Glufosinate Combinations and Row Spacing for Weed Control in Glufosinate-Resistant Corn (<i>Zea mays</i>)<sup>1</sup>

Jones, Curtis A.; Chandler, James M.; Morrison, John E.; Senseman, Scott A.; Tingle, Christopher H.

doi:10.1614/0890-037x(2001)015[0141:gcarsf]2.0.co;2

Cited by 30 publications

(26 citation statements)

References 23 publications

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“…Jones et al (2001) chegaram à conclusão de que a aplicação da atrazine em milho resistente a glufosinate durante a semeadura da cultura, complementada pelo amônio-glufosinato para o controle das plantas escapes, resultou em melhor controle das plantas daninhas do que a aplicação de glufosinate em pós-emergência sem atrazine na semeadura. A aplicação do herbicida pré-emergente, complementado posteriormente com a aplicação de glyphosate em pós-emergência resulta em maior produtividade e menor presença de plantas daninhas, quando se compara com apenas a aplicação de glyphosate na pós-emergência (Ben et al, 2012;Toledo et al, 2015).…”

Section: Resultsunclassified

Alternativas de controle químico do capim-amargoso resistente ao glyphosate, com herbicidas registrados para as culturas de milho e algodão

Melo¹,

Rocha²,

Brunharo³

et al. 2017

RBHerbicidas

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Resumo -Nos sistemas de produção agrícolas no Brasil é comum a rotação de culturas soja, milho e/ou algodão, todas resistentes ao herbicida glyphosate; o que favorece a seleção de populações de capim-amargoso (Digitaria insularis) resistente ao glyphosate. Para as culturas de milho e algodão, pouco se sabe sobre alternativas para manejo químico para D. insularis. Dessa forma, torna-se pertinente a investigação da eficácia de herbicidas de mecanismos de ação alternativos ao glyphosate, aplicados em condições de pré e pós-emergência, para o controle do biótipo resistente de capim-amargoso (D. insularis), recomendados para as culturas do milho e algodão. O experimento foi desenvolvido em casa-de-vegetação, durante os meses de setembro a dezembro de 2014, utilizando um biótipo de D. insularis resistente ao glyphosate. O delineamento estatístico utilizado foi de blocos ao acaso com quatro repetições. A aplicação aconteceu quando as plantas de capim-amargoso estavam no estádio de 1 a 2 perfilhos e em pré-emergência com diferentes herbicidas. Os tratamentos que obtiveram melhores resultados em condições de pós-emergência da planta daninha foram os herbicidas nicosulfuron, imazapic + imazapyr, atrazine, haloxifop-methyl e tepraloxydim. Os herbicidas atrazine, isoxaflutole, S-metolachlor, clomazone, diuron e flumioxazin se apresentaram como pré-emergentes eficazes para o controle desta espécie. Palavras-chave: resistência, associações, graminicidas, pré-emergência, pós-emergência Abstract -In Brazil cropping systems is common a rotation between soybean, corn and / or cotton, all resistant to glyphosate, which favor the selection of glyphosate resistant sourgrass populations (Digitaria insularis). Little is known about alternative chemical control of D. insularis registered for the corn and cotton crops. Thus, it is relevant to investigate herbicides with alternative mode of action, applied in pre and post-emergence conditions, to be used for efficient control of the glyphosate resistant sourgrass biotype (D. insularis). The experiment was conducted in greenhouse, from

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Section: Resultsunclassified

Alternativas de controle químico do capim-amargoso resistente ao glyphosate, com herbicidas registrados para as culturas de milho e algodão

Melo¹,

Rocha²,

Brunharo³

et al. 2017

RBHerbicidas

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“…Good control of Palmer amaranth in corn can be achieved when mixtures of two herbicides effective on the weed are applied POST. Jones et al (1998) found that a mixture of glufosinate with atrazine enhanced Palmer amaranth control over glufosinate alone. Bararpour et al (2011) reported that two HPPD-inhibiting herbicides can provide good control of Palmer when mixed with atrazine.…”

