Sulfentrazone: Environmental Dynamics and Selectivity

Gehrke, Vinicios Rafael; Camargo, Edinalvo Rabaioli; Avila, Luis Antônio de

doi:10.1590/s0100-83582020380100032

Cited by 6 publications

(4 citation statements)

References 78 publications

(140 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These groups can be identified when their molecular structures are evaluated (Electronic Supplementary Material-2 ). Although sulfentrazone also binds to iron and aluminum oxides due to its zwitterionic ion behavior in neutral form [ 34 , 35 , 36 ], the sulfentrazone is adsorbed more slowly than glyphosate, favoring the formation of a soil-glyphosate-sulfentrazone complex. This interaction between glyphosate and sulfentrazone would be possible since sulfentrazone is adsorbed more slowly than glyphosate, forming a soil-glyphosate-sulfentrazone complex.…”

Section: Resultsmentioning

confidence: 99%

Influence of Glyphosate Formulations on the Behavior of Sulfentrazone in Soil in Mixed Applications

Langaro

Souza

Pereira

et al. 2020

Toxics

View full text Add to dashboard Cite

The selection of weed biotypes that are resistant to glyphosate has increased the demand for its use mixed with other herbicides, such as sulfentrazone. However, when chemical molecules are mixed, interactions may occur, modifying the behavior of these molecules in the environment, such as the sorption and desorption in soil. In this study, we hypothesized that the presence of glyphosate-formulated products might increase the sorption or decrease the desorption of sulfentrazone, thereby increasing the risk of the contamination of water resources. Therefore, our work aimed to evaluate the sorption, desorption, and leaching of sulfentrazone in the soil in an isolated and mixed application with different glyphosate formulations. The sorption coefficients (Kfs) for the sulfentrazone, sulfentrazone + Roundup Ready, sulfentrazone + Roundup Ultra, and sulfentrazone + Zapp Qi foram were 1.3, 2.1, 2.3, and 1.9, respectively. The desorption coefficients (Kfd) for the sulfentrazone, sulfentrazone + Roundup Ready, sulfentrazone + Roundup Ultra, and sulfentrazone + Zapp Qi foram were 65.7, 125.2, 733.3 and 239.8, respectively. The experiments demonstrated that the sorption and desorption of sulfentrazone in combination with the other formulated glyphosate products are altered, supporting the hypothesis suggested by this work, i.e., that the presence of other molecules is a factor that affects the behavior of herbicides in the soil. This phenomenon altered the vertical mobility of sulfentrazone. Situations involving mixtures of pesticides should be evaluated in order to improve our understanding of the dynamics of these molecules and thus avoid environmental contamination.

show abstract

Section: Resultsmentioning

confidence: 99%

Influence of Glyphosate Formulations on the Behavior of Sulfentrazone in Soil in Mixed Applications

Langaro

Souza

Pereira

et al. 2020

Toxics

View full text Add to dashboard Cite

show abstract

“…An even more expressive recovery was observed after the application of pre-emergence herbicides, pendimethalin and sulfentrazone + diuron, which showed 16 and 25% phytotoxicity at seven DAT, but 0 and 6% at 28 DAT. This may be related to the ability of plants to metabolize herbicides, as reported for tolerant plants exposed to sulfentrazone (Melo et al 2019, Gehrke et al 2020, diuron (Sousa et al 2018), and pendimethalin (Nunes et al 2018).…”

