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Carrier Volume Adjustments Improve Imazamethabenz Efficacy

Published online by Cambridge University Press:  12 June 2017

Robert N. Stougaard
Robert N. Stougaard*
Affiliation:
Northwestern Agricultural Research Center, Kalispell, MT 59901; E-mail: rns@montana.edu
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Abstract

Reduced-rate herbicide strategies, which rely on treatment of small weed seedlings, are not effective under all situations. The consistency of reduced-rate treatments may be improved by adjustments in application variables. Field experiments were conducted at Kalispell, MT, during 1994 and 1995 to determine the effects of carrier volume on the efficacy of reduced-rate imazamethabenz applications for wild oat control in barley. Imazamethabenz was applied to two- and four-leaf wild oat plants at 0.26 and 0.52 kg ai/ha in carrier volumes of 75, 150, and 225 L/ha. Wild oat control generally increased as carrier volume increased, regardless of imazamethabenz rate or wild oat growth stage. However, increasing carrier volumes had a greater positive effect on wild oat control when imazamethabenz was applied to two-leaf vs. four-leaf wild oat seedlings. Barley yield was most affected by the duration of wild oat interference, with the greatest yield being observed with the earliest application. Barley yield tended to increase as carrier volume increased in 1 of 2 yr. These results indicate that wild oat control with imazamethabenz can be enhanced by increasing carrier volume, providing more consistent wild oat control from reduced imazamethabenz rates.

Keywords

Imazamethabenz, (±)-2[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-4(and 5)-methylbenzoic acid (3:2)wild oat, Avena fatua L. #AVEFAbailey, Hordeum vulgare L.Application timingphenologyspray volumeAvena fatuaHordeum vulgareAVEFA
Type
Research
Information
Weed Technology , Volume 13 , Issue 2 , June 1999 , pp. 227 - 232
Copyright
Copyright © 1999 by the Weed Science Society of America 

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References

Literature Cited

Barrentine, W. L. 1989. Minimum effective rate of chlorimuron and imazaquin applied to common cocklebur (Xanthium strumarium). Weed Technol. 3:126–130.Google Scholar
Brewster, B. D. and Appleby, A. P. 1990. Effect of rate, carrier volume, and surfactant on imazamethabenz efficacy. Weed Technol. 4:291–293.Google Scholar
Buhler, D. D. and Burnside, O. C. 1983. Effect of spray components on glyphosate toxicity to annual grasses. Weed Sci. 31:124–130.Google Scholar
Buhler, D. D. and Burnside, O. C. 1984. Effect of application factors on postemergence phytotoxicity of fluazifop-butyl, haloxyfop-methyl, and sethoxydim. Weed Sci. 32:574–583.Google Scholar
Buhler, D. D., Gonsolus, J. L., and Ralston, D. F. 1993. Common cocklebur (Xanthium strumarium) control in soybeans (Glycine max) with reduced bentazon rates and cultivation. Weed Sci. 41:447–453.Google Scholar
Defelice, M. S., Brown, W. B., Aldrich, R. J., Sims, B. D., Judy, D. T., and Guethle, D. R. 1989. Weed control in soybeans (Glycine max) with reduced rates of postemergence herbicides. Weed Sci. 37:365–374.CrossRefGoogle Scholar
Devlin, D. L., Long, J. H., and Maddux, L. D. 1991. Using reduced rates of postemergence herbicides in soybeans (Glycine max). Weed Technol. 5:834–840.Google Scholar
Edmund, R. M. Jr. and York, A. C. 1987. Factors affecting postemergence control of sicklepod (Cassia obtusifolia) with imazaquin and DPX-F6025: spray volume, growth stage, and soil-applied alachlor and vernolate. Weed Sci. 35:216–223.Google Scholar
Lassiter, R. B. Jr. and Coble, H. D. 1987. Carrier volume effects on the antagonism of sethoxydim by bentazon. Weed Sci. 35:541–546.Google Scholar
Lee, S. D. and Oliver, L. R. 1982. Efficacy of acifluorfen on broadleaf weeds. Times and methods for application. Weed Sci. 30:520–526.Google Scholar
McKinlay, K. S., Ashford, R., and Ford, R. J. 1974. Effects of drop size, spray volume, and dosage on paraquat toxicity. Weed Sci. 22:31–34.Google Scholar
Nalewaja, J. D. 1977. Wild oats: global gloom. Proc. West. Soc. Weed Sci. 30:21–32.Google Scholar
O'Donovan, J. T., de St. Remy, E. A., O'Sullivan, P. A., Dew, D. A., and Sharma, A. K. 1985. Influence of the relative time of emergence of wild oat (Avena fatua) on yield loss of barley (Hordeum vulgare) and wheat (Triticum aestivum). Weed Sci. 33:498–503.Google Scholar
Steckel, L. E., Defelice, M. S., and Sims, B. D. 1990. Integrating reduced rates of postemergence herbicides and cultivation for broadleaf weed control in soybeans (Glycine max). Weed Sci. 38:541–545.Google Scholar