoxaprop-P-ethyl (95.96-fold) and mesosulfuron-methyl (39.87-fold). It was shown via molecular analysis that resistance to both fenoxaprop-P-ethyl and mesosulfuron-methyl was due to an amino acid substitution of Ile1781 to Leu in acetyl-CoA carboxylase (ACCase) and a substitution of Trp 574 to Leu in ALS, respectively. Whole-plant bioassays indicated that the AH-15 population was resistant to the ACCase herbicides clodinafop-propargyl, clethodim, sethoxydim and pinoxaden as well as the ALS herbicides pyroxsulam, flucarbazone-Na and imazethapyr, but susceptible to the ACCase herbicide haloxyfop-R-methyl. This work reports for the first time that A. japonicus has developed resistance to ACCase- and ALS-inhibiting herbicides due to target site mutations in the ACCase and ALS genes.
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Affiliation(s)
- Yaling Bi
- College of Agronomy, Anhui Science and Technology University, Anhui, Fengyang 233100, PR China; Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China
| | - Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China
| | - Wenlei Guo
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China
| | - Lingxu Li
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China; College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Shandong, Qingdao 266109, PR China
| | - Guohui Yuan
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China
| | - Long Du
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong, Tai'an 271018, PR China.
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Tang W, Zhou F, Zhang Y, Chen J. Resistance of American sloughgrass (Bechmannia syzigachne) populations to ACCase-inhibiting herbicides involves three different target site mutations from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 124:93-6. [PMID: 26453236 DOI: 10.1016/j.pestbp.2015.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 05/06/2015] [Accepted: 05/08/2015] [Indexed: 05/13/2023]
Abstract
American sloughgrass [Beckmannia syzigachne (Steud.) Fernald] is a problematic annual grass weed in winter wheat fields of China, which causes great loss of wheat yield. Repeated use of acetyl-CoA carboxylase (ACCase)-inhibiting herbicides during the last two decades to control this weed has been selected for resistance in American sloughgrass in Jiangsu province. In this study, whole-plant dose-response assays were conducted to investigate the level of resistance in four resistant American sloughgrass populations (LY, JH, BYJ and BYP) to four ACCase-inhibiting herbicides belonging to aryloxyphenoxypropionates, cyclohexanediones, and phenylpyrazolines groups under greenhouse conditions. Based on resistance factor (RF), three populations, LY, BYJ and BYP, were highly resistant to fenoxaprop-P-ethyl, clodinafop propargyl, sethoxydim and pinoxaden. JH plants exhibited resistance to fenoxaprop-P-ethyl and clodinafop propargyl, but showed much lower RF values for sethoxydim and pinoxaden. Molecular analysis of resistance revealed that resistance in all the four populations was target site-based. Results confirmed that substitutions of Ile-1781-Leu, Ile-2041-Asn and Asp-2078-Gly, respectively, in LY, JH and BYJ/BYP, are responsible for diverse sensitivity to different ACCase-inhibiting herbicides in these populations. The substitution at position 1781 had been reported, while it is the first report of Ile-2041-Asn and Asp-2078-Gly mutations that corresponded to resistance in American sloughgrass.
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Affiliation(s)
- Wei Tang
- Zhejiang Branch of National Pesticide R&D South Center, Zhejiang Chemical Industry Research Institute, Hangzhou 310023, China
| | - Fengyan Zhou
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Yong Zhang
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Jie Chen
- Zhejiang Branch of National Pesticide R&D South Center, Zhejiang Chemical Industry Research Institute, Hangzhou 310023, China.
