Seletividade e eficácia de herbicidas inibidores da enzima accase na cultura da mamona

Maciel, Cleber Daniel de Góes; Silva, T. R. B.; Poletine, Juliana Parisotto; Velini, Edivaldo Domingues; Zanotto, Maurício Dutra; Martins, Fabiano Machado; Gava, Fernando Henrique

doi:10.1590/s0100-83582011000300015

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…* significant by F test (p≤0.05); ns = non significant. Maciel et al (2011) observed lower chlorophyll content in leaves from the AL Guarany 2002 cultivar, according to the application of isoxaflutole in post-emergence, supporting the intoxication observed between day 7 and 28 DAA. Therefore, results obtained with this carotenoid synthesis inhibitor herbicide and with chlorimuron-ethyl, which inhibits the ALS enzyme, show that the chlorophyll content may be used as an intoxication indicator in studies about herbicide selectivity in the culture of castorbean.…”

Section: (B)supporting

confidence: 60%

“…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%

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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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Section: (B)supporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Selectivity of Chlorimuron-Ethyl to Castorbean Crops

et al. 2017

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“…Para o controle de plantas daninhas gramíneas em pós-emergência os herbicidas que apresentaram maior seletividade foram os inibidores da ACCase fluazifop, sethoxydim, haloxifop, clethodim, quizalofop, propaquizafop, fenoxaprop e butroxydim (Maciel et al, 2011). Para o controle de plantas daninhas dicotiledôneas poucos trabalhos são relatados sendo os herbicidas testados pouco seletivos à cultura da mamoneira (Ferreira et al, 2009).…”

Section: Introductionunclassified

Tolerância de mamoneira ao herbicida pendimethalin em solos com diferentes capacidades de adsorção

Silva

Sofiatti

et al. 2012

Rev. bras. eng. agríc. ambient.

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R ESU M OA mamoneira é uma espécie de crescimento inicial lento. A ausência de herbicidas registrados para esta cultura, ainda é fator limitante para sua expansão; assim, objetivou-se, com este trabalho, avaliar a tolerância da mamoneira ao herbicida pendimethalin em solos com diferentes capacidades de adsorção. O experimento foi conduzido em casa de vegetação, em delineamento inteiramente casualizado com cinco repetições e consistiu em uma combinação fatorial de oito doses do herbicida pendimethalin aplicado em pré-emergência (0; 187,5; 375; 750; 1.500; 3.000; 6.000 e 12.000 g ha -¹ i.a.) e quatro tipos de substrato, sendo três solos de textura: franco-argilo-arenosa, franco-argilosa e franco-arenosa, além do substrato arenoso. Aos 22 dias após a semeadura determinaram-se as variáveis altura de plantas, área foliar, massa fresca e seca da parte aérea, volume e massa seca do sistema radicular. Concluiu-se que a dose do herbicida pendimethalin tolerado pela mamoneira é influenciada pela capacidade de adsorção do solo. O herbicida mostrou-se seletivo à cultura não ocasionando redução do crescimento nas doses utilizadas para controle de plantas daninhas. Palavras-chave: Ricinus communis L., competição, controle químicoTolerance of castor bean to pendimethalin herbicide in soils with different adsorption capacities A B ST R A C TThe castor bean is a species of slow initial growth. The absence of registered herbicides for this crop is still a limiting factor for its expansion. The aim of this study was to evaluate the castor bean tolerance to the herbicide pendimethalin in soils with different adsorption capacities. The experiment was conducted under greenhouse conditions in a completely randomized design with five replications and consisted of a factorial combination of eight doses of the herbicide pendimethalin applied as pre-emergence (0; 187,5; 375; 750; 1500; 3000; 6000 and 12000 g ha -¹ i.a.), and four types of substrate (clay loam, sandy clay loam, sandy loam and sandy soil). At 22 days after sowing the variables: plant height, leaf area, fresh and dry mass of shoots, root system volume and dry weight were determined. It was concluded that the dose of the herbicide pendimethalin tolerated by the castor bean is influenced by the adsorption capacity of the soil. The herbicide was found to be very selective to this crop, not causing significant reduction of plant growth at the doses indicated to be used for weed control.

