Selectivity of glyphosate tank mixtures for RR soybean

Alonso, Diego Gonçalves; Constantin, Jamil; Oliveira, Rubem Silvério de; Arantes, J.G.Z.; Cavalieri, S.D.; Santos, Geraldo Tadeu dos; Rios, Fabiano Aparecido; Franchini, Luiz Henrique Morais

doi:10.1590/s0100-83582011000400024

Cited by 9 publications

(9 citation statements)

References 20 publications

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“…Moreover, ALONSO et al (2013), for application of glyphosate, isolated or combined with cloransulam, chlorimuron or lactofen, verified a reduction in the height of RR soybean plants at 90 DAA, only for the application of glyphosate + lactofen and reduction in the 1,000-seed weight for glyphosate + lactofen or cloransulam. Nonetheless, none of these treatments reduced the number of pods per plant or yield.…”

Section: Resultsmentioning

confidence: 86%

Glyphosate, isolated or in associations, at agronomic performance and seed quality of the RR®2 soybean

et al. 2018

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The “second generation” of glyphosate-tolerant soybean (RR®2 soybean) was developed through a different technique of insertion of the glyphosate-insensitive EPSPs gene. Information on the selectivity of glyphosate, alone or in combination, in RR2 soybean is lacking. This study evaluated the effects of glyphosate, isolated or in associations, applied at post-emergence (V4), at agronomic performance and seed quality of soybean cultivar NS 6700 IPRO (RR2). The experimental design was randomized block with four replications and seven treatments, conducted in the field for two growing seasons. The treatments consisted of glyphosate herbicide, alone or in combination with clethodim, cloransulam, chlorimuron, lactofen and fluazifop, besides the control without application. Analysis was performed for crop injury, Soil and Plant Analyzer Development (SPAD) index, as well as variables related to agronomic performance (height, number of pods per plant, yield and 1,000-seed weight) and seed quality (vigor, germination, abnormal seedlings and dead seeds). An additional test was conducted with the same cultivar and treatments in a greenhouse in a completely randomized design with four replications. The herbicides did not affect agronomic performance and seed quality of RR2 soybean. Thus, the soybean cultivar NS 6700 IPRO (RR2) was tolerant to glyphosate, alone or combined with other herbicides applied in post-emergence (V4).

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Section: Resultsmentioning

confidence: 86%

Glyphosate, isolated or in associations, at agronomic performance and seed quality of the RR®2 soybean

et al. 2018

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“…Entretanto, a aplicação da mistura de glyphosate + lactofen (960+72 g ha -1 de i.a.) no estádio V2-V3 da cultivar de soja CD 214 RR, promoveu a redução de 13,5% na produtividade da cultura quando comparada a aplicação isolada de glyphosate (Alonso et al, 2011 Correlação significativa (0,67) entre altura de planta e acamamento foi verificada (Tabela 2), o que indica que a redução da altura pelos inibidores da PROTOX (Figura 2 e Tabela 2) pode ter auxiliado no controle do acamamento, visto que plantas de tamanho menor, estão menos sujeitas a acamarem. O acamamento pode trazer sérios prejuízos à produção, especialmente na colheita mecanizada (Cato e Castro, 2006;Silva, 2008;Buzzello et al, 2013).…”

Section: Introductionunclassified

Ação de herbicidas inibidores da PROTOX sobre o desenvolvimento, acamamento e produtividade da soja