Section: Management Of Palmer Amaranthmentioning

confidence: 99%

Mechanism of extreme genetic recombination in weedy Amaranthus hybrids

Steinau

Skinner²,

Steinau

2003

Weed Science

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Interspecific hybridization of Palmer amaranth and common waterhemp produce hybrids with unique DNA fragments not found in either parent. The objective of this research was to investigate the mechanisms involved in the formation of the polymorphic fragments. Six novel fragments were cloned and sequenced. Five of the six were significantly similar to plant transposons, the sixth was similar to squamosa promoter–binding proteins from other plant species. Southern blot analysis using one of the novel fragments as probe revealed a consistent pattern of repetitive DNA that was species and biotype specific. These results indicate that transposon-like elements may play an important role in the formation of new fragments in Amaranthus hybrids derived from interspecific hybridization, suggesting that considerable instability of the hybrid genome may occur.

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“…), browntop panicum (P. fasciculatum Sw.), and toothed spurge (Euphorbia dentata Michx.) was reported with glufosinate at 300 g ha Ϫ1 (Jones et al 2001). Good efficacy of the herbicide on some of the more troublesome broadleaf and grass weeds make a glufosinate-based herbicide program a potentially effective and popular tool for weed management in Louisiana cotton.…”

mentioning

confidence: 99%

Response of non–glufosinate-resistant cotton to reduced rates of glufosinate

et al. 2003

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Field research was conducted for 2 yr to determine the effect of reduced rates of glufosinate on growth and yield of non–glufosinate-resistant cotton. Rates of 3.4, 6.7, 13, 26.5, 52.5, and 105 g ha−1, representing 0.008, 0.016, 0.031, 0.063, 0.125, and 0.25 of an effective use rate (420 g ha−1), were applied to cotton at the two-, five-, or nine-node growth stage. Based on analysis of visual injury, cotton response decreased as application timing was delayed in one of the three experiments. Injury response was increased slightly with application at the five- compared with the two-node growth stage and was not significant for the latest application timing (nine-node stage) in two of three experiments. In two of the three experiments, plant height reduction response was lowest at the five-node stage and greatest at the nine-node stage. Regardless of application timing, plant dry weight was negatively affected only with the highest rate of glufosinate. Glufosinate application, based on node above white flower number and percent open boll, did not result in a delay in maturity. Final plant population was reduced in all experiments at the two-node application and in one of the three experiments at the five-node stage. Glufosinate application did not adversely affect final plant population when applied to nine-node cotton. Negative effects on cotton growth were not manifested in seedcotton yield reduction after glufosinate application.

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Glufosinate Combinations and Row Spacing for Weed Control in Glufosinate-Resistant Corn (Zea mays)¹

Cited by 30 publications

References 23 publications

Alternativas de controle químico do capim-amargoso resistente ao glyphosate, com herbicidas registrados para as culturas de milho e algodão

Alternativas de controle químico do capim-amargoso resistente ao glyphosate, com herbicidas registrados para as culturas de milho e algodão

Mechanism of extreme genetic recombination in weedy Amaranthus hybrids

Response of non–glufosinate-resistant cotton to reduced rates of glufosinate

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Glufosinate Combinations and Row Spacing for Weed Control in Glufosinate-Resistant Corn (Zea mays)1

Cited by 30 publications

References 23 publications

Alternativas de controle químico do capim-amargoso resistente ao glyphosate, com herbicidas registrados para as culturas de milho e algodão

Alternativas de controle químico do capim-amargoso resistente ao glyphosate, com herbicidas registrados para as culturas de milho e algodão

Mechanism of extreme genetic recombination in weedy Amaranthus hybrids

Response of non–glufosinate-resistant cotton to reduced rates of glufosinate

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Glufosinate Combinations and Row Spacing for Weed Control in Glufosinate-Resistant Corn (Zea mays)¹