Sinergismo na combinação de glifosato e saflufenacil para o controle de buva

Dalazen, Giliardi; Kruse, Nelson Diehl; Machado, Sérgio Luiz de Oliveira; Balbinot, Andrisa

doi:10.1590/1983-40632015v4533708

Cited by 31 publications

(38 citation statements)

References 20 publications

(16 reference statements)

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“…Similar results were obtained with the mixture of glyphosate with saflufenacil and glyphosate with dicamba, where there was over 98% control on resistant biotypes of C. canadensis in soybean (Budd et al, 2016). This association, as well as presenting a different action mechanism, may have been helped by the occurrence of molecule synergism, which improved absorption and translocation and allowed the increase in control levels (Dalazen et al, 2015b;Budd et al, 2016).…”

Section: Resultssupporting

confidence: 72%

Eficiência técnica e retorno econômico do manejo de buva resistente ao glyphosate em pré-emergência da soja

et al. 2017

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-The commercial release of the Roundup Ready ® soybean helped the management of weeds and allowed the application of glyphosate during the post-emergence of the culture. However, the intensive use of this herbicide selected resistant hairy fleabane biotypes and hindered control. Many works evaluate the technical effectiveness of herbicides, however, most of the times; the economic return is not analyzed when making decisions about the choice of which herbicide to apply. The aim of this work was to evaluate the technical effectiveness and the economic return of applying herbicide associations and rates in the management of glyphosate-resistant hairy fleabane, in soybean pre-emergence. The experiment was carried out in randomized block design with four replicates. Treatments consisted in associations among glyphosate, 2.4-D, saflufenacil, diclosulam, chlorimuron-ethyl and flumioxazin. The analyzed variables were hairy fleabane control and phytotoxicity on soybean on 7, 14, 21 and 35 days after the application and yield of soybean. The economic return of treatments was calculated according to the cost of the herbicides and the soybean yield. Results about control and yield shows that the association of glyphosate, chlorimuron-ethyl, flumioxazin and 2.4-D and of glyphosate, chlorimuron-ethyl, 2.4-D and saflufenacil presented the best technical effectiveness response and the use of glyphosate, chlorimuron-ethyl and 2.4-D presented the best economic return. However, the increase in chlorimuron-ethyl rates and its association with flumioxazin did not improve the control of hairy fleabane. Keywords: Conyza spp.; control; cost; herbicide association Resumo -

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Section: Resultssupporting

confidence: 72%

Eficiência técnica e retorno econômico do manejo de buva resistente ao glyphosate em pré-emergência da soja

et al. 2017

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“…The results of the experiments indicate that saflufenacil has great potential in controlling Conyza spp., but when the plant is at a development stage above 15 cm and the herbicide is used alone or in association in a single application, the possibility of regrowth is high. Dalazen et al (2015) observed that the isolated application of saflufenacil resulted in sprouts of Conyza bonariensis and this emphasizes that the association of glyphosate + saflufenacil, as well as controlling horseweed, can stop post-application regrowth. However, when saflufenacil is used in a sequential management, the regrowth potential is reduced.…”

Section: Methodsmentioning

confidence: 91%

Management of Resistant Conyza spp. During Soybean Pre-sowing

et al. 2019

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Horseweed (Conyza spp.) is a weed with a considerable presence and frequency throughout Brazilian crops, as well as presenting difficult chemical control. The objective of this study was to evaluate the efficiency of herbicide management, through single and sequential applications, in controlling Conyza spp., at two development stages with 4 to 6 leaves (3 to 5 cm) and 20 leaves (15-20 cm). The analyzed variables were: control percentage (7, 14, 21, and 28 days after application), dry matter content (28 days after application) and regrowth percentage (21 days after application). Data were submitted to analysis of variance at 5% probability and when there was a difference, the means were submitted to the Scott-Knott test. For Conyza spp. plants with a height between 3 and 5 cm and 4 to 6 leaves, the best treatments were T4, T8, T9, T10, T11, T12, T13, and T14, presenting a control percentage above 90%, 7 days after application. For Conyzaspp. plants with a plant development of 15 cm in height and 15 to 20 leaves, the highest control percentages and lowest regrowth percentages were with treatments T9, T13, and T14.

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“…O efeito supressor da espécie pela mistura de glifosato + saflufenacil é explicado, segundo Dalazen et al (2015) pelas propriedades do saflufenacil que permitem mobilidade via floema e sua combinação com glifosato, promove sinergismo entre os herbicidas para controle de buva (Conyza bonariensis) e ainda previne rebrote das plantas. Agostineto et al (2016) constataram ação parecida de carfentrazone e saflufenacil devido à similaridade no mecanismo de ação e demonstraram que a mistura desses herbicidas com glifosato proporciona aumento na eficácia de controle de Ipomoea hederifolia.…”

Section: Resultsunclassified

Estágios Fenológicos Associados Ao Controle Químico No Manejo De Spermacocea Densiflora Originada De Sementes E Rebrota

et al. 2019

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A seleção da espécie Spermacoceae densiflora tem sido verificada em áreas com o uso contínuo do herbicida glifosato. O objetivo deste trabalho foi avaliar o efeito de herbicidas isolados ou associados ao glifosato aplicados em pós-emergência no controle de S. densiflora em plantas oriundas de sementes e de rebrota, em diferentes estádios fenológicos. Em ambos os casos, utilizou-se o delineamento experimental inteiramente casualizado, com 5 repetições, em esquema fatorial 2 x 17 + 1, sendo dois estádios fenológicos da planta daninha (4 e 8 folhas totalmente expandidas) e 16 tipos de controle químico mais a testemunha sem herbicida. Os tratamentos químicos foram: glifosato (1.440 g i.a ha-1), glufosinato de amônio (500 g i.a ha-1), 2,4-D (1.000 g i.a ha-1), chlorimuron-ethyl (20 g i.a ha-1), carfentrazone-ethyl (920 g i.a ha-1), flumioxazin (50 g i.a ha-1), s-metolachlor (960 g i.a ha-1), imazethapyr (100 g i.a ha-1), saflufenacil (50 g i.a ha-1) e a associação de glifosato com estes herbicidas, exceto com glufosinato. No segundo ensaio, plantas de S. densiflora foram cortadas rente ao solo e as plantas oriundas dos rebrotes com diferentes estádios fenológicos (4 e 8 folhas) foram submetidos aos respectivos tratamentos químicos do ensaio 1. No estádio inicial de aplicação destacaram-se os tratamentos glufosinato de amônio, flumioxazin, glifosato + chlorimuron, glifosato + flumioxazin e glifosato + saflufenacil, com controle acima de 96,00%. Para as aplicações mais tardias, os respectivos tratamentos mantiveram elevado controle (acima de 88,00%) excetuando-se glifosato + chlorimuron com 48% de controle. Para plantas oriundas de rebrote todos os tratamentos avaliados não foram eficazes no controle da espécie.

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Sinergismo na combinação de glifosato e saflufenacil para o controle de buva

Cited by 31 publications

References 20 publications

Eficiência técnica e retorno econômico do manejo de buva resistente ao glyphosate em pré-emergência da soja

Eficiência técnica e retorno econômico do manejo de buva resistente ao glyphosate em pré-emergência da soja

Management of Resistant Conyza spp. During Soybean Pre-sowing

Estágios Fenológicos Associados Ao Controle Químico No Manejo De Spermacocea Densiflora Originada De Sementes E Rebrota

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