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“…Examples of herbicide screening work for various crops are available in the literature, such as for castor beans plant (Ricinus communis) and crambe (Maciel et al, 2011;Oliveira Neto et al, 2011a). For C. spectabilis there are few reports of this type of research, and just a few studies on the control of this species carried out in the United States, where it is classified as weed (Wills & McWhorter, 1981;Maddox et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Selection of Herbicides Targeting the Use in Crop Systems Cultivated With Showy Crotalaria

et al. 2015

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-The increase in the area planted with Crotalaria spectabilis has occurred by several factors, highlighting the potential to reduce the nematodes, nitrogen fixation and the high production of biomass. By becoming a species sown as a crop, it is necessary to control the weeds that coexist with showy crotalaria. This change in the use of this crop creates the possibility of this specie becoming a weed. The aim of this study was to assess the potential use of herbicides applied in preemergence and postemergence of C. spectabilis for different purposes (control of volunteer and selectivity plants). Three experiments were installed in a greenhouse (two with herbicides applied in preemergence -in soils with distinct textural categories; and one experiment with herbicides applied in postemergence). The results of the experiments with herbicides applied in preemergence showed that: amicarbazone, atrazine, diuron, metribuzin, prometryn, fomesafen and sulfentrazone showed effectiveness for control of C. spectabilis in clayey soil. Besides these, flumioxazin and isoxaflutole also showed potential to be used in the control of showy crotalaria in soils with loam texture. In relation to the postemergence herbicides, atrazine, diuron, prometryn, flumioxazin, fomesafen, lactofen, saflufenacil, amonio-glufosinate and glyphosate can be used aiming the chemical control of C. spectabilis. Herbicides chlorimuron-ethyl, diclosulan, imazethapyr, pyrithiobac-sodium, trifloxysulfuron-sodium, clomazone, pendimethalin, S-metolachlor and trifluralin applied in preemergence, and imazethapyr, pyrithiobac-sodium, flumiclorac, bentazon and clethodim applied in postemergence caused low levels of injury to C. spectabilis plants, making necessary the development of new searches to ensure the selectivity of these products.Keywords: selectivity, control of volunteer plants, crop rotation, Crotalaria spectabilis. pós-emergência, atrazine, diuron, prometryn, flumioxazin, fomesafen, lactofen, saflufenacil, amonio- RESUMO -O acréscimo da área plantada com Crotalaria spectabilis tem ocorrido por diversos fatores, destacando-se o potencial de redução de nematoides, fixação de nitrogênio e elevada produção de biomassa. Ao se tornar espécie semeada como cultura, faz-se necessário o controle de plantas daninhas que convivem com a crotalária. Essa mudança na utilização dessa cultura cria a possibilidade de a espécie se tornar planta daninha. O objetivo deste trabalho foi de avaliar o potencial de utilização de herbicidas aplicados em pré e pós-emergência de C. spectabilis para diferentes finalidades (controle de plantas voluntárias e seletividade). Foram instalados três experimentos em casa de vegetação (dois com herbicidas aplicados em pré-emergência -em solos de classes texturais distintas; e um experimento com herbicidas de pós-emergência). Os resultados dos experimentos com herbicidas

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Seletividade e eficácia de herbicidas inibidores da enzima accase na cultura da mamona

Cited by 9 publications

References 8 publications

Selectivity of Chlorimuron-Ethyl to Castorbean Crops

Selectivity of Chlorimuron-Ethyl to Castorbean Crops

Tolerância de mamoneira ao herbicida pendimethalin em solos com diferentes capacidades de adsorção

Selection of Herbicides Targeting the Use in Crop Systems Cultivated With Showy Crotalaria

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