Tolerância do milheto (Pennisetum americanum) ao 2, 4-D

Pacheco, Leandro Pereira; Petter, Fabiano André; Camara, Abib; Lima, Dayene Bueno Cruvinel; Procópio, S.O.; Barroso, Alberto Leão de Lemos; Filho, Alberto Cargnelutti; Silva, I.S.

doi:10.1590/s0100-83582007000100019

Cited by 15 publications

(17 citation statements)

References 12 publications

(12 reference statements)

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“…Apesar de ser uma espécie que vem ganhando destaque na região dos cerrados, não existe no mercado brasileiro nenhum herbicida registrado para uso na cultura do milheto (Pereira Filho et al, 2003). Controle flexível e eficiente de espécies latifoliadas tem sido obtido com atrazine (Ndahi et al, 1980), 2,4-D (Farinelli et al, 2005Pacheco et al, 2007) e carfentrazone-ethyl (Lyon et al, 2007); contudo, opções para o controle de gramíneas na cultura do milheto ainda não foram identificadas.…”

Section: Introductionunclassified

Seletividade do herbicida tembotrione à cultura do milheto

Dan

Barroso²,

Dan

et al. 2010

Planta daninha

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RESUMO -O presente trabalho teve por objetivo avaliar a seletividade do herbicida tembotrione aplicado em pós-emergência na cultura do milheto. Foram realizados dois ensaios, avaliandose primeiramente o efeito do herbicida sobre três cultivares de milheto (ADR-300, ADR-500 e ADR-7010) em casa de vegetação. Posteriormente, o híbrido ADR-7010 foi submetido, no campo, a doses crescentes de tembotrione aplicadas em dois estádios de desenvolvimento das plantas (quatro e sete folhas completamente desenvolvidas). Em casa de vegetação, os cultivares apresentaram percentuais semelhantes de redução no acúmulo de matéria seca da parte aérea, após utilização de 75,5 g ha -1 no estádio de quatro folhas expandidas. Em campo, o tembotrione mostrou maior potencial de intoxicação ao ser aplicado nos estádios mais precoces do híbrido ADR-7010. A seletividade do tembotrione é alterada em função da dose e do estádio fenológico da cultura do milheto no momento da aplicação do herbicida. O uso de tembotrione na cultura do milheto em áreas destinadas à produção de grãos mostrase uma alternativa viável no controle de plantas daninhas.Palavras-chave: plantas daninhas, Pennisetum glaucum, tricetonas.ABSTRACT -The present study was carried out to evaluate the selectivity of the herbicide tembotrione, applied at post-emergence of pearl millet. Two experiments were conducted, evaluating primarily the effect of the herbicide on three pearl millet cultivars (ADR-300, ADR-500 and ADR-7010) under greenhouse conditions. The hybrid ADR-7010 was later tested under field conditions, when increasing doses of tembotrione were applied at two stages of plant development (four and seven fully developed leaves). Under greenhouse conditions, the cultivars presented similar percentages of reduction of shoot dry matter accumulation, after tembotrione application at 75.5 g ha -1 at the four-expanded leaf stage .Under field conditions, tembotrione showed the highest phytotoxicity when applied at the early stages of hybrid ADR-7010. Tembotrione selectivity is dependent on the dose and developmental stage of pearl millet at the time of herbicide application. The use of tembotrione over growing millet in areas intended for grain production was found to be a viable alternative to weed control.

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Section: Introductionunclassified

Seletividade do herbicida tembotrione à cultura do milheto

Dan

Barroso²,

Dan

et al. 2010

Planta daninha

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“…The selectivity of atrazine to corn plants is due to herbicide degradation (Vidal 2001), so that the used dose was probably high to plant support the effect of the herbicide, in spite of being a recommended dose. In addition, 2,4-D can cause negative impact on corn plants (Pacheco et al 2007, Dan et al 2010, depending on the used dose, in spite of 1A 1B…”

Section: Discussionmentioning

confidence: 99%

Can herbicides increase the content of crude protein in corn silage?

Lopes¹,

Manetti²,

Carvalho³

2017

Commun. Plant Sci.

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“…Similarly, dicamba applied at 280 g ae ha −1 had little or no effect on crop height, only a slight increase by 6% compared to the control being noted at Rocky Mount in 2012 and Kinston in 2014 when dicamba was applied on 45 or 55 cm tall sorghum. Other studies have reported nonsignificant decrease in plant height with 2,4-D applied at 335, 670, or 1005 g ae ha −1 and on three-to six-leaf stage grain sorghum [12] whereas significant reduction occurred at the same 2,4-D rates on three-leaf stage pearl millet [Pennisetum americanum (L.) Leeke] [24]. These contrasting results may be due to differential sensitivity to 2,4-D, which is associated with genetic variations of the different sorghum cultivars.…”

Section: Crop Height At Bootmentioning

confidence: 99%

Rate and Timing Effects of Growth Regulating Herbicides Applications on Grain Sorghum (Sorghum bicolor) Growth and Yield

Besançon

Riar

Heiniger

et al. 2016

Advances in Agriculture

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Dicamba and 2,4-D are among the most common and inexpensive herbicides used to control broadleaf weeds. However, different studies have pointed the risk of crop injury and grain sorghum yield reduction with postemergence applications of 2,4-D. No research data on grain sorghum response to 2,4-D or dicamba exists in the Southeastern United States. Consequently, a study was conducted to investigate crop growth and yield response to 2,4-D (100, 220, and 330 g acid equivalent ha −1 ) and dicamba (280 g acid equivalent ha−1 ) applied on 20 to 65 cm tall sorghum. Greater stunting resulted from 2,4-D applied at 330 g acid equivalent ha −1 or below 45 cm tall sorghum whereas lodging prevailed with 2,4-D at 330 g acid equivalent ha −1 and dicamba applied beyond 35 cm tall crop. Regardless of local environmental conditions, 2,4-D applied up to 35 cm tall did not negatively impact grain yield. There was a trend for yields to be somewhat lower when 2,4-D was applied on 45 or 55 cm tall sorghum whereas application on 65 cm tall sorghum systematically decreased yields. More caution should be taken with dicamba since yield reduction has been reported as early as applications made on 35 cm tall sorghum for a potentially dicamba sensitive cultivar.

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Tolerância do milheto (Pennisetum americanum) ao 2, 4-D

Cited by 15 publications

References 12 publications

Seletividade do herbicida tembotrione à cultura do milheto

Seletividade do herbicida tembotrione à cultura do milheto

Can herbicides increase the content of crude protein in corn silage?

Rate and Timing Effects of Growth Regulating Herbicides Applications on Grain Sorghum (Sorghum bicolor) Growth and Yield

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