Uso do novo sistema Clearfield® na cultura do girassol para o controle de plantas daninhas dicotiledóneas

Santos, Gizelly; Francischini, Alessandra Constantin; Constantin, Jamil; Oliveira, Rubem Silvério de; Ghiglione, Hernán; Velho, Gilberto Fernando; Neto, Antônio Mendes Oliveira

doi:10.1590/s0100-83582012000200015

Cited by 6 publications

(7 citation statements)

References 6 publications

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“…Volunteer soybean control becomes even more complex due to the lack of effective and selective herbicides to control broadleaf weeds in sunflower (Santos et al 2012). Although the most effective and widely used method is the chemical control, there are no herbicides registered for controlling volunteer soybean in sunflower crops.…”

Section: Palavras-chavementioning

confidence: 99%

Control of volunteer soybean plants in sunflower crop1

Brighenti

2015

Pesqui. Agropecu. Trop.

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Sunflower (Helianthus annuus) sown offseason, after soybean crop (Glycine max), is affected by the competition imposed by volunteer plants. Two experiments were carried out to evaluate the control of volunteer soybean plants in sunflower crops. The sulfentrazone herbicide (75 g ha-1, 100 g ha-1 and 250 g ha-1) causes phytotoxicity to sunflower immediately after application, however, plants recover, with no yield losses. These doses do not cause the total death of volunteer soybean plants, but temporarily paralyzes their growth, avoiding the competition with the sunflower crop. The glufosinate ammonium and ametryn herbicides are effective in controlling volunteer soybean plants, however, symptoms of phytotoxicity in the sunflower crop are high, reflecting in losses of dry weight biomass and crop yield. The other treatments do not provide satisfactory control of volunteer soybean plants and even reduce the sunflower dry weight biomass and yield.

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Section: Palavras-chavementioning

confidence: 99%

Control of volunteer soybean plants in sunflower crop1

Brighenti

2015

Pesqui. Agropecu. Trop.

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“…Além disso, existe o problema da permanência do grupo das imidazolinonas no sistema produtivo, pois esses herbicidas apresentam prolongada atividade residual no solo (Loux et al, 1989;Loux & Reese, 1993), que pode variar de 31 a 410 dias para imazapic (Grymes, 1995) de 60 a 360 dias para o imazethapyr (Goetz, 1990) e de até 436 dias para imazapyr (Cox, 1996). Esta persistência no solo impede o cultivo de culturas como milho, sorgo ou azevém (Pinto et al, 2009a;2009b;2009c), girassol (Santos et al, 2012) dentre outras, em sucessão ao arroz irrigado ou mesmo a semeadura, em anos posteriores a aplicação, de cultivares de arroz que não são tolerantes aos produtos.…”

Section: Introductionunclassified

Eficácia e seletividade de herbicidas do grupo das imizadolinonas aplicados em arroz irrigado

