Controle de diferentes espécies de guanxuma com aplicações seqüenciais de flumiclorac-pentil

Constantin, Jamil; Oliveira, Rubem Silvério de; Kajihara, Luciano Hiroyuki; Arantes, J.G.Z.; Cavalieri, S.D.; Alonso, Diego Gonçalves

doi:10.4025/actasciagron.v29i4.403

Cited by 10 publications

(11 citation statements)

References 3 publications

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“…In addition to low vegetation, soil coverage was characterized by the dominance of Sida glaziovii K. Schum, considered a ruderal species that colonizes mainly pasture areas, propagates by seeds (Constantin et al, 2007) and inhabits places of low environmental stress and high disturbance intensity. It is usually herbaceous, with a rapid development cycle, high aggressiveness and low competitive capacity (Chaves & Silva, 2012).…”

Section: Resultsmentioning

confidence: 99%

Use of topsoil for restoration of a degraded pasture área

Pereira

Amaral

Silva

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the influence of topsoil thickness, shading and origin when performing environmental restoration in a degraded pasture area. The experiment was conducted in a randomized block design with a factorial (3 x 2 x 2) + 2 layout. Treatments consisted of combinations of topsoil origins (forest at early or middle regeneration stages), topsoil thicknesses (10, 20, or 30-cm superficial soil layer), and presence or absence of 70% shading; with two additional control treatments. Surveys on topsoil physical-chemical attributes and flora and soil coverage were conducted. Good correlation was observed between bulk density and total porosity. Vegetation comprised a total of 2,932 individuals of herbaceous, shrub and subshrub plants; 33 species in 11 families and 1 morphospecies were identified. A floristic survey of the tree stratum revealed 235 individuals belonging to 21 species and 14 families, as well as 2 unidentified species. The best natural regeneration index is observed in the 20-cm topsoil layer, where shading exerts a positive influence on the humidity and natural regeneration of the seed bank. Topsoil from middle-stage forest is the most suitable for restoration of degraded pasture areas.

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Section: Resultsmentioning

confidence: 99%

Use of topsoil for restoration of a degraded pasture área

Pereira

Amaral

Silva

et al. 2017

Pesq. agropec. bras.

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“…Beyers et al (2002), evaluating the effectiveness of the herbicide flumicloracpentyl, reported that its addition to ammonium glufosinate did not significantly improve the control of S. spinosa. Constantin et al (2007) found that among several herbicides tested for control of four species of Sida (S. rhombifolia, S. spinosa, S. cordifolia and S. glaziovii), fomensafen and lactofen, even with adjuvant, showed the lowest control rates for S. spinosa. However, the same authors found that the herbicide flumiclorac-pentyl was an excellent option, successfully controlling this species.…”

Section: Resultsmentioning

confidence: 99%

“…The efficiency of herbicides applied to leaves depends on the morphology and physicochemical characteristics of the leaf surface and the presence of adjuvants in the herbicidal solution (Constantin et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Leaf area and epicuticular wax content of Sida spp

et al. 2014

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RESUMOÁrea foliar e conteúdo de cera epicuticular de Sida spp.Características morfofisiológicas e composições químicas estão diretamente relacionadas com a maior habilidade competitiva das culturas. O objetivo deste trabalho foi realizar análise comparativa da produção de matéria seca, de área foliar e de quantidade de cera epicuticular de três espécies de Sida spp.: Sida urens L., Sida rhombifolia L. e Sida spinosa L. Essas espécies foram coletadas em três estádios fenológicos, caracterizados como V1: formação de até dez folhas completamente expandidas; V2: entre 11 folhas e antes do florescimento, e R: após florescimento. Verificou-se, para os estádios V2 e R, maior número de folhas para a espécie Sida rhombifolia, seguida por S. spinosa em V2 e S. urens em R. Esses resultados foram relativamente proporcionais à área foliar para todas as espécies. S. spinosa, na fase vegetativa, produziu os maiores valores de área foliar específica (AFE), não se observando diferenças entre as espécies avaliadas no estádio caracterizado por R. Para a quantidade de cera por unidade de área foliar, entre

