Adsorption and Desorption of Picloram, Trifluralin, and Paraquat by Ionic and Nonionic Exchange Resins

McCall, H. G.; Bovey, R. W.; McCully, M. G.; Merkle, M. G.

doi:10.1017/s0043174500035530

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…A number of workers have studied the effect of various soil constituents on the bioactivity of trifluralin (2, 5, 12) and triallate and diallate (1). Some data are also available on the extent of adsorption of these three herbicides, both on soils (16) or on other related surfaces (3,15). However, no integrated approach has been carried out to correlate adsorption data of these herbicides with desorption potential or herbicide availability.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Desorption of Trifluralin, Triallate, and Diallate by Various Adsorbents

Grover

1974

Weed sci.

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The relative adsorption of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), triallate [S-(2,3,3-trichloroallyl)-diisopropylthiocarbamate], and diallate [S-(2,3-dichloroallyl)diisopropylthiocarbamate] was studied on several adsorptive surfaces. The herbicides were strongly adsorbed, with the following general trend: activated charcoal > peat moss > wheat straw (Triticum aestivumL.) ∼ cellulose triacetate > cation exchange resin > anion exchange resin > silica gel ∼ cellulose powder > kaolinite ∼ montmorillonite. Trifluralin and triallate were readily desorbed from montmorillonite by water, with miniminal desorption for peat moss, cellulose triacetate, and wheat straw.

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Section: Introductionmentioning

confidence: 99%

Adsorption and Desorption of Trifluralin, Triallate, and Diallate by Various Adsorbents

Grover

1974

Weed sci.

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“…Various researchers (2,9,12,16,20,23,26) have studied adsorption of trifluralin, but few adsorption data are available for other dinitroaniline herbicides (6,16,26). Similarly, the diffusion of trifluralin has been studied (3,4,26), but diffusion of most of the other dinitroaniline herbicides has not been thoroughly examined (26).…”

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confidence: 99%

Adsorption and Diffusion of Dinitroaniline Herbicides in Soils

Jacques

Harvey

1979

Weed sci.

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Adsorption of benefin (N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine), dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine), fluchloralin [N-(2-chloroethyl)-2,6-dinitro-N-propyl-4-(trifluoromethyl)aniline], oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide), profluralin [N-(cyclopropylmethyl)-α,α,α-tri-fluoro-2,6-dinitro-N-propyl-p-toluidine], and trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) was studied in 10 Wisconsin soils. Ratios of the quantity of each herbicide adsorbed and quantities remaining in the soil solution at equilibrium (Kd value) on a Piano silt loam (Typic Argiudoll fine-silty, mixed, mesic) remained relatively constant over a range of concentrations. Herbicide adsorption by the soils was related more closely to soil organic matter than to the other soil chemical and physical properties. Diffusion of the herbicides in Piano silt loam was affected by soil water. Diffusion of trifluralin, profluralin and benefin decreased as soil water increased. Diffusion of dinitramine and fluchloralin did not change significantly with change in water content. Diffusion of oryzalin increased at the highest soil water content. None of the herbicides moved more than 10 mm in the soil during a 17-day period. In unsaturated Piano silt loam, relative mobility of the herbicides was trifluralin ≥benefin>profluralin>fluchloralin>dinitramine≥oryzalin. Oryzalin reached highest mobility in water-saturated soil.

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“…It has been reported that the inherent phytotoxicity of trifluralin was not significantly altered by pH between 5-5 and 7 4 (Hollist & Foy, 1971). McCall et al (1972), investigating the sorption of herbicides on exchange resins, found that trifluralin was adsorbed mainly by nonionic resins, confirming its neutral characteristics. Likewise, increasing the pH of soils from 4-3 to 7-5, had no effect on the activity of nitralin.…”

Section: Discussionmentioning

confidence: 80%

Behaviour and persistence of trifluralin in soil

1974

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Summary: Résumé: Zusammenfassung The growth response of sorghum to trifluralin, on various soils and soil mixtures, was significantly correlated with organic matter (ranging from <0–1% to 20–4%) but not with clay content (ranging from 3% to 63%). However, in soils with a similar, low organic matter content, the activity of trifluralin increased with increasing clay content. No correlation was found between phytotoxicity of trifluralin and lime content of soils. The persistence of trifluralin incorporated in soil was examined by repeated reseedings of sorghum. Phytotoxicity lasted longer in soil dried and mixed at each interval between seedings than in soil left undisturbed; after 2 months about 50% of the original 4 ppm trifluralin remained in undisturbed soil vs 60 % in repeatedly mixed soil. The rate of degradation, after 2 months of incubation at 50% field capacity, increased with temperatures from 10°to40° the concentration of trifluralin required for a given growth reduction was approximately eight times greater after incubation at 40° than at 10°C. Comportement et persistattce de la trifluraline dans le sol Les effets de Ia trifluraline sur la croissance du sorgho cultivé dans divers sols ou mélanges de sol se sont révlés être en corrélation significative avec la matiere organique (entre < 0,1 % et 20,4 %) mais pas avec la teneur en argile (de 3 % A 63 %). Toutefois dans les sols contenant un taux analogue et faible de matiére organique, l'activité de la trifluraline s'est accrue en même temps que Ia leneur en argile. Aucune corrélation n'a été constatée entre la phytotoxicité de la trifluraline et la teneur en calcaire des sols. La persistance de la trifluraline incorporée dans le sol a été examinée au moyen de ressemis répétés de sorgho. La phytotoxicité dura plus longtemps dans le sol séché et remuéà chaque intervalle entre les semis que dans le sol non travaillé; au bout de 2 mois, 50% environ des 4 ppm de trifluraline apportés à. I'origine restaient dans le sol non remué contre 60% dans le sol plusieurs fois remué. Le taux de degradation, aprés deux mois d'inciibation à 50% de la capacityé au champ, augmenta avec la température de 10°à 40°C; la concentration de trifturaline nécessaire pour obtenir une réduction de croissance donnée fut approximativement huit fois plus grande aprés incubation. à 40° qu'aprés incubation à 10°C. Verhalten und Perststenz von Trifluralin im Boden Die Wachstumsreaktion von Hirse gegenubcr Trifluralin in verschiedenen Böden und Bodenmischungen war signifikant mit dem Gehalt an organischer Substanz (<0–1 %–20–4%) korreliert, nicht aber mit dem Tongehalt (von 3%‐63%). Jedoch nahm in Böden mit annähernd gleich niedrigen Gehalten an organischer Substanz die Wirksamkeit von Trifluralin mit steigendeni Tongehalt zu. Zwischen der Phytotoxizität von Trifluralin und dem Kalkgehalt der Böden wurde keine Korrelation gefunden. Die Persistenz von in den Boden eingearbeitetem Trifluralin wurde durch wiederholte Einsaat von Hirse untersucht. Die Phytotoxizität dauerte im Boden, der jeweil...

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Adsorption and Desorption of Picloram, Trifluralin, and Paraquat by Ionic and Nonionic Exchange Resins

Cited by 14 publications

References 21 publications

Adsorption and Desorption of Trifluralin, Triallate, and Diallate by Various Adsorbents

Adsorption and Desorption of Trifluralin, Triallate, and Diallate by Various Adsorbents

Adsorption and Diffusion of Dinitroaniline Herbicides in Soils

Behaviour and persistence of trifluralin in soil

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