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Trifluralin Interactions with Soil Constituents

  • R. L. Hollist (a1) and C. L. Foy (a1)

Abstract

Concentrations of α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) causing 50% growth reduction (hereinafter referred to as GR50) were determined in nutrient culture and 64 simulated soils using foxtail millet (Setaria italica (L.) Beau.) as an indicator species. The relative order of effectiveness of soil components in reducing trifluralin phytotoxicity was steamed organic matter ≫ organic matter ≫ steamed montomorillonite ≥ steamed kaolinite ≃ kaolinite ≃ montmorillonite. Steaming the organic matter more than doubled the anion exchange capacity. Anion exchange capacity was a better parameter than cation exchange capacity for assessing the potential of an adsorbent to reduce phytotoxicity. Surface area, cation exchange capacity, and adsorption of trifluralin from solution were less reliable indices. The effectiveness of organic matter in reducing phytotoxicity may be due to the exchange capacity and high surface area. Montomorillonite apparently interacted synergistically with other adsorbents to reduce phytotoxicity. Trifluralin did not adsorb on the internal surfaces of montmorillonite as judged by surface area comparisons and X-ray diffraction determinations. Increasing moisture content appeared to block the active sites of trifluralin adsorption. This may be concluded from greater vapor movement and decreased adsorption from a xylene solvent system for moist compared to air dry soils.

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1. Anderson, W. P., Richards, A. B., and Whitworth, J. W. 1968. Leaching of trifluralin, benefin, and nitralin in soil columns. Weed Sci. 16:165169.
2. Ashton, F. M. 1961. Movement of herbicides in soil with simulated furrow irrigation. Weeds 9:612619.
3. Blouch, R. and Fults, J. 1953. The influence of soil type on the selective action of chloro-IPC and sodium-TCA. Weeds 2:119124.
4. Bouyoucos, G. J. 1962. Hydrometer method improved for making particle size analyses of soils. Agron. J. 54:464465.
5. Brunauer, S., Emmett, P. H., and Teller, E. 1938. Adsorption of gases in multimolecular layers. J. Amer. Chem. Soc. 60:309319.
6. Dewey, O. R. 1960. Further experimental evidence on the fate of simazine in the soil. Proc. Brit. Weed Contr. Conf. 5:9197.
7. Donaldson, T. W. and Foy, C. L. 1965. The phytotoxicity and persistence in soils of benzoic acid herbicides. Weeds 13: 195202.
8. Helling, C. S. and Turner, B. C. 1968. Pesticide mobility: determination by soil thin-layer chromatography. Science 162:562563.
9. Hoagland, D. R. and Arnon, D. I. 1950. The water culture method for growing plants without soil. Calif. Agr. Exp. Sta. Circ. 347. 32 p.
10. Klute, A. 1965. Water capacity, p. 273278. In Black, C. A., Methods of soil analyses, (ed.) Amer. Soc. of Agron. and Amer. Soc. for Testing and Materials, Madison, Wisconsin.
11. Hull, H. M., Barrier, G. E., Frans, R. E., Hilton, J. L., Knake, E. L., Moreland, D. E., and Zick, W. H. 1967. Herbicide Handbook of the Weed Society of America. W. F. Humphrey Press Inc., Geneva, N. Y. 293 p.
12. Morin, R. E. and Jacobs, H. S. 1964. Surface area determination of soils by adsorption of ethylene glycol vapor. Soil Sci. Soc. Amer. Proc. 28:190194.
13. Pinck, L. A., Holton, W. F., and Allison, F. E. 1961. Antibiotics in soils: 1. Physico-chemical studies of antibiotic-clay complexes. Soil Sci. 91:2228.
14. Sheets, T. J., Crafts, A. S., and Drever, H. R. 1962. Influence of soil properties on the phytotoxicities of the s-triazine herbicides. J. Agr. Food Chem. 10:458462.
15. Upchurch, R. P. and Mason, D. D. 1962. The influence of soil organic matter on the phytotoxicity of herbicides. Weeds 10:914.
16. Weber, J. B. and Scott, D. C. 1966. Availability of a cationic herbicide adsorbed on clay minerals to cucumber seedlings. Science 152:14001402.
17. Wiese, A. F. and Dunham, R. S. 1954. Preplanting applications of IPC and CIPC for selective control of wild oats (Avena fatua). Weeds 4:321330.

Trifluralin Interactions with Soil Constituents

  • R. L. Hollist (a1) and C. L. Foy (a1)

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