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“…In addition to this greater tolerance of showy crotalaria to flumiclorac in sequential applications, another benefit is related to the effectiveness of weed management, with evidence to suggest that this product shows better efficacy when applied in this manner, as demonstrated for different sida species (Sida sp. ), and Euphorbia heterophylla (OLIVEIRA JR. et al, 2006;CONSTANTIN et al, 2007). The third phytotoxicity evaluation (21 DAA) was the last in which injuries caused by the herbicides were observed in the young leaves emitted by the showy crotalaria ( Table 2).…”

Section: Resultsmentioning

confidence: 99%

Selectivity of Herbicides Applied in Post-Emergence of Showy Crotalaria

et al. 2016

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-Weed control is essential to reduce or eliminate the interference of weeds on crops. Chemical control with the application of herbicides consists of the most used method, with this aim in grain producing areas. Information about the selectivity of herbicides to C. spectabilis (showy crotalaria) are scarce, which are critical for the management of this species as a crop. One field experiment was performed to evaluate the selectivity of herbicides applied in post-emergence of showy crotalaria. The herbicides bentazon (720 and 576 g ha -1 ), imazethapyr (106 and 79.5 g ha -1 ), pyrithiobac-sodium (84 g ha ) were applied in plants with four true leaves, also using a control without herbicide application. Pyrithiobac-sodium and flumiclorac isolated and the tankmix of imazethapyr + bentazon provided greater injuries to showy crotalaria, also affecting the final plant height. Pyrithiobac-sodium (84 g ha -1 ) was not selective to showy crotalaria. The herbicides imazethapyr (79.5 g ha -1), flumiclorac (sequential application), and bentazon (576 g ha -1), despite the association between clethodim + quizalofop, can be used for weed management in showy crotalaria crop.Keywords: Crotalaria spectabilis. Cover crops. Intoxication by herbicides. Weed management. SELETIVIDADE DE HERBICIDAS APLICADOS EM PÓS-EMERGÊNCIA DA CROTALÁRIARESUMO -O manejo de plantas daninhas é prática fundamental para reduzir ou eliminar a interferência da comunidade infestante sobre a espécie cultivada. O método de controle químico, por meio da aplicação de herbicidas, consiste no mais utilizado com esta finalidade em áreas de produção de larga escala. Informações de seletividade de herbicidas para C. spectabilis (crotalária) são escassas, sendo estas de suma importância para o manejo desta espécie como cultura. Um experimento de campo foi realizado para avaliar a seletividade de herbicidas aplicados em pós-emergência na crotalária. Os herbicidas bentazon (720 e 576 g ha ) foram aplicados sob plantas com quatro folhas verdadeiras, constando também entre os tratamentos testemunha sem aplicação de herbicidas. Pyrithiobac-sodium e flumiclorac isolados e a mistura entre imazethapyr + bentazon proporcionaram maiores injúrias a crotalária, afetando também a altura final das plantas. O pyrithiobac-sodium (84 g ha -1 ) não foi seletivo para a crotalária. Os herbicidas imazethapyr (79,5 g ha -1), flumiclorac (em aplicação sequencial), bentazon (576 g ha -1), além da associação entre clethodim + quizalofop podem ser utilizados para o manejo de plantas daninhas na cultura da crotalária. Palavras-chave:Crotalaria spectabilis. Culturas de cobertura. Intoxicação por herbicidas. Manejo de plantas daninhas.

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Controle de diferentes espécies de guanxuma com aplicações seqüenciais de flumiclorac-pentil

Cited by 10 publications

References 3 publications

Use of topsoil for restoration of a degraded pasture área

Use of topsoil for restoration of a degraded pasture área

Leaf area and epicuticular wax content of Sida spp

Selectivity of Herbicides Applied in Post-Emergence of Showy Crotalaria

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