HTolerance of Pima and Upland cotton to trifloxysulfuron (Envoke) herbicide under field conditions
作者机构：Department of Plant and Environmental SciencesNew Mexico State Univer-sityLas CrucesNM 88003USA Cotton IncorporatedCaryNCUSA
出 版 物：《Journal of Cotton Research》 (棉花研究（英文）)
年 卷 期：2021年第4卷第4期
页 面：299-307页
学科分类：090403[农学-农药学(可授农学、理学学位）] 09[农学] 0904[农学-植物保护] 0901[农学-作物学]
基 金：supported in part by Cotton Incorporated and New Mexico Agricultural Experiment Station
主 题：Upland cotton Pima cotton Glandless Trifloxysulfuron(Envoke) Herbicide tolerance
摘 要：Trifloxysulfuron(Envoke)is an acetolactate synthase-inhibitor herbicide and can be used to control many broadleaf weeds and nutsedges in cotton ***,there is a lack of information on genotypic variation in response to the *** this field study,60 Pima(Gossypium barbadense L.)lines,122 Upland(*** L.)lines,and 9 Upland×Pima segregating populations were divided into five tests(18A,18B,18G,18RB,and 18HQ)to evaluate tri-floxysulfuron tolerance at the 7-true leaf stage(42 days after planting)under the same field conditions in *** the five tests,Pima cotton genotypes tested in this study did not show any visual crop injury based on percentage of plants with chlorosis at 6 days after treatment(DAT),indicating consistent and high levels of trifloxysulfuron ***,the response to trifloxysulfuron within Upland cotton is highly *** Upland cotton is overall more sensitive to trifloxysulfuron with crop injury up to 80%than Pima cotton,19 lines had injury below 5%including one line with no visual injury,and 19 lines had injury between 5%and 10%.In test 18HQ with 15 transgenic Upland cultivars and 17 non-transgenic Upland lines,the analysis of variance detected a significant genotypic *** broad-sense heritability estimates for trifloxysulfuron tolerance based on crop injury at 6 DAT was 0.555,suggesting that trifloxysulfuron tolerance in Upland cotton is moderately *** study represents the first report that Pima cotton and many Upland cotton lines are highly tolerant to trifloxysulfuron with no or little crop injury.
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