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dc.contributor.authorHIJANO, N.pt_BR
dc.contributor.authorMONQUERO, P. A.pt_BR
dc.contributor.authorMUNHOZ, W. S.pt_BR
dc.contributor.authorGUSMAO, M. R.pt_BR
dc.date.accessioned2014-01-07T11:11:11Zpt_BR
dc.date.available2014-01-07T11:11:11Zpt_BR
dc.date.created2014-01-07pt_BR
dc.date.issued2013pt_BR
dc.identifier.citationPlanta Daninha, Viçosa-MG, v. 31, n. 4, p. 903-918, dec. 2013.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/975075pt_BR
dc.descriptionThis study aimed to determine the selectivity of herbicides applied in pre- and post-emergence for alfalfa crops. Three separate experiments were carried out under greenhouse conditions. The first experiment was arranged in a completely randomized design with three replications in a 4 x 11 + 1 factorial scheme , with eleven herbicides (bentazon, chlorimuron-ethyl, fomesafen, fluazifop-p-butyl, saflufenacil, imazethapyr, clethodim, nicosulfuron, imazaquin, haloxyfop-methyl and MSMA), four doses of each herbicide (0.5 D, 0.75 D, 1.0 D and 1.25 D, where D = recommended dose), plus an untreated control. The products were applied to alfalfa plants at the stage of 4 to 5 leaf pairs. In the second experiment, the effect of pre-emergent herbicides on early alfalfa development was observed through a completely randomized design with five replications in a 3 x 4 x 2 factorial scheme, with three herbicides (hexazinone, atrazine + simazine, S-metolachlor), four doses (0.5 D, 0.75 D, 1.0 D and 1.25 D), and two types of soil texture (loamy and clay soil), plus an untreated control. The third experiment evaluated the action of atrazine, 2,550 g ha-1; clomazone - 600 g ha-1; diclosulam - 25 g ha-1; diuron+hexazinone - 936 + 264 g ha-1 and diuron+hexazinone +sulfometuron - 1,386 + 391 + 33.35 g ha-1 on alfalfa sown at different times after herbicide application. The effects of the treatments on alfalfa were evaluated according to visual phytotoxicity symptoms, plant height, and biomass of roots and shoots. Among the herbicides applied at post-emergence, imazethapyr, clethodim, haloxyfop-p-methyl and MSMA were selective for alfalfa, while among those applied at pre-emergence, none were selective, regardless of soil texture. The results of the third experiment showed that the herbicides diclosulam, hexazinone + diuron and atrazine caused less toxicity in alfalfa plants.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectPeríodo residualpt_BR
dc.titleHerbicide selectivity in alfalfa crops.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-03-08T11:11:11Zpt_BR
dc.subject.thesagroFitotoxicidadept_BR
dc.subject.thesagroMedicago Sativapt_BR
riaa.ainfo.id975075pt_BR
riaa.ainfo.lastupdate2016-03-08pt_BR
dc.identifier.doihttps://doi.org/10.1590/S0100-83582013000400017pt_BR
dc.contributor.institutionN. HIJANO, Universidade Federal de São Carlospt_BR
dc.contributor.institutionP. A. MONQUERO, Universidade Federal de São Carlospt_BR
dc.contributor.institutionW. S. MUNHOZ, Universidade Federal de São Carlospt_BR
dc.contributor.institutionMARCOS RAFAEL GUSMAO, CPPSE.pt_BR
Aparece en las colecciones:Artigo em periódico indexado (CPPSE)

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