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Yuan G, Liu W, Bi Y, Du L, Guo W, Wang J. Molecular basis for resistance to ACCase-inhibiting herbicides in Pseudosclerochloa kengiana populations. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 119:9-15. [PMID: 25868811 DOI: 10.1016/j.pestbp.2015.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 03/04/2015] [Accepted: 03/05/2015] [Indexed: 06/04/2023]
Abstract
Pseudosclerochloa kengiana is a troublesome annual grass weed of wheat fields in the rice-wheat double cropping areas in China. Resistance has evolved in P. kengiana under continuously selective pressure of ACCase-inhibiting herbicides. Whole-plant experiments showed that two suspected resistant populations 12-SD-12 and 12-SD-13 were highly resistant to fenoxaprop-P-ethyl (69.9- and 57.2-fold); moderately resistant to clodinafop-propargyl (5.9- and 4.1-fold) and pinoxaden (4.4- and 3.5-fold); lowly resistant to fluazifop-P-butyl (2.2- and 2.0-fold) and sethoxydim (1.8- and 1.6-fold), but were sensitive to clethodim (1.0- and 0.9-fold) and mesosulfuron-methyl (1.1- and 0.9-fold). Molecular analyses confirmed that a Trp1999 to Ser mutation was present in the resistant populations. Two dCAPS markers were also developed to positively determine the wild type Trp and mutant Ser alleles at ACCase position 1999. All 350 individual plants of 12-SD-12 population analysed were heterozygous mutants. Meanwhile, 318 mutant heterozygotes and 32 wild types were detected from the 12-SD-13 population. In addition, the analysis of plant genotype and phenotype showed that all wild type plants were killed after treatment with any one of the ACCase-inhibiting herbicides used, while individual plants carrying the W1999S mutation survived except when treated with clethodim. To our knowledge, this is the first report of pinoxaden resistance and a Trp-1999-Ser mutation in the plastid ACCase for P. kengiana.
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Affiliation(s)
- Guohui Yuan
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Yaling Bi
- College of Plant Science, Anhui Science and Technology University, Fengyang, Anhui 233100, China
| | - Long Du
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Wenlei Guo
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China.
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Pan L, Li J, Xia W, Zhang D, Dong L. An effective method, composed of LAMP and dCAPS, to detect different mutations in fenoxaprop-P-ethyl-resistant American sloughgrass (Beckmannia syzigachne Steud.) populations. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 117:1-8. [PMID: 25619905 DOI: 10.1016/j.pestbp.2014.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 10/09/2014] [Accepted: 10/10/2014] [Indexed: 05/20/2023]
Abstract
The decreased susceptibility of Beckmannia syzigachne to fenoxaprop-P-ethyl is due to the reliance on it to control grass weeds since the 1990s. Loop-mediated isothermal amplification (LAMP), which is a proven simple, rapid, specific, sensitive and inexpensive assay method, has been used to detect the I1781L mutation in B. syzigachne. In the present study, four sets of primers detected four mutations in B. syzigachne, W2027C, I2041A, D2078G and G2096A, using the LAMP method. Additionally, five newly derived cleaved amplified polymorphic sequence (dCAPS) markers were developed to detect five different mutations. With a method composed of LAMP and dCAPS, 19 fenoxaprop-P-ethyl-resistant B. syzigachne populations collected in 2013 were studied. An effective method, composed of LAMP and dCAPS, to detect five mutations, I1781L, W2027C, I2041A, D2078G and G2096A, in B. syzigachne populations was developed. With this method, a B. syzigachne population resistant to fenoxaprop-P-ethyl can be studied to confirm its constitution. And we determined that the resistance level might be relevant to the mutation type and mutation frequency. The type of mutation and its frequency in fenoxaprop-P-ethyl-resistant B. syzigachne populations can be confirmed to provide appropriate herbicide management.
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Affiliation(s)
- Lang Pan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing 210095, China
| | - Jun Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing 210095, China
| | - Wenwen Xia
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing 210095, China
| | - Di Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing 210095, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing 210095, China.