Section: Herbicides Selectivity In Barleymentioning

confidence: 86%

Selectivity and efficacy of herbicides applied on barley for weed control

et al. 2023

View full text Add to dashboard Cite

Ryegrass and turnip are weeds that cause high yield losses when infesting barley, thus requiring adequate management. In this context, the aim of this study was to evaluate the selectivity of different herbicide treatments and weed control in the barley crop, cultivar BRS Cauê. Two field experiments were conducted in randomized blocks, with four replications. The treatments used were: pendimethalin (800 g•ha -1 ), sulfentrazone + diuron (175 + 350 g•ha -1 ), and imazaquim (150 g•ha -1 of a. e.) applied pre-emergence; and iodosulfuron (3.5 g•ha -1 ), pyroxsulam (18 g•ha -1 ), metsulfuron-methyl (3.96 g•ha -1 ), 2,4-D (670 g•ha -1 of a. e.), clodinafop-propargyl (48 g•ha -1 ), bentazon + imazamox (600 + 28 g•ha -1 ), saflufenacil (49 g•ha -1 ), bentazon (720 g•ha -1 ), carfentrazone-ethyl (120 g•ha -1 ), and imazamox (42 g•ha -1 ) applied post-emergence, with two controls (one weeded and the other infested). The use of the herbicide imazaquim caused high levels of phytotoxicity in barley. Gas exchange was less responsive to herbicide applications in relation to barley phytotoxicity and productivity.Clodinafop-propargil showed the best control of ryegrass, while the herbicides iodosulfuron, pyroxsulam, metsulfurom-methyl, 2,4-D, bentazon + imazamox, saflufenacil, bentazon, carfentrazone-ethyl, and imazaquim showed high efficiency in the control of turnip species. Imazaquim caused reduction of up to 74.7% in barley grain yield. On the other hand, iodosulufuron and piroxsulam allowed the highest grain yields of the barley cultivar, BRS Cauê, by promoting partial control of ryegrass and total control of turnip species, followed by clodinafop-propargyl and metsulfuron-methyl, which controlled ryegrass and turnip, respectively, allowing an increase in yield grain in relation to the infested control.

show abstract

“…Emerged weeds at the time of flumioxazin application show necrosis within hours of treatment and desiccate in days (Shaner 2014). Flumioxazin breaks down quickly in soil and water, primarily through microbial activity and hydrolysis (Ferrell and Vencill 2003), with half-lives of less than 1 d in water (USEPA 2003) and less than 20 d in soil (Ferrell and Vencill 2003); this is much shorter than the half-lives of other PPO herbicides like sulfentrazone (Gehrke et al 2020). Flumioxazin provides residual weed control up to 14 wk (OMAFRA 2009).…”

Section: Introductionmentioning

confidence: 99%

Biologically effective dose of flumioxazin and pyroxasulfone for control of multiple herbicide–resistant waterhemp (Amaranthus tuberculatus) in soybean

et al. 2022

View full text Add to dashboard Cite

Two studies were conducted to ascertain the biologically-effective-dose (BED) of flumioxazin and pyroxasulfone for multiple-herbicide-resistant (MHR) waterhemp [Amaranthus tuberculatus (Moq.) Sauer] control in soybean [Glycine max (L.) Merr.] in southwestern Ontario, Canada, during 2016 and 2017. In the flumioxazin study, the predicted flumioxazin doses for 50, 80 and 90% MHR A. tuberculatus control were 19, 37, and 59 g ai ha−1 at 2 weeks after application (WAA) and 31, 83, and 151 g ai ha−1, respectively, at 12 WAA. The predicted flumioxazin doses to cause 5 and 10% soybean injury were 129 and 404 g ai ha−1, respectively at 2 weeks after emergence (WAE), and the predicted flumioxazin doses to obtain 50, 80, and 95% of the weed-free control plot’s yield were determined to be 3, 14, and 65 g ai ha−1, respectively. In the pyroxasulfone study, the predicted pyroxasulfone doses that provided 50, 80, and 90% MHR A. tuberculatus visual control were 25, 50, and 88 g ai ha−1 at 2 WAA and 41, 109, and 274 g ai ha−1 at 12 WAA, respectively. 117 g ai ha−1 was the dose of pyroxasulfone predicted for 80% reduction in MHR A. tuberculatus density and the predicted doses of pyroxasulfone for 80 and 90% reduction in A. tuberculatus biomass were 204 and 382 g ai ha−1, respectively. The predicted doses of pyroxasulfone that caused 5 and 10% injury in soybean at 2 WAE were 585 and 698 g ai ha−1, respectively. 6, 24 and 112 g ai ha−1 was the predicted doses of pyroxasulfone required to obtain 50, 80, and 95% yield relative to the weed-free plots, respectively. Flumioxazin and pyroxasulfone applied PRE at the appropriate doses provided early-season MHR A. tuberculatus control in soybean.

show abstract

Sulfentrazone: Environmental Dynamics and Selectivity

Cited by 6 publications

References 78 publications

Influence of Glyphosate Formulations on the Behavior of Sulfentrazone in Soil in Mixed Applications

Influence of Glyphosate Formulations on the Behavior of Sulfentrazone in Soil in Mixed Applications

Selectivity and efficacy of herbicides applied on barley for weed control

Biologically effective dose of flumioxazin and pyroxasulfone for control of multiple herbicide–resistant waterhemp (Amaranthus tuberculatus) in soybean

Contact Info

Product

Resources

About