Efeito da chuva sobre a eficácia de diferentes formulações de glyphosate no controle de Bidens pilosa

Werlang, R.C.; Silva, Antônio Alberto da; Ferreira, Lino Roberto; Miranda, Glauco Vieira

doi:10.7824/rbh.v4i1.8

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…RW GSA treatment, which constitutes the commercial product Roundup WG ® , which formulation is in ammonium salt, was what caused most poisoning plants, not significantly differing from the CRUCIP treatment which is Crucial ® and its formulation is based on potassium salt and isopropylamine salt (Table 2). In this case, greater control of benghal dayflower species was made with application of glyphosate formulation in ammonium salt, other authors also obtained similar results in similar conditions compared to other formulations in benghal dayflower weed (Oliveira et al, 2009), beggartick (Bidens pilosa) (Werlang et al, 2005) and southern cutgrass (Leersia hexandra e Luziola peruviana) (Scherner et al, 2014).…”

Section: Resultssupporting

confidence: 58%

Controle de trapoeraba com diferentes formulações de glyphosate

Carvalho¹,

José²,

Lopes³

et al. 2015

RBHerbicidas

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-Benghal dayflower (Commelina benghalensis L.) is a weed plant that easily infests agricultural areas due to its aggressive characteristics associated with reproductive aspects of the species. One important aspect of this plant is presenting its tolerance to the glyphosate. An experiment in greenhouse was conducted to verify the effects of different formulations and commercial products of glyphosate in controlling benghal dayflower. The experimental design was completely randomized, with four replications. The plants were grown in pots filled with eight liters of substrate each, consisting of soil, sand and tanned cattle manure until they have reached the stage of development of the second growth sector, when the following products and their commercial formulations were applied: Roundup Original ® -isopropylamine salt; Trop ® -isopropylamine salt; Roundup WG ® -ammonium salt; Zapp QI ® -potassium salt; Roundup Transorb R ® = potassium salt and Crucial ® -isopropylamine salt + potassium salt. The intoxication of benghal dayflower plants was visually assessed at 7, 14 and 21 days after application of the products, and leaf area, dry matter of leaves, dry matter of the stem, dry matter of root and total dry matter at 21 days after application. The treatments show significant differences in the toxicity of the plants after 14 days of application, and at 21 days it was found that the products Roundup WG ® and Crucial ® were more toxic to plants. The products Roundup WG ® and Crucial ® were highlighted with greater reductions in dry matter of the leaves, stem and total plant. In general, the benghal dayflower has not been effectively controlled by the products at the doses tested and/or by the application after the emission of the second branch of weed. Among the commercial formulations or products, the ammonium salt is highlighted -Roundup WG ® and the mixture of isopropylamine salt with potassium salt -Crucial ® presents higher efficiency in weed control. Keywords: Commelina benghalensis; isopropylamine salt; potassium salt; ammonium salt Resumo -A trapoeraba (Commelina benghalensis L.) é uma planta daninha que infesta facilmente áreas agrícolas devido à suas características de agressividade associadas aos aspectos reprodutivos da espécie. Um dos aspectos importantes desta planta apresentar é sua tolerância ao herbicida glyphosate. Um experimento em ambiente protegido foi realizado para verificar os efeitos de diferentes formulações e produtos comerciais do herbicida glyphosate no controle da trapoeraba. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro 1 Received for publication on 21/10/2015 and approved on 11/01/2016.

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Section: Resultssupporting

confidence: 58%

Controle de trapoeraba com diferentes formulações de glyphosate

Carvalho¹,

José²,

Lopes³

et al. 2015

RBHerbicidas

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“…When comparing the results in each environment, it was observed that the necessary dose to obtain 90% of control in the field for black picker was 10 and 19 times greater than the experiment in greenhouse and BOD, and for horseweed, it was 8 and 22 times greater, respectively. The differences across the control levels observed in the field may be a result of the environmental factors, such as soil humidity, radiation, temperature and relative air humidity, which may affect the characteristics of the plant, such as inducing the development of a thicker cuticle, trichomes and deeper root system, and the efficiency of the herbicide, since in BOD and in the greenhouse there is a greater control over these factors (Werlang et al, 2005). These results show the importance of the environmental conditions to the quality of the application and the control results obtained with saflufenacil in the studied species.…”

