Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-28T13:23:06.150Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Oil Adjuvants and Nitrogen Fertilizer on the Efficacy of Imazethapyr Applied at Conventional and Ultralow Spray Volumes

Published online by Cambridge University Press:  12 June 2017

Gene D. Wills ,
James E. Hanks ,
Elizabeth J. Jones  and
Robert E. Mack
Gene D. Wills
Affiliation:
Delta Research and Extension Center, Mississippi Agriculture and Forestry Experiment Station, Stoneville, MS 38776, E-mail: gwills@drec.msstate.edu
James E. Hanks
Affiliation:
Application Production Technology Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Stoneville, MS 38776
Elizabeth J. Jones
Affiliation:
Delta Research and Extension Center, Mississippi Agriculture and Forestry Experiment Station, Stoneville, MS 38776
Robert E. Mack
Affiliation:
Research and Development, Helena Chemical Co., Memphis, TN 38120
Get access Rights & Permissions [Opens in a new window]

Abstract

Field experiments evaluated pitted morningglory, velvetleaf, and barnyardgrass control in soybean with imazethapyr applied alone and with either crop oil concentrate at 1.0% v/v, a blend of methylated seed oil and organosilicone surfactant, or a blend of methylated seed oil, phosphate esters, and organosilicone surfactant at 0.5% v/v, each with and without a 28% N mixture of urea and ammonium nitrate (URAN) applied at 2.3 L/ha. Treatments were applied at spray volumes of 94 and 9.4 L/ha. Control of each species was often increased with the addition of both oil adjuvants and URAN. The blend of methylated seed oil, phosphate esters, and organosilicone surfactant and the blend of methylated seed oil and organosilicone surfactant were each more effective than crop oil concentrate on pitted morningglory and barnyardgrass, while each oil adjuvant was similar on velvetleaf. The URAN effectively increased imazethapyr control of all species. Control of all species was similar at the spray volume of 9.4 L/ha and at 94 L/ha.

Keywords

Imazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidpitted morningglory, Ipomoea lacunosa L. # IPOLAvelvetleaf, Abutilon theophrasti Medik. # ABUTHbarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGsoybean, Glycine max (L.) Merr.Crop oil concentratemethylated seed oilphosphate estersorganosilicone surfactantsilicone surfactantURANAbutilon theophrastiEchinochloa crus-galliIpomoea lacunosaGlycine maxABUTHECHCGIPOLANS, not significantPOST, postemergencePRE, preemergenceURAN, mixture of urea and ammonium nitrate
Type
Research
Information
Weed Technology , Volume 12 , Issue 3 , September 1998 , pp. 441 - 445
Copyright
Copyright © 1998 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

