Imidazolinone Degradation in Soil in Response to Application History

Bundt, A.C.; Avila, Luis Antônio de; Pivetta, A.P.; Agostinetto, Dirceu; Dick, Deborah Pinheiro; Burauel, Peter

doi:10.1590/0100-83582015000200020

Cited by 20 publications

(8 citation statements)

References 30 publications

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“…The differences in dissipation rate between the first application and the second one were insignificant for both enantiomers ( Figure S3). The insignificant effect of repeated applications on imazaquin dissipation observed in this study agrees with the results reported by Bundt et al (2015). These authors conducted a non-enantioselective study on the dissipation of five imidazolinone herbicides in soils with a two-year application history and concluded that the prior application of imidazolinones did not stimulate microbial degradation of herbicides from the same chemical group.…”

Section: Dissipation In Unamended Soilssupporting

confidence: 91%

Behavior of the enantiomers of the herbicide imazaquin in agricultural soils under different application regimes

et al. 2017

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Sorption, persistence, and leaching of the enantiomers of the herbicide imazaquin, S-imazaquin and R-imazaquin, in two soils under different application regimes were studied. Imazaquin dissipation was evaluated after a single application of the racemic herbicide and the pure enantiomers, and after a repeated application of the racemic herbicide. The effects of adding two olive-mill wastes (ALP and ALPc), biochar (BC), and organoclay (SA-HDTMA) on sorption, dissipation, and leaching of imazaquin enantiomers applied as racemic herbicide to the soils was also evaluated. For all treatments, sorption, dissipation, and leaching of imazaquin in the soils were either non-enantioselective or scarcely enantioselective. No interconversion of Rimazaquin to S-imazaquin or vice-versa was observed in the experiments with the pure isomers. Addition of ALP, ALPc, or BC did not enhance the negligible sorption of imazaquin enantiomers by the soils, but accelerated their dissipation. Addition of SA-HDTMA increased sorption of both enantiomers and delayed their dissipation and leaching. The results illustrate how agricultural practices can impact the behavior of imazaquin enantiomers in soils and support the suitability of replacing currently used racemic formulations of imazaquin with formulations based on the single biologically-active (R) enantiomer to reduce the environmental impact of this chiral pesticide.

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Section: Dissipation In Unamended Soilssupporting

confidence: 91%

Behavior of the enantiomers of the herbicide imazaquin in agricultural soils under different application regimes

et al. 2017

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“…The proliferation of microorganisms was directly affected by soil moisture [15]. A high soil moisture, with high levels of microbial activity, would stimulate the microbial degradation of imazapic [22,27,28]. Moreover, pesticide adsorption in soil was greater at a low moisture content [29].…”

Section: Resultsmentioning

confidence: 99%

Adsorption and degradation of imazapic in soils under different environmental conditions

Hao

Ding

et al. 2019

PLoS ONE

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Imazapic is widely used in peanut production, and its residues can cause damage to succeeding crops planted in the following year. The planting area of peanut is large in Henan province. Inceptisol is the main soil type in Henan Province and was used in laboratory experiments that were conducted to investigate imazapic degradation in soil under various environmental conditions. The results indicated that the imazapic degradation rate increased with an increase in temperature, soil pH, and soil moisture, and decreased with organic matter content. The use of biogas slurry as a soil amendment accelerated imazapic degradation. The half-life of imazapic in sterilized soil (364.7 d) was longer than in unsterilized soil (138.6 d), which suggested that there was a significant microbial contribution to imazapic degradation. Imazapic adsorption was also examined and was found to be well described by the Freundlich isotherm. The results indicate that soil has a certain adsorption capacity for imazapic.

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“…Herbicides from the imidazolinone group are effective to control a wide spectrum of weeds; they are used in commercial mixtures, such as imazapyr+imazapic to control red rice, cultivated with the Clearfield ® system. However, the presence of these herbicides in the soil may cause problems to non-tolerant cultures cultivated in succession or rotation (Bundt et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Morphological and Metabolic Changes in Soybean Plants Cultivated in Irrigated Rice Rotation and as Affected by Imazapyr and Imazapic Herbicides Carryover

et al. 2019

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The appearance of soybean cultivars that are tolerant to herbicides from the imidazolinone group enables irrigated rice rotation conducted on Clearfield® system. The objective of this work was to evaluate the morphological and metabolic changes of soybean cultivars containing Cultivance® (CV), which is tolerant to imidazolinone, sulphonylurea toletant (STS) and Roundup Ready® (RR), which is tolerant to glyphosate as affected by carryover of increasing doses of imazapyr and imazapic herbicides mixture, applied in the management of irrigated rice crop. Thus, experiments were conducted on the field and in greenhouse, evaluating phytotoxicity, height, leaf area, shoot dry matter, as well as variables related to the secondary metabolism of plants like chlorophyll, carotenoids, hydrogen peroxide, lipid peroxidation and electrolytes leakage. Soybean cultivars RR and STS are susceptibles to the carryover of imazapyr and imazapic mixture applied in the management of irrigated rice crop, whereas the CV cultivar is resistant. The rise in the herbicide carryover dose increases the reactive oxygen species (ROS) production in soybean plants. The RR cultivar, in general, shows higher ROS production compared to the other soybean cultivars.

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Imidazolinone Degradation in Soil in Response to Application History

Cited by 20 publications

References 30 publications

Behavior of the enantiomers of the herbicide imazaquin in agricultural soils under different application regimes

Behavior of the enantiomers of the herbicide imazaquin in agricultural soils under different application regimes

Adsorption and degradation of imazapic in soils under different environmental conditions

Morphological and Metabolic Changes in Soybean Plants Cultivated in Irrigated Rice Rotation and as Affected by Imazapyr and Imazapic Herbicides Carryover

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