Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-26T03:57:32.639Z Has data issue: false hasContentIssue false
  • English
  • Français

Temperature, Adjuvants, and UV Light Affect Sethoxydim Phytotoxicity

Published online by Cambridge University Press:  12 June 2017

Robert Matysiak  and
John D. Nalewaja
Robert Matysiak
Affiliation:
North Dakota State University, Fargo, ND 58105
John D. Nalewaja*
Affiliation:
North Dakota State University, Fargo, ND 58105
*
Corresponding author's E-mail: [email protected].
Get access Rights & Permissions [Opens in a new window]

Abstract

Experiments were conducted using oat in the greenhouse to determine phytotoxicity and spray deposit characteristics of sethoxydim on oat as influenced by adjuvants, ultraviolet (UV) light, and temperature at and shortly after application. Petroleum oil of low viscosity was equal or more effective with sethoxydim when applied at 10 than at 25 C, but high-viscosity petroleum oil was more effective at 25 than at 10 C. UV light reduced sethoxydim efficacy more for high- than low-viscosity petroleum oil adjuvant at 25 C, but not at 10 C. Commercial vegetable oil adjuvant was less effective with sethoxydim at 10 than at 25 C, and UV light reduced efficacy at both temperatures. Commercial methylated vegetable oil was the most effective adjuvant and efficacy was only slightly reduced by UV light at 25 C. A secondary alcohol surfactant that is considered hydrophilic enhanced sethoxydim efficacy even when exposed to UV light. Adjuvants that gave discernible uniform spray deposits with close contact to the epicuticular surface, including over anticlinal walls, resulted in the most effective treatments. The results indicated that temperature at application is important to adjuvant efficacy, partly because of the effect on spray deposit characteristics.

Keywords

Sethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-oneoat, Avena sativa L.SEMspray depositsurfactantvegetable oilviscosityCST, centipoisHLB, hydrophilic—lipophilic balanceMVO, methylated vegetable oilPO, petroleum oilSAE, secondary alcohol ethoxylateUV, ultravioletVO, vegetable oil
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 94 - 99
Copyright
Copyright © 1999 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

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.CrossRefGoogle Scholar
Cranmer, J. R. and Linscott, L. D. 1990. Droplet makeup and the effect on phytotoxicity of glyphosate in velvetleaf. Weed Sci. 38:406–410.Google Scholar
deRuiter, H. and Meinen, E. 1995. Influence of surfactant and water stress on the efficacy, absorption and translocation of glyphosate. In Gaskin, R. E., ed., Adjuvants for Agrochemicals. Rotorua, New Zealand: NZ Forestry Research Institute Bull. 193. pp. 211–216.Google Scholar
Grafstrom, L. D. and Nalewaja, J. D. 1988. Uptake and translocation of fluazifop in green foxtail (Setaria viridis). Weed Sci. 36:153–158.CrossRefGoogle Scholar
Green, J. M., Brown, P. A., Berengut, D., and King, M. G. 1992. Nonionic surfactant property effects on thifensulfuron methyl performance in soybeans. In Foy, C. L., ed. Adjuvants for Agrichemicals. Boca Raton, FL: CRC Press. pp. 525–532.Google Scholar
Harrison, S. K. and Wax, L. M. 1986. The effect of adjuvants and oil carriers on photodecomposition of 2,4-D, bentazon, and haloxyfop. Weed Sci. 34:81–87.Google Scholar
Harrison, S. K., Wax, L. M., and Bode, L. E. 1986. Influence of adjuvants and application variables on postemergence weed control with bentazon and sethoxydim. Weed Sci. 34:462–466.Google Scholar
Hazen, J. L. and Krebs, P. J. 1992. Photodegradation and absorption of sethoxydim as adjuvant-influenced surface effects. In Foy, C. L., ed. Adjuvants for Agrichemicals. Boca Raton, FL: CRC Press. pp. 195–204.Google Scholar
Manthey, F. A. and Nalewaja, J. D. 1992. Relative wax solubility and phytotoxicity of oil to green foxtail [Setaria viridis (L.) Beauv.] In Foy, C. L., ed. Adjuvants for Agrichemicals. Boca Raton, FL: CRC Press. pp. 463–471.Google Scholar
McInnes, D., Harker, K. N., Blackshaw, R. E., and Vanden Born, W. H. 1992. The influence of ultraviolet light on the phytotoxicity of sethoxydim tank mixtures with various adjuvants. In Foy, C. L., ed. Adjuvants for Agrichemicals. Boca Raton, FL: CRC Press. pp. 206–213.Google Scholar
Nalewaja, J. D. and Matysiak, R. 1995. Ethoxylated linear alcohol surfactants affect glyphosate and fluazifop absorption and efficacy. In Gaskin, R. E., ed. Adjuvants for Agrochemicals. Rotorua, New Zealand: NZ Forestry Research Institute Bull. 193. pp. 291–296.Google Scholar
Nalewaja, J. D., Matysiak, R., and Freeman, T. P. 1992. Spray droplet residual of glyphosate in various carriers. Weed Sci. 40:576–589.Google Scholar
Nalewaja, J. D., Matysiak, R., and Szelezniak, E. 1994. Sethoxydim response to spray carrier chemical properties and environment. Weed Technol. 8:591–597.Google Scholar
Nalewaja, J. D., Praczyk, T., and Matysiak, R. 1995. Surfactants and oil adjuvants with nicosulfuron. Weed Technol. 9:689–695.Google Scholar
Stock, D. and Holloway, P. J. 1993. Possible mechanisms for surfactant-induced foliar uptake of agrochemicals. Pestic. Sci. 38:165–177.Google Scholar
Tanaka, F. S., Wein, R. G., and Mansager, E. R. 1981. Effect of nonionic surfactants on the photochemistry of 3-(4-chlorophenol)-1,1-dimethylurea in aqueous solution. J. Agric. Food Chem. 27:774–779.CrossRefGoogle Scholar
Wills, G. D. 1984. Toxicity and translocation of sethoxydim in bermudagrass (Cynodon dactylon) as affected by environment. Weed Sci. 32:20–24.CrossRefGoogle Scholar