Barrentine, W. L. and McWhorter, C. G. 1988. Johnsongrass (Sorghum halepense) control with herbicides in oil diluents. Weed Sci. 36:102–110.CrossRefGoogle Scholar
Bohannan, D. R. and Jordan, T. N. 1995. Effects of ultra-low volume application on herbicide efficacy using oil diluents as carriers. Weed Technol. 9:682–688.CrossRefGoogle Scholar
Crop Protection Reference. 1997. New York: Chemical and Pharmaceutical Press. 2230 p.Google Scholar
Gillette, C. P. 1890. Experiments with arsenites. Iowa Agric. Exp. Stn. Bull. 10:409.Google Scholar
Hanks, J. E. and McWhorter, C. G. 1991. Variables affecting the use of positive displacement pumps to apply herbicides in ultralow volumes. Weed Technol. 5:111–116.CrossRefGoogle Scholar
Hanks, J. E. and McWhorter, C. G. 1993. Spray droplet size for water and paraffinic oil applied at ultralow volume. Weed Technol. 7:799–807.Google Scholar
Harris, L. E. and Hyslop, G. R. 1942. Selective sprays for weed control in crops. Oreg. Agric. Exp. Stn. Bull. 403:1–31.Google Scholar
Jansen, L. L., Gentner, W. A., and Shaw, W. C. 1961. Effects of surfactants on the herbicidal activity of several herbicides in aqueous spray systems. Weeds 9:381–405.CrossRefGoogle Scholar
Kent, L. M., Wills, G. D., and Shaw, D. R. 1991. Effect of ammonium sulfate, imazapyr, and environment on the phytotoxicity of imazethapyr. Weed Technol. 5:202–205.CrossRefGoogle Scholar
Klingaman, T. E., King, C. A., and Oliver, L. R. 1992. Effect of application rate, weed species, and weed stage of growth on imazethapyr activity. Weed Sci. 40:227–232.CrossRefGoogle Scholar
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. 4. AC263,499, a herbicide for use in legumes. Am. Chem. Soc. Abstr., vol. 188. 30 p.Google Scholar
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.Google Scholar
McWhorter, C. G. 1963. Effects of surfactants on the herbicidal activity of foliar sprays of diuron. Weeds 11:265–269.Google Scholar
McWhorter, C. G. 1971. The effect of alkali metal salts on the toxicity of MSMA and dalapon to johnsongrass. Weed Sci. Soc. Am. Abstr, Vol. 11. p. 84.Google Scholar
McWhorter, C. G. 1982. The use of adjuvants. In Hodgson, R. H., ed. Adjuvants for Herbicides. Champaign, IL: Weed Science Society of America. pp. 10–25.Google Scholar
McWhorter, C. G., Fulgham, F. E., and Barrentine, W. L. 1988. An air-assist spray nozzle for applying herbicides in ultralow volume. Weed Sci. 36:118–121.CrossRefGoogle Scholar
McWhorter, C. G. and Jordan, T. N. 1976. Effects of adjuvants and environment on the toxicity of dalapon to johnsongrass. Weed Sci. 24:257–260.Google Scholar
McWhorter, C. G. and Wills, G. D. 1978. Factors affecting the translocation of 14C-mefluidide in soybeans (Glycine max), common cocklebur (Xanthium pensylvanicum), and johnsongrass (Sorghum halepense). Weed Sci. 26:382–388.Google Scholar
Tischer, N., Quimba, G. P., and Bejuki, W. N. 1951. Activators which considerably increase the defoliant and phytotoxicity properties of endothall. Proc. Northeast. Weed Control Conf. 5:35–44.Google Scholar
Van Valkenburg, J. W. 1982. Terminology, classification, and chemistry. In Hodgson, R. H., ed. Adjuvants for Herbicides. Champaign. IL: Weed Science Society of America. pp. 1–9.Google Scholar
Weis, M. E. 1987. Imazethapyr applied postemergence in soybeans with nonionic surfactants and fertilizer solutions. Proc. N. Cent. Weed Control Conf. 42:44.Google Scholar
Wills, G. D. 1971. Effects of inorganic salts on the toxicity of dalapon and MSMA to purple nutsedge. Weed Sci. Soc. Am. Abstr., Vol. 11. p. 84.Google Scholar
Wills, G. D. 1973. Effects of inorganic salts on the toxicity of glyphosate to purple nutsedge. Weed Sci. Soc. Am. Abstr., Vol. 13. p. 59.Google Scholar
Wills, G. D. 1978. Factors affecting toxicity and translocation of glyphosate in cotton (Gossypium hirsutum). Weed Sci. 26:509–513.CrossRefGoogle Scholar
Wills, G. D., Hanks, J. D., and Mack, R. E. 1993. Application of imazethapyr to barnyardgrass [Echinochloa crus-galli (L.) Beauv.] at conventional and ultra-low spray volumes. Weed Sci. Soc. Am. Abstr. 33:125.Google Scholar
Wills, G. D., Hanks, J. E., and Womble, W. L. 1992. Low versus high volume application of imazethapyr to pitted morningglory, Ipomoea lacunosa. Proc. 1st Int. Weed Control Congr. (Melbourne, Australia) 12:568.Google Scholar
Wills, G. D. and McWhorter, C. G. 1983. Effect of environment and adjuvants on the translocation and toxicity of fluazifop in Cynodon dactylon and Sorghum halepense . Aspects Appl. Biol. 4:283–290.Google Scholar
Wills, G. D. and McWhorter, C. G. 1985. Effect of inorganic salts on the toxicity and translocation of glyphosate and MSMA in purple nutsedge (Cyperus rotundus). Weed Sci. 33:755–761.CrossRefGoogle Scholar
Wills, G. D. and McWhorter, C. G. 1987. Influence of inorganic salts and imazapyr on control of pitted morningglory (Ipomoea lacunosa) with imazaquin and imazethapyr. Weed Technol. 1:328–331.CrossRefGoogle Scholar
Wills, G. D. and McWhorter, C. G. 1988. Absorption and translocation of herbicides—effect of environment, adjuvants, and inorganic salts. In Cross, B. and Scher, H. B., eds. Pesticide Formulations. ACS Symposium Ser. 371. Washington, DC: American Chemical Society. pp. 90–91.Google Scholar