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Effect of Wetting/Drying Cycles on Dissipation Patterns of Bioavailable Imazaquin

Published online by Cambridge University Press:  12 June 2017

Todd A. Baughman  and
David R. Shaw
Todd A. Baughman
Affiliation:
Dep. Plant & Soil Sci., Miss. State Univ., Mississippi State, MS 39762
David R. Shaw
Affiliation:
Dep. Plant & Soil Sci., Miss. State Univ., Mississippi State, MS 39762
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Abstract

Greenhouse experiments determined differences in imazaquin bioavailability over time under various soil moisture regimes. All soils were initially fortified with 63 ppb (w/w) of commercially formulated imazaquin. Treatments consisted of maintaining at field capacity for 15 wk (FC), maintaining air-dry for 15 wk (AD), soil that was maintained air-dry for 2 wk and then wet to field capacity at 2 wk intervals (2WAD), and soil that was wet to field capacity at the initiation of the experiment and at 2 wk intervals (2WFC). Little dissipation of imazaquin occurred in the AD soil over the 100 d of this study. Rapid dissipation over the first 35 d occurred for the other three treatments. Imazaquin half-life ranged from 17 to 18 d for the FC, 2WAD, and 2WFC soils. Imazaquin concentration increased or only slightly decreased in samples taken after the second watering in both the 2WAD and the 2WFC soils. Due to differences in adsorption/desorption of imazaquin with changing soil moisture levels, bioassays may not determine the dissipation of the actual concentration of imazaquin contained in soil.

Keywords

Imazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidcorn Zea mays L. ‘HyPerformer HS 9773.’Bioavailabilitydissipationhalf-lifepersistencesoil bioassaysoil moisture
Type
Soil, Air, and Water
Information
Weed Science , Volume 44 , Issue 2 , June 1996 , pp. 380 - 382
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

Literature Cited

1. Basham, G. W. and Lavy, T. L. 1987. Microbial and photolytic dissipation of imazaquin in soil. Weed Sci. 35: 865–870.Google Scholar
2. Basham, G., Lavy, T. L., Oliver, L. R., and Scott, H. D. 1987. Imazaquin persistence and mobility in three Arkansas soils. Weed Sci. 35: 576–582.CrossRefGoogle Scholar
3. Barnes, C. J., Goetz, A. J., and Lavy, T. L. 1989. Effects of imazaquin on cotton (Gossypium hirsutum). Weed Sci. 37: 820–824.CrossRefGoogle Scholar
4. Curran, W. S., Liebl, R. A., and Simmons, F. W. 1992. Effects of tillage and application method on clomazone, imazaquin, and imazethapyr persistence. Weed Sci. 40: 482–489.CrossRefGoogle Scholar
5. Curran, W. S., Loux, M. M., Liebl, R. A., and Simmons, F. W. 1992. Photolysis of imidazolinone herbicides in aqueous solution and on soil. Weed Sci. 40: 143–148.CrossRefGoogle Scholar
6. Gan, J., Weimer, M. R., Koskinen, W. C., Buhler, D. D., Wyse, D. L., and Becker, R. L. 1994. Sorption and desorption of imazethapyr and 5-hydroxyimazethapyr in Minnesota soils. Weed Sci. 42: 92–97.Google Scholar
7. Goetz, A. J., Wehtje, G., Walker, R. H., and Hajek, B. 1986. Soil solution and mobility characteristics of imazaquin. Weed Sci. 34: 788–793.Google Scholar
8. Loux, M. M., Liebl, R. A., and Slife, F. W. 1989. Availability and persistence of imazaquin, imazethapyr, and clomazone in soil. Weed Sci. 37: 259–267.Google Scholar
9. Loux, M. M., Liebl, R. A., and Slife, F. W. 1989. Adsorption of imazaquin and imazethapyr on soils, sediments, and selected absorbents. Weed Sci. 37: 712–718.Google Scholar
10. Loux, M. M. and Reese, K. D. 1992. Effect of soil pH on adsorption and persistence of imazaquin. Weed Sci. 40: 490–496.Google Scholar
11. Mills, J. A. and Witt, W. W. 1989. Efficacy, phytotoxicity, and persistence of imazaquin, imazethapyr, and clomazone in no-till double-crop soybean (Glycine max). Weed Sci. 37: 353–359.Google Scholar
12. Mills, J. A. and Witt, W. W. 1991. Dissipation of imazaquin and imazethapyr under conventional and no-tillage soybean (Glycine max). Weed Technol. 5: 586–591.Google Scholar
13. Monks, C. D. and Banks, P. A. 1993. Effect of straw, ash, and tillage on dissipation of imazaquin and imazethapyr. Weed Sci. 41: 133–137.CrossRefGoogle Scholar
14. Neter, J., Wasserman, W. W., and Kutner, M. H. 1990. Qualitative independent variables. Pages 349–385 in Applied Linear Statistical Models. 3rd ed. Richard D. Irwin, Inc., Homewood, IL.Google Scholar
15. Renner, K. A., Meggitt, W. F., and Leavitt, R. A. 1988. Influence of rate, method of application, and tillage on imazaquin persistence in soil. Weed Sci. 36: 90–95.Google Scholar
16. Renner, K. A., Meggitt, W. F., and Penner, D. 1988. Effect of soil pH on imazaquin and imazethapyr adsorption to soil and phytotoxicity to corn (Zea mays). Weed Sci. 36: 78–83.CrossRefGoogle Scholar
17. Schroeder, J. 1993. Imazaquin persistence in southern soils under controlled conditions. Proc. South. Weed Sci. Soc. 46: 346.Google Scholar
18. Smith, C. A. 1990. Runoff and persistence of soil-applied alachlor and imazaquin. , Miss. State Univ., Mississippi State, MS. 54 pp.Google Scholar
19. Stougaard, R. N., Shea, P. J., and Martin, A. R. 1990. Effect of soil type and pH on adsorption, mobility, and efficacy of imazaquin and imazethapyr. Weed Sci. 38: 67–73.Google Scholar
20. Vencill, W. K., Schroeder, J., and Shaw, D. R. 1994. Dissipation of chlorimuron and imazaquin as reported from multi-state field and laboratory studies. Proc. South. Weed Sci. Soc. 47: 194.Google Scholar
21. Wichert, R. A. and Talbert, R. E. 1991. Adsorption characteristics of imazaquin in southern soils. Proc. South. Weed Sci. Soc. 47: 415.Google Scholar