Environmental fate of S-Metolachlor: a review

Zemolin, C.R.; Avila, Luis Antônio de; Cassol, G.V.; Massey, J.H.; Camargo, Edinalvo Rabaioli

doi:10.1590/s0100-83582014000300022

Cited by 46 publications

(34 citation statements)

References 63 publications

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“…The use of residual herbicides improves weed control during early crop growth and is an alternative for controlling herbicide-resistant weeds (Zemolin et al 2014). However, the presence of plant cover on the soil at the application time causes changes that affect the dynamics of residual herbicides (Cassigneul et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Leaching of the S-metolachlor herbicide associated with paraquat or glyphosate in a no-tillage system

Nunes

Vidal

2016

Pesqui. Agropecu. Trop.

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The combined use of desiccant and residual herbicides is a common management practice under no-tillage systems. However, the effect of desiccant herbicides and mulch on the leaching of residual herbicide is unknown. This study aimed at assessing the leaching of the S-metolachlor herbicide applied to ryegrass sequentially or in association with paraquat or glyphosate. A randomized blocks design was used, with four repetitions and treatments distributed over split-plots. The desiccant herbicides paraquat (600 g ha-1) or glyphosate (720 g ha-1) were used in the main plot, while S-metolachlor (2,800 g ha-1) was applied sequentially or in association with the desiccant herbicides in the subplots. There was also a control containing only desiccant herbicide, with no application of residual herbicide. The type of desiccant did not affect the leaching of the residual herbicide. In addition, the chosen method to apply the residual herbicide, sequentially or in association with the desiccant, did not impact the S-metolachlor behavior in the soil. The bioavailable concentration in the soil, 25 days after the application, was 90 g a.i. ha-1, at a depth of 18 cm.

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Section: Introductionmentioning

confidence: 99%

Leaching of the S-metolachlor herbicide associated with paraquat or glyphosate in a no-tillage system

Nunes

Vidal

2016

Pesqui. Agropecu. Trop.

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“…Sorghum, as well as sugar beet plants, can absorb a lesser amount of the herbicide due to more significant development of the hypocotyl tissues (ZEMOLIN et al, 2014) and S-metolachlor applications on sorghum plants in stage V2 can increase the tolerance of these species to the herbicide. Additionally, the sorghum plants can degrade the herbicide via oxidation or the glutathione-S-transferase (GST) (SLABA et al, 2015), reducing the toxicity of these plants at 28 DAA.…”

Section: Resultsmentioning

confidence: 99%

Effects of weed management and plant arrangements on yield index of sweet sorghum

et al. 2019

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Sweet sorghum is currently an important alternative for ethanol production in sugar cane off-season. In this study was to evaluate the effects of plant arrangements and the application of atrazine and Smetolachlor on growth and productivity of sweet sorghum. An experiment was conducted in randomized block design and, arranged in split plots with four repetitions. Plots consisted of spacing (0.25 m, 0.45 m 0.45-0.45-0.90 m) and sub-plots of weed control methods -atrazine (2000 g ha -1 ), atrazine + S-metolachlor (2000 + 720 g ha -1 ), atrazine + S-metolachlor (2000 + 960 g ha -1 ), atrazine + S-metolachlor (2000 + 1200 g ha -1 ), atrazine + Smetolachlor (2000 + 1440 g ha -1 ). Besides that, manual hoeing control was added. The intoxication of sorghum plants and weed control was evaluated at 7, 14 e 28 days after herbicides application (DAA). Plant height, stem diameter, total fresh matter, juice mass and total soluble solids (°Brix) were evaluated at 120 days after crop emergence (DAE). There was no interaction between the factors spacings and control method for variables total matter fresh (TMF), height (H), stem diameter (D), juice mass (JM), and Brix. Application of the mixture (atrazine + S-metolachlor) in the highest doses reduced total fresh matter and °Brix. The spacing of 0.25 m provided the highest productivity of fresh matter, juice mass and increased the °Brix. The application of mixture (atrazine + S-metolachlor) controlled 90% of the weeds at 28 days after application. The increasing in doses of S-metolachlor elevates the intoxication in sorghum plants. The mixture (atrazine + S-metolachlor) has a potential for use in weed control in sweet sorghum, but at doses below 960 g ha -1 of S-metolachlor.

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“…The lowest dose of S-metolachlor (1,200 g ha -1 ) did not affect any of the measured variables and, consequently, did not affect sunflower productivity (Tables 4 and 5 The highest dose of S-metolachlor (2,400 g ha -1 ) caused reductions in sunflower crop yield (Tables 4 and 5). The adsorption of S-metolachlor in soils is positively correlated with organic matter and clay content (Gannon et al, 2013;Zemolin et al, 2014). Thus, when S-metolachlor is applied in preemergence conditions, this herbicide is positioned on the soil surface, which is the site of higher concentrations of organic matter (Bedmar et al, 1996;Alletto et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Bidens pilosa L. (Asteraceae) control in sunflower with residual herbicides

Brighenti

2019

Com. Sci.

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One of the most damaging species in sunflower crops in Brazil is the hairy beggartick (Bidens pilosa L). The large number of seeds, the various vegetative cycles during the year, the staggered germination and the scarcity of selective and effective herbicides to control this weed in sunflower are some of attributes that hinder the control of hairy beggartick populations. Two experiments were carried out to evaluate the control of hairy beggarticks, as well as sunflower tolerance to herbicides. The treatments were as follows: S-metolachlor (1,200 and 2,400 g ai ha-1), flumioxazin (60 and 120 g ai ha-1), and sulfentrazone (150 and 300 g ai ha-1) and two controls (weedy and weed-free check). The selectivity of the herbicides was higher at low doses. Flumioxazin and sulfentrazone caused injury to sunflowers at the highest doses and mainly in sandy soils. Although S-metolachlor did not cause visual symptoms of injury, the higher dose reduced sunflower yield. The herbicides sulfentrazone and flumioxazin provided satisfactory control of hairy beggartick plants in both types of soils. S-metolachlor presented medium control of hairy beggarticks in clay soil; however, its efficiency was slightly higher when applied in sandy soil. The most efficient herbicide for controlling hairy beggartick plants was flumioxazin, followed by sulfentrazone.

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Environmental fate of S-Metolachlor: a review

Cited by 46 publications

References 63 publications

Leaching of the S-metolachlor herbicide associated with paraquat or glyphosate in a no-tillage system

Leaching of the S-metolachlor herbicide associated with paraquat or glyphosate in a no-tillage system

Effects of weed management and plant arrangements on yield index of sweet sorghum

Bidens pilosa L. (Asteraceae) control in sunflower with residual herbicides

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