Desenvolvimento de cultivares de mamoneiras em relação à profundidade de semeadura e seletividade de herbicidas dinitroanilinas

Maciel, Cleber Daniel de Góes; Poletine, Juliana Parisotto; Velini, Edivaldo Domingues; Zanotto, Maurício Dutra; Florentino, Renan Santos; Zani, Leandro Piva; Cruz, Marcos Cirillo

doi:10.5433/1679-0359.2012v33n1p27

Cited by 6 publications

(12 citation statements)

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“…Another option to control grass species are the ACCase (Acetyl-CoA carboxylase (ACC)) inhibitor herbicides applied postemergence, such as fluazifop-p-butil, sethoxydim, haloxyfop-methyl, quizalofop-p-ethyl, clethodim, clethodim + fenoxaprop-p-ethyl, propaquizafop and butroxydim (Maciel et al, 2007(Maciel et al, , 2008(Maciel et al, , 2012Silva et al, 2012;Grichar et al, 2012;Medeiros et al, 2013). Thus, the control of eudicotyledons from the culture implementation would be more difficult for chemical control, for only chlorimuron-ethyl has proven to be selective for castor and has good control of species of this class (Maciel, 2006;Sofiatti et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

et al. 2015

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-The aim of this work was to evaluate the weed management with herbicides applied in pre and postemergence on castor crop. The treatments were constituted by management systems using herbicides in pre (PRE) and postemergence (POS): 1) S-metolachlor at 576 g ha -1 (PRE 1) and chlorimuron-methyl at 15 g ha -1 (POS 1); 2) PRE 1 + clomazone at 650 g ha -1 (PRE 2) and POS 1; 3) PRE 1, POS 1 and halosulfuron-methyl at 112.5 g ha -1 (POS 2); 4) PRE 1, POS 1 and ethoxysulfuron at 60 g ha -1 (POS 3); 5) PRE 1, POS 1 and ethoxysulfuron at 120 g ha -1 (POS 4); 6) PRE 1 + PRE 2, POS 1 and POS 2; 7) PRE 1 + PRE 2, POS 1 and POS 3; 8) PRE 1 + PRE 2, POS 1 and POS 4; 9) hand-hoeing control and 10) non-weeded control. The experimental design was randomized blocks with four replications. The association of the herbicides in PRE combined to sequence applications of chlorimuron-ethyl and halosulfuron-methyl or ethoxysulfuron in POS resulted in the highest control levels of Richardia scabra and Cyperus ferax. Mild phytointoxication symptoms to the crop were more persistent with ethoxysulfuron at 120 g ha -1 . The acceptable control of the weed species and similar yield to the hand-hoeing control permitted to conclude that S-metolachlor + clomazone PRE, followed by chlorimuron-ethyl and halosulfuron-methyl POS proved to be more adequate as a weed management strategy on castor crop. Keywords:Ricinus communis, Cyperus ferax, Richardia scabra, efficiency. RESUMO -Objetivou-se com este trabalho avaliar o manejo de plantas daninhas com herbicidas aplicados em pré e pós-emergência na cultura da mamoneira. Os tratamentos foram constituídos por sistemas de manejo utilizando-se herbicidas em pré (PRE) e pós-emergência (POS): 1) S-metolachlor a 576 g ha -1 (PRE 1) e chlorimuron-methyl a 15 g ha -1 (POS 1); 2) PRE 1 + clomazone a 650 g ha -1 (PRE 2) e POS 1; 3) PRE 1, POS 1 e halosulfuron-methyl a 112,5 g ha -1 (POS 2); 4) PRE 1, POS 1 e ethoxysulfuron a 60 g ha -1 (POS 3); 5) PRE 1, POS 1 e ethoxysulfuron a 120 g ha -1 (POS 4); 6) PRE 1 + PRE 2, POS 1 e POS 2; 7) PRE 1 + PRE 2, POS 1 e POS

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Section: Introductionmentioning

confidence: 99%

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

et al. 2015

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“…Castor bean has selectivity to the herbicide trifluralin, which is used for weed control of the Poaceae family (monocotyledons), when the herbicide is incorporated as a pre-planting application (IPP) (MACIEL et al, 2007b) Among the herbicide options studied, most are products used for pre-emergence AZEVEDO et al, 2007) that predominantly control monocotyledon species and some eudicotyledons. However, for the herbicides that have been studied, the results of selectivity studies have varied, most likely due to differences in factors, such as: dosage, application mode, soil type, and plant genotype, among others.…”

Section: Control Methodsmentioning

confidence: 99%

“…Additionally, in some cases, pendimethalin may be phytotoxic as an IPP (SEVERINO et al, 2006c) or PRE (RAMOS et al, 2006). Studies conducted under field conditions indicated that the herbicide was selective for castor bean crops when applied as an IPP (MACIEL et al, 2007b) and as a PRE (SOFIATTI et al, 2012;MACIEL et al, 2012). With regards to herbicide efficacy, Manickan et al (2009) reported that the PRE application of metolachlor or pendimethalin resulted in the satisfactory initial control of weeds and led to increases in castor bean yield.…”