Section: (A) (D) (B) (E) (C) (F)mentioning

confidence: 99%

Rapid Detection of Horseweed and Black Picker Sensitivity Levels to Saflufenacil

Várgas

Henckes

Gava³

et al. 2019

Planta daninha

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Resistance to herbicides is one of the main factors responsible for weed control failures. Once uncontrolled and stressed, resistant weeds demand a new application of herbicides from different modes of action, which results in higher monetary costs and environmental impact. Knowledge of weed sensitivity levels to herbicides before making decisions for their management in the field is paramount to increasing the efficiency of integrated weed management. Thus, methods that allow the rapid determination of sensitivity levels can help to the correct recommendation before the application, and thus, favor the greater technical, economic and environmental efficiency of weed management. The objective of this work was to validate a rapid method to detect the levels of sensitivity of black picker (Bidens pilosa) and horseweed (Conyza sumatrensis) to saflufenacil. Dose-response experiments were performed in growth chamber, greenhouse and field. The control provided by different doses of the saflufenacil herbicide was evaluated in each environment, and the results correlated within each species. The results showed a significant positive correlation for the results obtained in growth chamber and greenhouse for black picker and horseweed. These results indicate that the method developed in the growth chamber can replace greenhouse tests for determination of the sensitivity of black picker and horseweed to saflufenacil.

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“…Its formulation contains the isopropylamine which also is also present in Roundup Original formulation (Rodrigues and Almeida, 2005). Different formulations can change the absorption and translocation of the herbicide, influencing the control efficiency (Silva et al, 2006) and its behavior in the environment (Werlang et al, 2005;Santos et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Absorption and translocation tolerance of glyphosate

Meschede¹,

Silva²,

Fernandes³

et al. 2015

Afr. J. Agric. Res.

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The purpose of this experiment was to relate the tolerance of Commelina benghalensis to two different kinds of glyphosate formulation, in function of the absorption time and translocation of this molecule in the cells of this plant. The experiment was conducted in a greenhouse. The experimental design is a completely randomized design (CRD), with four treatments follows; glyphosate potassium salt and isopropylamine tested with commercial dosage, haematoxylin dye and a control, with three repetitions. Sample from the leaves, stems and roots were collected and subdivided in twenty-five subsamples. The evaluations were performed by microscopic views every 30 min, until the herbicide was absorbed into the parenchyma of the mesophyll. After 30 min of the application of isopropylamine glyphosate, there was accumulation of this molecule inside leaf apoplast which indicated the process of penetration of isopropylamine glyphosate. For the glyphosate potassium salt the absorption was observed 2 h after application. After 7 h, the presence of a small concentration of the product in the stem was verified. 12 h later, a low concentration was verified in the root. After 36 h the phloem was full of the isopropyl amine salt glyphosate, 86 h later its presence in the xylem and phloem, together with the symptoms of destruction of the parenchyma tissue was visualized. The solution with isopropyl amine salt, after 7 h, was seen in the phloem, with a 12 h concentration of isopropyl amine salt decrease in the stem, which overloaded the phloem of the root. After 86 h, all the parenchyma tissue of the xylem and phloem were destructed. The absorption and translocation of glyphosate depended on its formulation, which represented more or less tolerance of the plant to the herbicide, but tolerance was not the only factor influenced by anatomy, the physiological, biochemical and genetic features were also critical.

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Efeito da chuva sobre a eficácia de diferentes formulações de glyphosate no controle de Bidens pilosa

Cited by 3 publications

References 13 publications

Controle de trapoeraba com diferentes formulações de glyphosate

Controle de trapoeraba com diferentes formulações de glyphosate

Rapid Detection of Horseweed and Black Picker Sensitivity Levels to Saflufenacil

Absorption and translocation tolerance of glyphosate

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