Selectivity of nicosulfuron and atrazine on different corn hybrids

Barroso, Alberto Leão de Lemos; Dan, Hugo Almeida; Dan, Lilian Gomes de Moraes; Ferreira Filho, Wander Cruvinel; Menezes, Carlos César Evangelista; Melo Filho, Luiz Cobiniano

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dc.creator	Barroso, Alberto Leão de Lemos
dc.creator	Dan, Hugo Almeida
dc.creator	Dan, Lilian Gomes de Moraes
dc.creator	Ferreira Filho, Wander Cruvinel
dc.creator	Menezes, Carlos César Evangelista
dc.creator	Melo Filho, Luiz Cobiniano
dc.date	2012-12-19
dc.date.accessioned	2022-03-21T20:07:13Z
dc.date.available	2022-03-21T20:07:13Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/220
dc.identifier	10.14295/cs.v3i4.220
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/77577
dc.description	Nicosulfuron and atrazine are herbicides widely used for weed control on corn crops. However, itsselectivity is often fairly questionable due to genotypic variability of hybrids in the market. In thiscontext, this study aims to assess both nicosulfuron selectivity and atrazine mixture in 34 corn hybrids.Treatment was arranged in a completely randomized block design, in a split-plot scheme (34x5)with four replicates, in which corn hybrids constituted the plots and herbicides the subplots. 34 cornhybrids were submitted to four herbicide treatments: nicosulfuron (rates of 50 and 60 g ha-1) andnicosulfuron + atrazine (20 + 1500 and 40 + 3000 g ha-1) as well as a non treated check for each hybrid.Application was performed at 19 days (V4/V5) after corn emergence. Phytointoxication symptomswere assessed at 7; 14 and 21 days after treatment application. One thousand grain weight andhybrid yield were also determined. Based on the results, it was observed that the phytotoxic effectsof nicosulfuron+atrazine (40+3000 g ha-1) were enough to reduce the weight of 1000 seeds in hybridsBMX61, BMX750, and NB7405. Nevertheless, herbicide treatments, either alone or associated withatrazine, were selective to the 34 genotypes studied.	en-US
dc.description	Nicosulfuron and atrazine are herbicides widely used for weed control on corn crops. However, itsselectivity is often fairly questionable due to genotypic variability of hybrids in the market. In thiscontext, this study aims to assess both nicosulfuron selectivity and atrazine mixture in 34 corn hybrids.Treatment was arranged in a completely randomized block design, in a split-plot scheme (34x5)with four replicates, in which corn hybrids constituted the plots and herbicides the subplots. 34 cornhybrids were submitted to four herbicide treatments: nicosulfuron (rates of 50 and 60 g ha-1) andnicosulfuron + atrazine (20 + 1500 and 40 + 3000 g ha-1) as well as a non treated check for each hybrid.Application was performed at 19 days (V4/V5) after corn emergence. Phytointoxication symptomswere assessed at 7; 14 and 21 days after treatment application. One thousand grain weight andhybrid yield were also determined. Based on the results, it was observed that the phytotoxic effectsof nicosulfuron+atrazine (40+3000 g ha-1) were enough to reduce the weight of 1000 seeds in hybridsBMX61, BMX750, and NB7405. Nevertheless, herbicide treatments, either alone or associated withatrazine, were selective to the 34 genotypes studied. Seletividade de nicosulfuron e atrazine em diferenteshíbridos de milhoNicosulfuron e atrazine são herbicidas de dupla aptidão mais utilizados no manejo de plantasdaninhas na cultura do milho. No entanto, sua seletividade é bastante questionada em função davariabilidade genotípica dos híbridos presentes no mercado. Neste contexto, objetivou-se com estetrabalho avaliar a seletividade do herbicida nicosulfuron e da mistura com atrazine em 34 híbridos demilho. O ensaio foi implantado em delineamento de blocos casualizados em esquema de parcelassubdivididas 34 x 5, com quatros repetições, adotando-se os híbridos na parcela e herbicidas nasubparcelas. Os 34 híbridos de milho foram submetidos a quatro tratamentos herbicidas, sendoeles: nicosulfuron nas doses de 50 e 60 g ha-1 e nicosulfuron + atrazine nas doses 20 + 1500 e 40 +3000 g ha-1, além de uma testemunha sem herbicida para cada híbrido. A aplicação foi realizada19 dias (V4/V5) após a emergência do milho. Foram avaliados os sintomas de fitointoxicação aos7, 14 e 21 dias após a aplicação dos tratamentos. Determinou-se, ainda, a massa de mil grãose a produtividade dos híbridos. Com base nos resultados, constatou-se que os efeitos fitotóxicosda mistura nicosulfuron+atrazine (40+3000 g ha-1) foi suficiente para reduzir a massa de mil grãosnos híbridos BMX61, BMX750 e NB7405. Entretanto, os tratamentos herbicidas, sejam eles na formaisolada ou associada ao atrazine foram seletivos aos 34 genótipos estudados.	pt-BR
dc.format	application/pdf
dc.language	por
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/220/147
dc.source	Comunicata Scientiae; Vol. 3 No. 4 (2012); 255-262	en-US
dc.source	Comunicata Scientiae; v. 3 n. 4 (2012); 255-262	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.subject	Atrazine	en-US
dc.subject	post-emergence	en-US
dc.subject	ALS inhibitors	en-US
dc.subject	Zea mays	en-US
dc.subject	Atrazine	pt-BR
dc.subject	post-emergence	pt-BR
dc.subject	ALS inhibitors	pt-BR
dc.subject	Zea mays	pt-BR
dc.title	Selectivity of nicosulfuron and atrazine on different corn hybrids	en-US
dc.title	Selectivity of nicosulfuron and atrazine on different corn hybrids	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion