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Dicamba Antagonizes Grass Weed Control with Imazethapyr by Reducing Foliar Absorption

  • Stephen E. Hart (a1) and Loyd M. Wax (a1)

Abstract

Greenhouse and laboratory studies were conducted to determine the effects of tank-mixing the sodium salt of dicamba (Na-dicamba) with imazethapyr on the efficacy and foliar absorption of imazethapyr, applied with non-ionic surfactant (NIS) or methylated seed oil (MSO), by shattercane, giant foxtail, and large crabgrass. The effects of various salt formulations of dicamba and the addition of ammonium sulfate on efficacy, 14C-absorption and on foliar spray retention by the same species were also evaluated. Na-dicamba antagonized imazethapyr efficacy by reducing 14C-absorption. Using MSO instead of NIS prevented antagonism when Na-dicamba was applied at 70 and 140 g/ha and reduced the severity of the antagonism at greater application rates by greatly increasing 14C-absorption compared to NIS. Reductions in 14C-absorption and spray retention were due to the salt formulations of dicamba rather than the parent acid. The addition of ammonium sulfate prevented dicamba antagonism of imazethapyr toxicity to grassy weeds by maintaining 14C foliar absorption and spray retention at normal levels.

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1. Arnold, F. J., Smith, W. A., and Taylor, F. R. 1994. Imazethapyr plus dicamba for weed control in imi-corn. Proc. North Cent. Weed Sci. Soc. 49:54.
2. Bader, B. M., DeFelice, M. S., Dilbeck, J. S., and Holman, C. S. 1994. Herbicide resistant weed populations discovered in Missouri. Proc. North Cent. Weed Sci. Soc. 49:89.
3. Barrentine, W. L., Soigner, S. S., and Kilen, T. C. 1995. Characterization of a common cocklebur (Xanthium strumarium L.) biotype resistant to the imidazolinone herbicides. Abstr. Weed Sci. Soc. Am. 35:45.
4. Bauer, T. A., Renner, K. A., and Penner, D. 1995. Response of selected weed species to postemergence imazethapyr and bentazon. Weed Technol. 9:236242.
5. Boldt, P. F. and Putnam, A. R. 1980. Selectivity mechanisms for foliar application of diclofop-methyl, I. Retention, absorption, and volatility. Weed Sci. 28:474477.
6. Buhler, D. D. and Proost, R. T. 1992. Influence of application time on bioactivity of imazethapyr in no-tillage soybean (Glycine max). Weed Sci. 40:122126.
7. Cantwell, J. R., Liebl, R. A., and Slife, F. W. 1989. Imazethapyr for weed control in soybean (Glycine max). Weed Technol. 3:596601.
8. Dobbels, A. F. and Kapusta, G. 1993. Postemergence weed control in corn (Zea mays) with nicosulfuron combinations. Weed Technol. 7:844850.
9. Flint, J. L. and Barrett, M. 1989. Antagonism of glyphosate toxicity to Johnsongrass (Sorghum halepense) by 2,4-D and dicamba. Weed Sci. 37:700705.
10. Gerwick, B. C. 1988. Potential mechanisms for bentazon antagonism with haloxyfop. Weed Sci. 36:286290.
11. Grichar, J. W. 1991. Sethoxydim and broadleaf herbicide interaction effects on annual grass control in peanuts (Arachis hypogaea). Weed Technol. 5:321324.
12. Hart, S. E., Kells, J. J., and Penner, D. 1992. Influence of adjuvants on the efficacy, absorption, and spray retention of primisulfuron. Weed Technol. 6:592598.
13. Hart, S. E. and Wax, L. M. 1994. Imazethapyr based weed control systems in imidazolinone resistant corn. Proc. North Cent. Weed Sci. Soc. 49:63.
14. Holshouser, D. L. and Coble, H. D. 1990. Compatibility of sethoxydim with five postemergence broadleaf herbicides. Weed Technol. 4:128133.
15. Horak, M. J. and Peterson, D. E. 1995. Biotypes of palmer amaranth (Amaranthus palmeri) and common waterhemp (Amaranthus rudis) are resistant to imazethapyr and thifensulfuron. Weed Technol. 9:192195.
16. Jordan, L. L., York, A. C., and Corbin, F. T. 1989. Effect of ammonium sulfate and bentazon on sethoxydim absorption. Weed Technol. 3:674677.
17. Los, M., Wepplo, P. J., Russell, R. K., Lences, B. L., and Orwick, P. L. 1984. O-(5-oxo-2-imidazolin-2-yl)arylcarboxylates: A new class of herbicides. Abstr. Am. Chem. Soc. 188:30.
18. Malefyt, T., Marc, P. A., Los, M., Orwick, P. L., and Umeda, K. 1984. AC 263,499—A new broad spectrum herbicide for soybeans and other leguminous crops. Weed Sci. Soc. Am. Abstr. 24:18.
19. Manely, B. S., Wilson, H. P., and Hines, T. E. 1995. An altered acetolactate synthase is the basis for imidazolinone resistance in smooth pigweed (Amaranthus hybridus L.). Weed Sci. Soc. Am. Abstr. 35:64.
20. Nalewaja, J. D. 1986. Seed oils with herbicides. Med. Fac. Landbouww. Rijks. Univ. Gent. 51/2a:301310.
21. O'Donovan, J. T. and O'Sullivan, A. 1982. Amine salts of growth regulator herbicides antagonize paraquat. Weed Sci. 30:605608.
22. Rhodes, G. N. and Coble, H. D. 1984. Influence of bentazon on absorption and translocation of sethoxydim in goosegrass (Eleusine indica L.). Weed Sci. 32:595597.
23. Shaner, D. L., Anderson, P. C., and Stidham, M. A. 1984. Imidazolinones: potent inhibitors of acetohydroxy acid synthase. Plant Physiol. 76:545546.
24. Stoltenberg, D. E. and Wyse, D. L. 1986. Regrowth of quackgrass (Agropyron repens) following postemergence applications of haloxyfop and sethoxydim. Weed Sci. 34:664668.
25. Wanamarta, G., Penner, D., and Kells, J. J. 1989. The basis of bentazon antagonism on sethoxydim absorption and activity. Weed Sci. 37:400404.
26. Whitwell, T., Wehtje, G., Walker, R. H., and McGuire, J. A. 1985. Johnsongrass (Sorghum halepense) control in soybeans (Glycine max) with postemergence grass herbicides applied alone and in mixtures. Weed Sci. 33:673678.
27. Wilcut, J. W. 1991. Tropic croton (Croton glandulosus) control in peanut (Arachis hypogaea). Weed Technol. 5:795798.
28. Zollinger, R. K. Influence of adjuvants and herbicide combinations on imazethapyr efficacy. 1993. Weed Sci. Soc. Am. Abstr. 33:5.

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