et al. 2012

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Resumo -Objetivou-se com o trabalho avaliar a eficiência no controle do arroz-vermelho e a seletividade ao arroz irrigado pela aplicação de herbicidas do grupo químico das imidazolinonas. O delineamento experimental utilizado foi o de blocos ao acaso, com quatro repetições, arranjado em esquema fatorial 4 x 4. O fator A foi composto por herbicidas e o B pelas doses dos mesmos. Os herbicidas e doses foram: imazethapyr + imazapic [(0,00; 37,50 + 12,50; 75,00 + 25,00 e 150,00 + 50,00 g ha -1 ) + Dash 0,5% v/v], imazapyr + imazapic [(0,00; 36,75 + 12,25; 73,50 + 24,50; 147,00 + 49,00 g ha -1 ) + Dash 0,5% v/v], imazethapyr (0; 75,00; 150,00 e 300,00 g ha -1 ) e imazapic (0,00; 12,25; 24,50 e 49,00 g ha -1 + Dash 0,5% v/v). As variáveis avaliadas foram: controle do arroz-vermelho efetuado aos 14, e 28 dias após a aplicação dos tratamentos (DAT) e na pré-colheita do arroz; e a intoxicação ao arroz, determinada aos 07, 14 e 21 DAT. As misturas formuladas comercialmente compostas de imazapyr + imazapic na dose recomendada (73,5 + 24,5 g ha -1 ) e de imazethapyr + imazapic no dobro da dose recomendada (150 + 50 g ha -1 ) foram eficientes para o controle de arroz-vermelho. Estas mesmas misturas também foram seletivas a cultivar Puitá Inta-CL, independentemente das doses aplicadas dos produtos. Os herbicidas imazethapyr e imazapic, não registrados para o controle de arroz-vermelho, não apresentaram controle satisfatório desta espécie daninha.Abstract -This study aimed to evaluate the control of red rice and the selectivity to commercial mutant rice varieties under application of imidazolinone herbicides. The experiment was installed in completely randomized blocks design, under factorial scheme 4x4, with four replications. Factor A was composed by the herbicides and Factor B by doses of these herbicides. The herbicides and doses were: imazethapyr + imazapic [(0.00; 37.50 + 12.50; 75.00 + 25.00 and 150.0+50.00 g ha -1 ) + Dash 0.5 v v -1 ], imazapyr + imazapic [(0.00; 36.75 + 12.25; 73.50 + 24.50 and 147.00 + 49.00 g ha -1 ) + Dash 0.5 v v -1 ], imazethapyr (0.00; 75.00; 150.00 and 300.00 g ha -1 ) and imazapic (0.00; 12.25; 24.50 and 49.00 g ha -1 + Dash 0.5 v v -1 ). The control of red rice was evaluated 14 and 28 days after treatment (DAT), as well as at the pre-harvest; toxicity to 1 Recebido para publicação em 12/03/2012 e aceito em 27/09/2012. Galon et al. 285 Rev. Bras. Herb., v.11, n.3, p.284-295, set./dez. 2012commercial rice was evaluated 7, 14 and 21 DAT. Commercially available mixtures of imazapic + imazapyr, at the recommended dose (73.5 + 24.5 g ha -1 ), and imazethapyr + imazapic at twice the dose (150.00 + 50.00 g ha -1 ) were efficient in controlling red rice. These same mixtures were also selective to the rice variety Puitá Inta-CL, independently of dose. Herbicides not registered for control of red rice, imazethapyr and imazapic, were not efficient in controlling red rice.

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“…Both of these HT technologies have been adopted very quickly and are today used worldwide (Pfenning et al 2008;Jocic et al 2011;Francischini et al 2012).…”

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confidence: 99%

“…The first Clearfield hybrids were commercially used in the United States, Argentina, and Turkey in 2003 (Tan et al 2005). Imidazolinone herbicides control well most annual monocot weeds (Francischini et al 2012). They also control many dicot weeds (Santos et al 2012), including parasitic weeds like orobanche spp.…”

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confidence: 99%

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Optimising Clearfield and ExpressSun sunflower technologies for Central European conditions

Jursík¹,

Fendrychová²,

Kolářová³

et al. 2017

Plant Prot. Sci.

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Jursík M., Fendrychová V., Kolářová M., Andr J., Soukup J. (2017): Optimising Clearfield and ExpressSun sunflower technologies for Central European conditions. Plant Protect. Sci., 53: 265-272.The efficacy and selectivity of herbicides and tank-mix combinations at different application terms in Clearfield and ExpressSun sunflowers were evaluated. Five-plot field trials (2011)(2012)(2013)(2014)(2015) were carried out in Prague. The efficacy of tribenuron (TBM) was excellent and quite rapid on chenopodium album. Its efficacy on other tested dicot weeds ranged around 90%, depending on weather conditions and growth stages of weeds. echinochloa crus-galli was not controlled by TBM. The tank-mix combination of TBM + propaquizafop (PQF) caused sunflower injury when applied in a very cold growing period. Under dry conditions, PQF efficacy on e. crus-galli was strongly reduced. The split application of TBM, when PQF was used at the second application, was less negatively affected by herbicide antagonisms. Very good results were obtained on plots with pre-emergence treatment with dimethenamid and post-emergence with TBM. The efficacy of imazamox (IZM) on dicot weeds was strongly affected by growth stages of weed and weather conditions during application. Efficacy of IZM on e. crus-galli was increased by oil adjuvant, but this adjuvant reduced IZM selectivity. The best efficacy, selectivity, and Clearfield sunflower yield were on plots with the split application of IZM.

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Uso do novo sistema Clearfield® na cultura do girassol para o controle de plantas daninhas dicotiledóneas

Cited by 6 publications

References 6 publications

Control of volunteer soybean plants in sunflower crop1

Control of volunteer soybean plants in sunflower crop1

Eficácia e seletividade de herbicidas do grupo das imizadolinonas aplicados em arroz irrigado

Optimising Clearfield and ExpressSun sunflower technologies for Central European conditions

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