Section: Control Methodsmentioning

confidence: 99%

“…Additionally, Maciel et al (2006a) using the Iris hybrid (dwarf sized), in the Middle Valley of Paranapanema, São Paulo State, observed that with a 0.5 x 1.0 m spacing CPPI occurred from 9 to 35 DAE but with a 0.5 x 0.5 m spacing CPPI was reduced to 3 to 25 DAE. More recently, Maciel et al (2007a) Generally, studies on weed interference periods show a reduction of interference periods with greater plant densities per area. While the largest spacing of plants being used for cultivation conditions occurs in the Brazilian Northeastern semi-arid production region, in the Southeast and Midwest production regions, the minimal spacing of plants is preferred.…”

Section: Weed Interference In Castor Bean Cropmentioning

confidence: 99%

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<b>Weed management strategies for castor bean crops

et al. 2014

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ABSTRACT. Castor bean crops are agriculturally relevant due to the quality and versatility of their oil, both for the chemical industry and for biodiesel production. Proper weed management is important for both the cultivation and the yield of castor bean crops; therefore, the intention of the present work is to review pertinent information regarding weed management, including the studies regarding weed interference periods, chemical controls for use in different crop production systems and herbicide selectivity, for castor bean crops. Weed science research for castor bean crops is scarce. One of the main weed management challenges for castor bean crops is the absence of herbicides registered with the Ministry of Agriculture, Livestock and Food Supply (MALFS). Research for viable herbicides for weed control in castor bean crops should be directed by research and/or rural extension institutions, associations and farmers cooperatives, as well as by manufactures, for the registration of these selective herbicides, which would be primarily used to control eudicotyledons in castor bean crops. New studies involving the integration of weed control methods in castor bean also may increase the efficiency of weed management, for both small farmers using traditional crop methods in the Brazilian Northeast region, as well as for areas with the potential for large scale production, using conservation tillage systems, such as the no-tillage crop production system. Keywords: weed competition, herbicides, selectivity, Ricinus communis. Estratégias de manejo de plantas daninhas na cultura da mamoneira RESUMO.A cultura da mamoneira apresenta destacada relevância principalmente devido à qualidade e versatilidade de seu óleo tanto na indústria química como para produção de biodiesel. Considerando a importância do manejo de plantas daninhas para o cultivo e produtividade da mamoneira, o presente trabalho teve como objetivo abordar as principais informações disponíveis sobre o assunto, entre as quais foram destacados os estudos de períodos de interferência das plantas daninhas, controle químico em diferentes sistemas de produção e seletividade de herbicidas à cultura. Verificou-se que os resultados de pesquisa sobre o manejo da cultura da mamona são escassos, nos mais variados aspectos da ciência das plantas daninhas. Uma das principais dificuldades para o controle de plantas daninhas na cultura da mamona é a atual ausência de herbicidas registrados no MAPA. As informações existentes descrevem perspectivas viáveis que necessitam ser direcionadas por instituições de pesquisa e/ou extensão rural, associações e cooperativas de produtores rurais, assim como por empresas fabricantes, para o registro de herbicidas seletivos, principalmente para o controle de espécies eudicotiledôneas. Novos estudos envolvendo a integração de métodos de controle de plantas daninhas em mamoneira também podem aumentar a eficiência no manejo, tanto para pequenas propriedades da tradicional região do Nordeste brasileiro, assim como para áreas com potencial de p...

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“…Another option to control graminaceous species in post-emergence is the use of herbicides that are ACCase inhibitors, such as fluazifopp-butyl, sethoxydim, haloxyfop-methyl, quizalofop-p-ethyl, clethodim, clethodim + fenoxaprop-pethyl, propaquizafop and butroxydim (Maciel et al, 2007(Maciel et al, , 2011(Maciel et al, , 2012Silva et al, 2012;Grichar et al, 2012;Medeiros et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Selectivity of Chlorimuron-Ethyl to Castorbean Crops

et al. 2017

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-Castorbean presents high sensitivity to competition; therefore, it is necessary to develop alternatives for the weed management, mainly for the chemical control of eudicotyledons species. The goal of this work was to evaluate the selectivity of chlorimuron-ethyl to castorbean crops in different development stages. Four experiments differentiated by the genetic material were conducted: Lyra, Íris and Savana hybrids and AL Guarany 2002 cultivar. The treatments corresponded to the application conditions of chlorimuron-ethyl [sample control with no application, doses of 15 e 20 g a.i. ha -1 with the formulations Classic ™ and Clorimuron Master Nortox ™ ] in two phenological crop stages (4 to 5 and 7 to 8 true leaf stages). The experimental design was in randomized blocks with four replications, in a factorial scheme of 5 x 2 (herbicide and application stage). The intoxication was more severe for the 7 to 8 leaf stage and with the dose of 20 g ha -1 on day 7 days after application (DAA); there were plant recovery and mild symptoms on day 21 DAA, especially for the 4 to 5 leaf stage. The yield was reduced with the 20 g ha -1 dose for Lyra hybrid with both formulations and for Savana castorbean, only with the Classic ™ formulation. The chlorimuron-ethyl herbicide, at 15 g ha -1 , showed selectivity to castorbean, regardless of the stage application (4 to 5 or 7 to 8 leaves).

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Desenvolvimento de cultivares de mamoneiras em relação à profundidade de semeadura e seletividade de herbicidas dinitroanilinas

Cited by 6 publications

References 9 publications

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

Weed Management With Herbicides Applied in Pre and Postemergence on Castor Crop

<b>Weed management strategies for castor bean crops

Selectivity of Chlorimuron-Ethyl to Castorbean Crops

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