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Pan L, Li J, Zhang WN, Dong L. Detection of the I1781L mutation in fenoxaprop-p-ethyl-resistant American sloughgrass (Beckmannia syzigachne Steud.), based on the loop-mediated isothermal amplification method. PEST MANAGEMENT SCIENCE 2015; 71:123-30. [PMID: 24644047 DOI: 10.1002/ps.3777] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/11/2014] [Accepted: 03/12/2014] [Indexed: 05/20/2023]
Abstract
BACKGROUND The increasing use of fenoxaprop-p-ethyl has resulted in evolved resistance in American sloughgrass (Beckmannia syzigachne Steud.). Target-site-based resistance to acetyl-CoA carboxylase (ACCase) inhibitors in B. syzigachne occurs owing to an isoleucine-to-leucine substitution at residue 1781 (I1781L) of the ACCase enzyme. A rapid detection method is needed to identify the resistance-conferring substitution. RESULTS Four populations of B. syzigachne that were resistant to fenoxaprop-p-ethyl and contained the I1781L substitution were identified. Conventional PCR and derived cleaved amplified polymorphic sequence (dCAPS) methods were used to detect the mutation. Additionally, a rapid nucleic acid detection method, loop-mediated isothermal amplification (LAMP), was successfully developed and used to detect the genetic mutation underlying the I1781L substitution in the B. syzigachne ACCase enzyme. CONCLUSION This report is the first to describe the application of a LAMP assay for mutation detection in herbicide-resistant weeds. The assay does not require specialised equipment: only a standard laboratory bath is needed. This technique could be employed for detecting the I1781L substitution in B. syzigachne plants and seeds.
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Affiliation(s)
- Lang Pan
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing, China
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Xu H, Zhang W, Zhang T, Li J, Wu X, Dong L. Determination of ploidy level and isolation of genes encoding acetyl-CoA carboxylase in Japanese Foxtail (Alopecurus japonicus). PLoS One 2014; 9:e114712. [PMID: 25503308 PMCID: PMC4263612 DOI: 10.1371/journal.pone.0114712] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 11/13/2014] [Indexed: 11/21/2022] Open
Abstract
Ploidy level is important in biodiversity studies and in developing strategies for isolating important plant genes. Many herbicide-resistant weed species are polyploids, but our understanding of these polyploid weeds is limited. Japanese foxtail, a noxious agricultural grass weed, has evolved herbicide resistance. However, most studies on this weed have ignored the fact that there are multiple copies of target genes. This may complicate the study of resistance mechanisms. Japanese foxtail was found to be a tetraploid by flow cytometer and chromosome counting, two commonly used methods in the determination of ploidy levels. We found that there are two copies of the gene encoding plastidic acetyl-CoA carboxylase (ACCase) in Japanese foxtail and all the homologous genes are expressed. Additionally, no difference in ploidy levels or ACCase gene copy numbers was observed between an ACCase-inhibiting herbicide-resistant and a herbicide-sensitive population in this study.
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Affiliation(s)
- Hongle Xu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, Beijing, China
| | - Wenpan Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- National Key Laboratory of Crop Genetic & Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing, China
| | - Teng Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, Beijing, China
| | - Jun Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, Beijing, China
| | - Xian Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, Beijing, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, Beijing, China
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Xu H, Li J, Zhang D, Cheng Y, Jiang Y, Dong L. Mutations at codon position 1999 of acetyl-CoA carboxylase confer resistance to ACCase-inhibiting herbicides in Japanese foxtail (Alopecurus japonicus). PEST MANAGEMENT SCIENCE 2014; 70:1894-1901. [PMID: 24497328 DOI: 10.1002/ps.3753] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 01/27/2014] [Accepted: 01/27/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND The intensive and global application of ACCase-inhibiting herbicides has resulted in the evolution of resistance in a growing number of grass weeds. Among the mutations implicated in conferring resistance, limited knowledge is available regarding mutations at codon position 1999. In addition, multiple copies of genes encoding plastidic ACCase have been ignored in previous studies of resistance in Alopecurus japonicus. RESULTS Dose-response tests indicated that the population JLGY-4 had evolved high-level resistance to fenoxaprop-P-ethyl. The carboxyltransferase domain of the ACCase gene in A. japonicus was sequenced and compared. Two loci encoding plastidic ACCase were isolated from both the resistant and sensitive populations. Simultaneously, two resistance-endowing mutations at codon position 1999 of ACCase were determined (W1999C and W1999L). Moreover, a molecular study was conducted to determine the mechanism of resistance to some ACCase-inhibiting herbicides. The W1999C mutation conferred resistance to fenoxaprop and moderate resistance to pinoxaden. The W1999L mutation conferred resistance to fenoxaprop. CONCLUSION This study revealed that A. japonicus had multiple copies of genes encoding plastidic ACCase, and each gene was able to carry its own mutation. It also established the clear importance of the W1999C and W1999L mutations in conferring resistance to ACCase-inhibiting herbicides.
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Affiliation(s)
- Hongle Xu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
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Kaundun SS. Resistance to acetyl-CoA carboxylase-inhibiting herbicides. PEST MANAGEMENT SCIENCE 2014; 70:1405-17. [PMID: 24700409 DOI: 10.1002/ps.3790] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/21/2014] [Accepted: 04/03/2014] [Indexed: 05/12/2023]
Abstract
Resistance to acetyl-CoA carboxylase herbicides is documented in at least 43 grass weeds and is particularly problematic in Lolium, Alopecurus and Avena species. Genetic studies have shown that resistance generally evolves independently and can be conferred by target-site mutations at ACCase codon positions 1781, 1999, 2027, 2041, 2078, 2088 and 2096. The level of resistance depends on the herbicides, recommended field rates, weed species, plant growth stages, specific amino acid changes and the number of gene copies and mutant ACCase alleles. Non-target-site resistance, or in essence metabolic resistance, is prevalent, multigenic and favoured under low-dose selection. Metabolic resistance can be specific but also broad, affecting other modes of action. Some target-site and metabolic-resistant biotypes are characterised by a fitness penalty. However, the significance for resistance regression in the absence of ACCase herbicides is yet to be determined over a practical timeframe. More recently, a fitness benefit has been reported in some populations containing the I1781L mutation in terms of vegetative and reproductive outputs and delayed germination. Several DNA-based methods have been developed to detect known ACCase resistance mutations, unlike metabolic resistance, as the genes remain elusive to date. Therefore, confirmation of resistance is still carried out via whole-plant herbicide bioassays. A growing number of monocotyledonous crops have been engineered to resist ACCase herbicides, thus increasing the options for grass weed control. While the science of ACCase herbicide resistance has progressed significantly over the past 10 years, several avenues provided in the present review remain to be explored for a better understanding of resistance to this important mode of action.
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Affiliation(s)
- Shiv S Kaundun
- Syngenta, Jealott's Hill International Research Centre, Biological Sciences, Bracknell, Berkshire, UK
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Li L, Du L, Liu W, Yuan G, Wang J. Target-site mechanism of ACCase-inhibitors resistance in American sloughgrass (Beckmannia syzigachne Steud.) from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2014; 110:57-62. [PMID: 24759052 DOI: 10.1016/j.pestbp.2014.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 01/13/2014] [Accepted: 03/05/2014] [Indexed: 05/13/2023]
Abstract
American sloughgrass (Beckmannia syzigachne) is a troublesome weed in winter wheat field rotated with rice in China. Fenoxaprop-p-ethyl and pinoxaden were observed failing to control American sloughgrass in the same filed in Lujiang county in 2011 and 2012, respectively. Whole-plant bioassay was conducted to determine the resistance to fenoxaprop-p-ethyl, pinoxaden and other herbicides in American sloughgrass. Dose-response experiment indicated that Lujiang population was highly resistant to fenoxaprop-p-ethyl (199.8-fold), pinoxaden (76.2-fold), clodinafop-propargyl (334.1-fold) and sethoxydim (15.9-fold); moderately resistant to clethodim (6.3-fold), susceptible to mesosulfuron-methyl, flucarbazone-sodium, pyroxsulam and isoproturon. Partial gene of CT domain was cloned and sequenced to confirm the molecular mechanism of resistance to ACCase-inhibiting herbicides. A Trp2027Cys mutation was found in Lujiang population according to the sequencing result. This mutation is the molecular mechanism of resistance to fenoxaprop-p-ethyl in Lujiang population. Furthermore the Trp2027Cys mutation very likely results in cross resistance to clodinafop-propargyl and pinoxaden in Lujiang population. 103 mutant homozygotes were detected from the 108 plants tested using a rapid dCAPS method developed in this paper. This is the first report of pinoxaden resistance and a mutation at position of 2027 for American sloughgrass.
