Effects of Soil Factors on Phytotoxicity and Dissipation of Sulfentrazone in Canadian Prairie Soils

Szmigielski, Anna M.; Schoenau, Jeff J.; Johnson, Eric N.; Holm, F.A.; Sapsford, K.L.; Liu, Juxin

doi:10.1080/00103624.2012.653025

Cited by 15 publications

(7 citation statements)

References 21 publications

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“…The Brazilian Cerrado soils generally contain high levels of organic matter (3.2 dag kg -1 soil in the present study) and exhibit pH values below 6.56 [the pKa of sulfentrazone (Rodrigues & Almeida, 2018)]. In this condition, weakly acidic herbicides as sulfentrazone exist in the non-ionic form in soils (Grey et al, 1997(Grey et al, , 2000Ohmes & Mueller, 2007;Szmigielski et al, 2012). So, nonionic sulfentrazone molecules cannot be absorbed by plants, despite their high lipophilicity and permeability to cell membranes (Ferrell et al, 2003), and generate only mild intoxication symptoms.…”

Section: Resultsmentioning

confidence: 71%

“…Sulfentrazone is recommended mainly to apply preemergence, hence it is important to consider its adsorption onto soil particles and its bioavailability in soil solution. There is evidence that clay soils with a high content of organic matter and low pH tend to reduce herbicide phytotoxicity owing to increased adsorption to soil particles and lower herbicide availability, while soils containing low levels of organic matter and with high pH enhance phytotoxicity (Grey et al, 2000;Szmigielski et al, 2009Szmigielski et al, , 2012. The Brazilian Cerrado soils generally contain high levels of organic matter (3.2 dag kg -1 soil in the present study) and exhibit pH values below 6.56 [the pKa of sulfentrazone (Rodrigues & Almeida, 2018)].…”

Section: Resultsmentioning

confidence: 99%

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Tolerance of cowpea cultivars to pre-emergence application of sulfentrazone

et al. 2021

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Improved methods of weed control are required to support expansion of large-scale cowpea cultivation in mid-west Brazil. With the aim of testing our hypothesis that the tolerance of cowpea cultivars to sulfentrazone is dose-and genotype-dependent, we assessed the effects of increasing doses (0, 250, 500 and 1,000 g ha-1 of sulfentrazone) on the cultivars BRS Imponente, BRS Novaera, BRS Tumucumaque and BRS Itaim. The phytotoxic effects of sulfentrazone varied according to the dose of herbicide applied, although the symptoms were mild and only observable at the initial stages of development and at the highest dose tested. No statistically significant interactions were detected between cultivars and doses, and there were no significant differences between doses regarding population density, plant height, yield components and grain yield. Our results demonstrate that sulfentrazone is highly selective and can be applied to the studied cultivars without affecting growth or yield.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Tolerance of cowpea cultivars to pre-emergence application of sulfentrazone

et al. 2021

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“…O sulfentrazone, também inibidor de PPO, pertence ao grupo químico das Triazolinonas, sendo que sua persistência no solo é em torno de 21 a 113 dias, ou seja, longa atividade residual no solo (Szmigielski et al, 2012). Segundo Vivian et al (2006), o ingrediente é pouco lixiviável e alcança profundidades de 0-0,10 m, em que a camada de palha pode influenciar neste processo.…”

Section: Resultsunclassified

Herbicidas pré-emergentes para manejo de milho voluntário RR® na cultura da soja

Scherer

Spatt²,

Pedrollo³

et al. 2017

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Resumo - Abstract -Alternatives for volunteer corn RR® management need further knowledge in the product scope with residual effect, mainly for use in pre-emergence of the soybean RR ® . This paper evaluated the performance of residual herbicides to control this species, when applied in soybean using the method "plant-apply". The experiment was carried in the municipality of Santa Maria/RS, crop season 2015/16; evaluating herbicides applied in pre-emergence of soybean crop and corn RR ® . The experimental design was randomized blocks with eight treatments and four replications were evaluated inhibition of emergence of corn plants and injury on emerged plants. Sequential application responses were also addressed. Herbicides tested: flumioxazin, chlorimuron-ethyl, imazaquin, and sulfentrazone; as associations these herbicides with flumioxazin, in sequential applications, reporting if there were synergistic effects. The best control of RR ® volunteer corn was obtained with the imazaquin herbicide, which reduced the emergence of RR ® corn plants by 90% and injured 97.5% of those that emerged. However, imazaquin caused symptoms of 1 Recebido para publicação em

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“…Once in the soil, sulfentrazone presents mobility and high persistence (half-life of 121 to 302 days under field conditions), with low sorption capacity (Kd < 1.0 mL g -1 and Koc of 43 mL g -1 ) (Shaner, 2014); thus, it presents high risk of contamination of underground waters, and is classified as highly leachable according to the GUS index (6.16) (PPDB, 2018). The mobility of this herbicide is related to the soil pH and organic matter content, although the clay fraction may also affect it (Ohmes and Muller, 2007;Szmigielski et al, 2012).…”

Section: Introductionmentioning

confidence: 99%