Behavior of pre-mix formulation of imazethapyr and imazamox herbicides in two different soils

Rani, D. Devika; Duhan, Anil; Punia, S. S.; Yadav, Dharam Bir; Duhan, Saroj

doi:10.1007/s10661-018-7161-x

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…The more herbicide is adsorbed to soil, the more likely it is to persist, because less of the herbicide is in soil solution to be taken up by plants, leached, or degraded (Anderson 1983). Generally, greater clay content and CEC increase the amount of herbicide bound to soil particles and decrease herbicide loss to volatilization and other mechanisms (Braschi et al 2011;Loux and Reese 1993;Ranie et al 2018). For example, pyroxasulfone's half-life ranged from 104 to 134 d in finer-textured clay loam soils, compared with 46 to 48 d in a sandy loam soil in Colorado (Westra et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Herbicide carryover to various fall-planted cover crop species

et al. 2019

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Residual herbicides applied to summer cash crops have the potential to injure subsequent winter annual cover crops, yet little information is available to guide growers’ choices. Field studies were conducted in 2016 and 2017 in Blacksburg and Suffolk, Virginia, to determine carryover of 30 herbicides commonly used in corn, soybean, or cotton on wheat, barley, cereal rye, oats, annual ryegrass, forage radish, Austrian winter pea, crimson clover, hairy vetch, and rapeseed cover crops. Herbicides were applied to bare ground either 14 wk before cover crop planting for a PRE timing or 10 wk for a POST timing. Visible injury was recorded 3 and 6 wk after planting (WAP), and cover crop biomass was collected 6 WAP. There were no differences observed in cover crop biomass among herbicide treatments, despite visible injury that suggested some residual herbicides have the potential to effect cover crop establishment. Visible injury on grass cover crop species did not exceed 20% from any herbicide. Fomesafen resulted in the greatest injury recorded on forage radish, with greater than 50% injury in 1 site-year. Trifloxysulfuron and atrazine resulted in greater than 20% visible injury on forage radish. Trifloxysulfuron resulted in the greatest injury (30%) observed on crimson clover in 1 site-year. Prosulfuron and isoxaflutole significantly injured rapeseed (17% to 21%). Results indicate that commonly used residual herbicides applied in the previous cash crop growing season result in little injury on grass cover crop species, and only a few residual herbicides could potentially affect the establishment of a forage radish, crimson clover, or rapeseed cover crop.

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Section: Introductionmentioning

confidence: 99%

Herbicide carryover to various fall-planted cover crop species

et al. 2019

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“…According to previous studies, imazethapyr hardly moves downward in the soil, even under conditions that favor leaching [9][10][11], with residues remaining in a layer of 10-20 cm in most soils [12,13] and being evenly distributed in the upper 15 cm [14,15]. Imazethapyr is strongly adsorbed to soil colloids at a low pH [16], and adsorption is positively correlated with organic matter content, clay content, and cation exchange capacity (CEC) [17][18][19][20][21][22][23][24][25][26][27][28]. Desorption hysteresis is more pronounced in higher pH soils [26,29,30].…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of Selected Crops to Simulated Imazethapyr Carryover: A Morpho-Anatomical Analysis

Jovanović-Radovanov

Rančić

2023

Agronomy

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A bioassay study was conducted to determine the differences in the susceptibility of selected crops to simulated imazethapyr residues based on morphological and anatomical parameters. Sugar beet, white mustard, and rapeseed oil were found to be the most sensitive based on ED50 values for the root length and the root fresh weight. Corn and sunflower were less sensitive, and wheat was the least sensitive. The measured anatomical parameters confirmed the different sensitivities of the tested plants, as evidenced by a shortening of the meristem and elongation zones, a reduction in the distance between the root tip and the absorption zone, and the distance between the root tip and the point where the primordium of the lateral root appears. Animazethapyr residue level equivalent to ED20 (for root length) did not cause serious morphological changes in the less sensitive plants, nor did it cause significant changes in the length of the root cap, the beginning of the root absorption zone (root hair region), the beginning of lateral root formation (i.e., the permanent region), and the number of root primordia per root length. Therefore, ED20 could be proposed as an acceptable residue level (ARL) or herbicide residue level at which these plants can be safely sown.

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