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Affiliation(s)
- Lingxu Li
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China; College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao 266109, Shandong, PR China
| | - Long Du
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Guohui Yuan
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China.
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Xu J, Lv B, Wang Q, Li J, Dong L. A resistance mechanism dependent upon the inhibition of ethylene biosynthesis. PEST MANAGEMENT SCIENCE 2013; 69:1407-1414. [PMID: 23457050 DOI: 10.1002/ps.3524] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 02/16/2013] [Accepted: 03/01/2013] [Indexed: 06/01/2023]
Abstract
BACKGROUND The highly selective auxin-type herbicide quinclorac is widely used to control important dicotyledon and monocotyledon weeds in rice fields. Echinochloa crusgalli var. zelayensis is one of the most troublesome weeds in China, and is very difficult to control in east China due to misuse of herbicides. RESULTS The JZD -R, JTJ -R, JCW -R and SSX -R biotypes of E. crusgalli var. zelayensis had resistance to quinclorac with resistance levels ranked as JZD -R < JTJ -R < JCW -R < SSX -R. Growth reduction in different biotypes was positively correlated with ethylene production. Stimulated levels of ethylene and 1-aminocyclopropane-1-carboxylic acid (ACC) and activities of ACC synthase and ACC oxidase in resistant biotypes were less than the susceptible biotype, and were negatively correlated with quinclorac resistance levels, suggesting that inhibition of ethylene biosynthesis was positively correlated with resistance levels. CONCLUSION Considering the resistance-dependent inhibition in the ethylene biosynthetic pathway, the mechanisms of resistance to quinclorac in E. crusgalli var. zelayensis involved alteration(s) in the ethylene response pathway, consisting of at least alteration in induction of the enzymes activity of ACC synthase and ACC oxidase.
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Affiliation(s)
- Jiangyan Xu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing 210095, China
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Xu H, Zhu X, Wang H, Li J, Dong L. Mechanism of resistance to fenoxaprop in Japanese foxtail (Alopecurus japonicus) from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2013; 107:25-31. [PMID: 25149231 DOI: 10.1016/j.pestbp.2013.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 04/16/2013] [Accepted: 04/20/2013] [Indexed: 06/03/2023]
Abstract
Japanese foxtail is one of the most common and troublesome weeds infesting cereal and oilseed rape fields in China. Repeated use during the last three decades of the ACCase-inhibiting herbicide fenoxaprop-P-ethyl to control this weed has resulted in the occurrence of resistance. Dose-response tests established that a population (AHFD-1) from eastern China had evolved high-level resistance to fenoxaprop-P-ethyl. Based on the resistance index, this resistant population of A. japonicus is 60.31-fold resistant to fenoxaprop-P-ethyl. Subsequently, only a tryptophan to cysteine substitution was identified to confer resistance to fenoxaprop-P-ethyl in this resistant population. ACCase activity tests further confirmed this substitution was linked to resistance. This is the first report of the occurrence of Trp-2027-Cys substitution of ACCase in A. japonicus. From whole-plant pot dose-response tests, we confirmed that this population conferred resistance to other APP herbicides, including clodinafop-propargyl, fluazifop-P-butyl, quizalofop-P-ethyl, haloxyfop-R-methyl, cyhalofop-butyl, metamifop, DEN herbicide pinoxaden, but not to CHD herbicides clethodim, sethoxydim. There was also no resistance observed to ALS-inhibiting herbicides sulfosulfuron, mesosulfuron-methyl, flucarbazone-sodium, pyroxsulam, Triazine herbicide prometryne and glyphosate. However, this resistant population was likely to confer slightly (or no) resistant to Urea herbicides chlortoluron and isoproturon.
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Affiliation(s)
- Hongle Xu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Xudong Zhu
- College of Science, Nanjing Agricultural University, Jiangsu Key Laboratory of Pesticide Science, Nanjing 210095, China
| | - Hongchun Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Jun Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China.
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