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Dynamics of 2,4-D and Dicamba Applied to Corn Straw and Their Residual Action in Weeds

dc.contributor.authorGazola, Tiago [UNESP]
dc.contributor.authorCosta, Renato Nunes [UNESP]
dc.contributor.authorCarbonari, Caio Antonio [UNESP]
dc.contributor.authorVelini, Edivaldo Domingues [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T15:12:37Z
dc.date.available2023-07-29T15:12:37Z
dc.date.issued2022-10-01
dc.description.abstract2,4-D and dicamba are used in the postemergence management of eudicotyledonous weeds in different crops, most of which are grown under no-tillage systems. Due to the application methods for these products, their dynamics in straw and their residual action in soil have rarely been explored. Thus, the objective of this study was to evaluate the dynamics of 2,4-D and dicamba that have been applied to corn straw and to verify their relationship with residual control action in weeds. In the dynamics experiments, the herbicides were applied to 5 t ha−1 of straw, and rainfall simulations were performed with variable amounts and at different periods after application to evaluate herbicide movement in the straw. In the residual action experiments, the species Digitaria insularis, Conyza spp., Bidens pilosa, Amaranthus hybridus, Euphorbia heterophylla, and Eleusine indica were sown in trays, and 2,4-D and dicamba were applied directly to the soil, to the soil with the subsequent addition of the straw, and to the straw; all of these applications were followed by a simulation of 10 mm of rain. The physical effect of the straw and the efficacy of the herbicides in terms of pre-emergence control of the weed species were evaluated. The leaching of 2,4-D and dicamba from the corn straw increased with a higher volume of rainfall, and the longer the drought period was, the lower the final amount of herbicide that leached. The presence of the corn straw on the soil exerted a physical control effect on Conyza spp.; significantly reduced the infestation of D. insularis, B. pilosa, A. hybridus, and E. indica; and broadened the control spectrum of 2,4-D and dicamba, assisting in its residual action and ensuring high levels of control of the evaluated weeds. In the absence of the straw, 2,4-D effectively controlled the pre-emergence of D. insularis, Conyza spp., and A. hybridus, and dicamba effectively controlled D. insularis, Conyza spp., B. pilosa, A. hybridus, E. heterophylla, and E. indica.en
dc.description.affiliationDepartment of Plant Protection College of Agricultural Sciences São Paulo State University (Universidade Estadual Paulista “Júlio de Mesquita Filho” UNESP), SP
dc.description.affiliationUnespDepartment of Plant Protection College of Agricultural Sciences São Paulo State University (Universidade Estadual Paulista “Júlio de Mesquita Filho” UNESP), SP
dc.identifierhttp://dx.doi.org/10.3390/plants11202800
dc.identifier.citationPlants, v. 11, n. 20, 2022.
dc.identifier.doi10.3390/plants11202800
dc.identifier.issn2223-7747
dc.identifier.scopus2-s2.0-85140784483
dc.identifier.urihttp://hdl.handle.net/11449/249309
dc.language.isoeng
dc.relation.ispartofPlants
dc.sourceScopus
dc.subjectauxinic herbicides
dc.subjectcholine salt
dc.subjectdiglycolamine salt
dc.subjectefficacy
dc.subjecteudicotyledonous
dc.subjectleaching
dc.subjectmonocotyledonous
dc.titleDynamics of 2,4-D and Dicamba Applied to Corn Straw and Their Residual Action in Weedsen
dc.typeArtigo
dspace.entity.typePublication
unesp.author.orcid0000-0002-0383-2529[3]
unesp.departmentProdução e Melhoramento Vegetal - FCApt

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