Using soil-applied herbicides in combination with glyphosate in a glyphosate-resistant cotton herbicide program

Grichar, W. James; Besler, Brent A.; Brewer, Kevin; Minton, Brad W.

doi:10.1016/j.cropro.2004.03.004

Cited by 24 publications

(24 citation statements)

References 7 publications

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“…Isso significa a possibilidade de utilizar um herbicida com efeito residual (pyrithiobac-sodium) no controle de plantas daninhas no algodão transgênico em pós-emergência, sem que haja redução no rendimento dessa cultura (Grichar et al, 2004).…”

Section: Resultsunclassified

Seletividade de amonio-glufosinate isolado e em mistura com pyrithiobac-sodium em algodoeiro transgênico LL®

Braz¹,

Oliveira²,

Constantin³

et al. 2012

Planta daninha

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RESUMO -Com a recente introdução no Brasil de variedades transgênicas de algodoeiro que apresentam resistência ao amonio-glufosinate (LL ® ), há escassez de informações tanto a respeito da seletividade de reaplicações desse herbicida, quanto no que se refere a misturas com outros herbicidas. Objetivou-se no presente trabalho avaliar a seletividade de aplicações sequenciais de amonio-glufosinate isolado e em associação com pyrithiobac-sodium em algodão transgênico LL ® . Dessa forma, foi instalado um experimento em delineamento de blocos casualizados em arranjo fatorial (3x3)+1, empregando-se oito repetições. O primeiro fator correspondeu à aplicação dos tratamentos amonio-glufosinate (500 g ha -1) e amonio-glufosinate + pyrithiobac-sodium (500 + 42 g ha -1 e 500 + 56 g ha -1). O segundo fator foi o número de aplicações sequenciais em pós-emergência do algodoeiro (uma, duas ou três). O tratamento adicional foi composto por testemunha sem aplicação de herbicida. A associação do pyrithiobacsodium ao amonio-glufosinate causou maiores níveis de fitointoxicação inicial, embora não tenham havido mais sintomas duas semanas após as aplicações. A qualidade de fibra do algodoeiro não foi influenciada por nenhum dos tratamentos herbicidas. O amonio-glufosinate isolado foi seletivo para o algodão LL ® em até três aplicações em pós-emergência. O algodoeiro apresentou ainda tolerância a uma aplicação da mistura de amonio-glufosinate + pyrithiobacsodium, e não se observou qualquer efeito negativo sobre a produtividade de algodão em caroço. Palavras-chave:Gossypium hirsutum, fitointoxicação, inibidor da glutamina sintetase, inibidor de ALS, mistura em tanque. ). The second factor was the number of sequential post-emergence applications (one, two, or three) ABSTRACT -Due to the recent introduction of transgenic cotton varities with resistance to ammonium-glufosinate (LL

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Section: Resultsunclassified

Seletividade de amonio-glufosinate isolado e em mistura com pyrithiobac-sodium em algodoeiro transgênico LL®

Braz¹,

Oliveira²,

Constantin³

et al. 2012

Planta daninha

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“…Trends in cotton yield reflected through weed control, which was further proved through glyphosate application system provided 96 per cent control of weeds, producing greater than 950 kg·ha −1 of seed lint cotton [9].…”

Section: Evaluation Of Weed Control Efficacy and Seed Cotton Yield Inmentioning

confidence: 99%

Evaluation of Weed Control Efficacy and Seed Cotton Yield in Glyphosate Tolerant Transgenic Cotton

Chinnusamy¹,

Chinnagounder²,

Krishnan³

2013

AJPS

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Cotton is one of the important crops that have been genetically altered to address challenges with weed and insect control. The research was conducted with glyphosate resistant cotton hybrids during winter irrigated season of 2009-10 and 2010-11 at the experimental site of Tamil Nadu Agricultural University, Coimbatore, with the objective, to find out the weed control efficacy and yield of transgenic cotton hybrid with the application of glyphosate. Glyphosate was applied as post-emergence application on 25 and 65 DAS at 900, 1350, 1800, 2700, 3600 and 5400 g a.e./ha in MRC 7347 BG-II RRF test hybrid. These treatments were compared with hand weeding on 15 and 30 DAS and unweeded control. In both sprays, post-emergence application of glyphosate 2700, 3600 and 5400 g a.e./ha registered lower weed density and higher weed control efficiency in transgenic cotton hybrid compared with other treatments. Seed cotton yield (3195 and 3092 kg·ha -1 during 2009-10 and 2010-11 respectively) was significantly higher in post-emergence application of glyphosate at 2700 g a.e./ha. Increased use of transgenic cotton with herbicide and pest resistance has resulted in more efficient insect and weed management practices.