et al. 2016

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Resumo -A soja é a espécie leguminosa mais importante mundialmente e por isso investimentos em tecnologia são necessários para o aumento da produtividade e redução de fatores adversos à cultura. Na região Sul do Brasil, são frequentes os problemas ocasionados pelo acamamento de plantas de algumas cultivares de soja. Este trabalho objetivou avaliar os efeitos da aplicação de herbicidas inibidores da enzima Protoporfirinogênio Oxidase (PROTOX) sobre o desenvolvimento, rendimento de grãos e componentes e sobre o acamamento das plantas do cultivar de soja CD 214 RR. O experimento foi conduzido a campo, em delineamento blocos ao acaso, com quatro repetições, em esquema bifatorial. O fator A foi constituído por cinco tratamentos herbicidas: carfentrazone nas doses 6, 10 e 22 g ha -1 de i.a., lactofen 144 g ha -1 de i.a. e testemunha sem aplicação. O fator B foi constituído por seis épocas de avaliação de injúria e sete épocas para altura de planta e acamamento. Foram determinadas a injúria, altura, acamamento, componentes e rendimento de grãos de soja e rendimento biológico aparente. Os herbicidas lactofen e carfentrazone reduziram a altura e, consequentemente, o acamamento das plantas de soja. Carfentrazone foi mais fitotóxico e mais eficaz em reduzir a altura de plantas de soja do que lactofen. Lactofen resultou em rendimento de grãos de soja mais elevados do que as diferentes concentrações de carfentrazone, embora ambos não tenham diferido do rendimento de grãos da testemunha sem herbicidas. Palavras-chaves: carfentrazone-ethyl; Glycine max; lactofen Abstract -Soybean is the most important leguminous species worldwide and therefore investments in technologies are needed to increase productivity and reduce adverse factors to the crop. In Southern Brazil, there are often problems caused by lodging of plants from some soybean cultivars. This study aimed to evaluate the effects of application of Protoporfirinogênio Oxidase 1 Recebido para publicação em

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“…In our two experiments, glyphosate does not affect soybean. However, there are reports indicating that a sequential spraying of glyphosate caused toxic effects on soybean, increasing the time required to ensure the closing canopy of crop (Alonso et al, 2013;Albrecht et al, 2014b;Gomes et al, 2017;Krenchiski et al, 2017). According to these authors, the toxic effects occur due to a sum of stresses caused by the herbicide in a sequential spraying as well as the effects on plant physiology.…”

Section: Glyphosate and Phosphate Fertilizationmentioning

confidence: 99%

Glyphosate resistant soybean growth and yield affected by glyphosate and phosphate fertilization

Barroso¹,

Carvalho²

2018

Aust J Crop Sci

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Glyphosate is the most used herbicide worldwide and glyphosate-tolerant soybean planted in almost all cultivated areas. In Brazil, the area cultivated with transgenic soybean reaches more than 90%. Recently, the application of glyphosate in tolerant soybean has assumed the possibility to injury the crop under certain conditions and herbicides formulations. Phosphate fertilization can directly influence glyphosate uptake in plants because glyphosate translocation inside cells is related with phosphate transporters. Therefore, a study was conducted in two steps intended to determine if different doses of phosphate fertilization and/or glyphosate mode of spraying could modify glyphosate susceptibility of glyphosate-tolerant soybean, affecting crop development and yield. We tested two glyphosate doses and its interaction with mode of spraying and different glyphosate doses interaction with phosphate soil-fertilization. Experiment I was set up in a two by two factorial design, testing two doses of isopropylamine salt glyphosate (960 and 1,440 g ae ha -1 ) and two modes of glyphosate application (single spraying and sequential spraying). Experiment II was set up in a two by three factorial design, testing two doses of glyphosate (960 and 1,440 g ae ha -1 ) and three doses of phosphate fertilization (54, 108 and 162 kg ha -1 of P 2 O 5 ). In both experiments, weed community was evaluated based on number of individuals and their respective dry mass accumulation. Crop was evaluated in dry mass of leaves, dry mass of stem, dry mass of pods, dry mass of shoot, plant height and grain yield. The use of glyphosate in a sequential spraying (960 + 480 g ae ha -1 ) or in higher dose (1,440 g ae ha -1 ) provides a highly efficient weed control and a high-performance crop growth and yield. The additional soil-fertilization with phosphate in this case does not affect soybean since no crop injury was observed.

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Selectivity of glyphosate tank mixtures for RR soybean

Cited by 9 publications

References 20 publications

Glyphosate, isolated or in associations, at agronomic performance and seed quality of the RR®2 soybean

Glyphosate, isolated or in associations, at agronomic performance and seed quality of the RR®2 soybean

Ação de herbicidas inibidores da PROTOX sobre o desenvolvimento, acamamento e produtividade da soja

Glyphosate resistant soybean growth and yield affected by glyphosate and phosphate fertilization

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