Effect of trifluralin soil metabolites on cotton boll components and fiber and seed properties

Koskinen, William C.; Leffler, H. R.; Oliver, James E.; Kearney, Philip C.; McWhorter, C. G.

doi:10.1021/jf00065a045

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…If we had observed a substantial, consistent effect on the plants, we would then have determined if the effect was due directly to the metabolite applied to soil, a secondary metabolite resulting from degradation, or from synergism or antagonism. Our study, within the limitations of any nonfield study does not support the concept that the ac cumulation of trifluralin metabolites has contributed to any loss of soybean yield or quality, just as recent work (5,6) has shown that the metabolites do not affect cotton growth, yield, or quality.…”

Section: Resultscontrasting

confidence: 87%

Effect of Trifluralin Soil Metabolites on Soybean (Glycine max) Growth and Yield

Koskinen¹,

Oliver

McWhorter³

et al. 1986

Weed sci.

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The effects of twelve soil metabolites of trifluralin [2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine] on soybean [Glycine max(L.) Merr.] growth, yield, and seed oil and protein content were determined. The metabolites included oxidative dealkylated, reduced nitro group, benzimidazole, azoxy, azo, oxidized, and hydroxylated derivatives of trifluralin. When applied at 0.22 kg ai/ha and incorporated 7.5 cm deep, no individual metabolite had a significant adverse effect on growth or yield. Three of the metabolites significantly decreased seed oil content and two of the metabolites significantly increased seed protein content. These effects are not considered important in that the differences, while statistically significant, are very small. Also, the amounts of metabolites applied greatly exceeded those expected to be found after many years of continuous use of trifluralin. Potential accumulation of individual metabolites from long-term use of trifluralin does not appear to adversely affect soybean growth, yield, or quality.

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Section: Resultscontrasting

confidence: 87%

Effect of Trifluralin Soil Metabolites on Soybean (Glycine max) Growth and Yield

Koskinen¹,

Oliver

McWhorter³

et al. 1986

Weed sci.

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“…They should now be regarded as good candidates for future investigations of sorption, toxicology, and susceptibility to biodegradation. Although some research has been conducted on the toxicity of selected trifluralin degradation products ( − ), the fates and potential environmental impacts of TR-7, TR-8, TR-9, TR-14, and TR-16 remain largely unknown.…”

Section: Resultsmentioning

confidence: 99%

Abiotic Degradation of Trifluralin by Fe(II): Kinetics and Transformation Pathways

Klupinski

Chin

2003

Environ. Sci. Technol.

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The herbicide trifluralin (2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine) is widely used in agriculture and may pose toxic risks to some aquatic organisms. While its degradation has been investigated in field studies, this research is the first to elucidate the specific abiotic transformations that trifluralin may undergo in reducing environments such as flooded soils and wetland sediments. Kinetic data and product identities were determined for the degradation of trifluralin in Fe(II)/goethite suspensions at near-neutral pH values. Under these conditions, trifluralin is consumed rapidly through a surface-mediated process that includes three distinct reactions: reduction of nitro groups, dealkylation of propylamines, and cyclization to form benzimidazoles. All detected products are among those that have been reported in natural soils and sediments. Therefore, these transformation pathways may play a significant role in affecting the fate of trifluralin in the environment.

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“…Predicted yields decreased as depth at which root reduction occurred increased. Greenhouse experiments showed no significant effects on cotton growth, yield, or fiber quality due to 12 soil metabolites of trifluralin (6,7).…”

Section: Introductionmentioning

confidence: 94%

Response of Cotton (Gossypium hirsutum) to Repeated Applications of Dinitroaniline Herbicides

Keeling

Abernathy

1989

Weed technol.

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Dinitroaniline herbicides have been used on the Texas Southern High Plains since the mid-1960s. Over this same period, cotton yields in this region have declined in spite of improved varieties and technology. Repeated applications of trifluralin and pendimethalin, each applied at 1x and 2x rates, were incorporated in 1983 through 1988. Variations in cotton stands, yields, and fiber quality were high due to environmental conditions. After six repeated applications, no reductions in cotton growth or yield were observed, even at the highest rates.

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Effect of trifluralin soil metabolites on cotton boll components and fiber and seed properties

Cited by 8 publications

References 11 publications

Effect of Trifluralin Soil Metabolites on Soybean (Glycine max) Growth and Yield

Effect of Trifluralin Soil Metabolites on Soybean (Glycine max) Growth and Yield

Abiotic Degradation of Trifluralin by Fe(II): Kinetics and Transformation Pathways

Response of Cotton (Gossypium hirsutum) to Repeated Applications of Dinitroaniline Herbicides

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