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“…Higher yield attributes of increased cob length, cob girth and number of grains per cob and test weight were recorded with post emergence application of glyphosate at 1800 g a.e ha -1 in both the transgenic and conventional maize hybrids of 30V92 and 30B11 respectively. This might due to better control of weeds at critical stages and shifted the balance in favour of crop in the utilization of nutrients, moisture, light and space and creates the favourable environment for recording higher growth of maize leading to enhanced yield attributes [15]. Among the weed control treatments methods, lower weed index was recorded with 9.09 and 10.15 per cent in transgenic 30V92 (T 1 ) and 30B11 (T 5 ) whereas at conventional maize hybrids observed glyphosate at 1350 g a.e ha -1 recorded lower weed index of 7.75 and 15.23 per cent in non transgenic maize hybrids of 30V92 (T 2 ) and 30B11 (T 5 ).…”

Section: Effect On Cropmentioning

confidence: 99%

Evaluation of Weed Control Options for Herbicide Resistant Transgenic Stacked (TC 1507 X NK603) and Conventional Maize Hybrids for Higher Productivity

Kannan¹,

Chinnagounder²

2013

AJPS

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Weeds are posing a serious problem in maize. The congenial climatic conditions encourage more weed growth in the widely spaced crop like maize and cause yield reduction to the tune of 29 to 70 percent. A field experiment was conducted for two years at Tamil Nadu Agricultural University, Coimbatore during kharif seasons of 2010 and 2011 to evaluate the weed management options for transgenic stacked (TC 1507 & NK 603) and conventional maize hybrids. The experiments were conducted with the following objective to evaluate the weed control efficiency and crop productivity with K salt of glyphosate formulations under field conditions. Treatments consisted of two transgenic stacked hybrids named 30V92 and 30B11 applied with glyphosate as early post emergence at 900 and 1800 g a.e ha -1 during kharif, 2010 and conventional maize hybrids named 30V92 and 30B11 applied with glyphosate by controlled droplet application method at 900, 1350 and 1800 g a.e ha -1 during kharif, 2011 compared with non transgenic counterpart maize hybrids applied with pre emergence atrazine at 0.5 kg ha -1 followed by one hand weeding on 40 DAS with and without insect management. Based on the two years field experimentation, it was found that early post emergence application of glyphosate at 1800 g a.e ha -1 gave significantly lower weed density, weed dry weight and higher weed control efficiency at all the intervals. Higher grain yield was registered with post emergence application of glyphosate at 1800 g a.e ha -1 in transgenic and conventional maize hybrid of 30V92 (12.21 t ha -1 and 11.23 t ha -1 ) during both seasons of the study. Unweeded control accounted for grain yield which in turn reflected through higher weed index of 58.39 and 57.26 per cent, respectively during both the years, due to heavy competition of weeds for nutrients, space and light.

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Using soil-applied herbicides in combination with glyphosate in a glyphosate-resistant cotton herbicide program

Cited by 24 publications

References 7 publications

Seletividade de amonio-glufosinate isolado e em mistura com pyrithiobac-sodium em algodoeiro transgênico LL®

Seletividade de amonio-glufosinate isolado e em mistura com pyrithiobac-sodium em algodoeiro transgênico LL®

Evaluation of Weed Control Efficacy and Seed Cotton Yield in Glyphosate Tolerant Transgenic Cotton

Evaluation of Weed Control Options for Herbicide Resistant Transgenic Stacked (TC 1507 X NK603) and Conventional Maize Hybrids for Higher Productivity

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