Skip to main content
×
×
Home

Influence of Diflufenzopyr Addition to Picolinic Acid Herbicides for Russian Knapweed (Acroptilon repens) Control

  • Stephen F. Enloe (a1) and Andrew R. Kniss (a1)
Abstract

Diflufenzopyr is a synergist that has improved the efficacy of certain auxin-type herbicides such as dicamba on many broadleaf weed species. However, little is known regarding the activity of diflufenzopyr with other auxin-type herbicides. Russian knapweed is an invasive creeping perennial that is susceptible to certain pyridine carboxylic acids, which are auxin-type herbicides. The objective of this research was to determine if the addition of diflufenzopyr to three pyridine carboxylic acid herbicides enhances long-term control of Russian knapweed in Wyoming. All treatments were applied in the fall. Treatments included aminopyralid (0, 0.05, 0.09, and 0.12 kg ae/ha), clopyralid (0, 0.16, 0.21, 0.31, and 0.42 kg ae/ha) and picloram (0, 0.14, 0.28, 0.42, and 0.56 kg ae/ha), applied with and without diflufenzopyr (0.06 and 0.11 kg ae/ha). Twelve mo after treatment (MAT), diflufenzopyr had no significant impact on Russian knapweed control with either aminopyralid or picloram, and had significant but inconsistent impacts on knapweed control with clopyralid. At 24 MAT, diflufenzopyr did not enhance Russian knapweed control with either aminopyralid or clopyralid and was slightly antagonistic with picloram. These results indicate that the addition of diflufenzopyr does not improve Russian knapweed control with fall applications of either aminopyralid, clopyralid, or picloram.

Copyright
Corresponding author
Corresponding author's E-mail: sfe0001@auburn.edu.
References
Hide All
Anonymous, , 2009. Tordon® 22K herbicide label. Dow AgroSciences. http://www.cdms.net/LDat/ld0AJ012.pdf. Accessed: March 6, 2009.
Anonymous, , 2008a. Milestone® herbicide label. Dow AgroSciences. http://www.cdms.net/LDat/ld77N006.pdf. Accessed: March 6, 2009.
Anonymous, , 2008b. Transline® herbicide label. Dow AgroSciences. http://www.cdms.net/LDat/ld0BB014.pdf. Accessed: March 6, 2009.
Anonymous, , 2004. Overdrive® herbicide label. BASF. http://www.cdms.net/LDat/ld6CA004.pdf. Accessed: December 8, 2008.
Bowe, S., Landes, M., Best, J., Schmitz, G., and Graben, M. 1999. BAS 662 H: an innovative herbicide for weed control in corn. Proc. Brighton Conf. Weeds 1:3540.
Boyles, M. C. and Smith, K. L. 2000. Potential use of diflufenzopyr in combination with dicamba for weed control in pastures. Proc. South. Weed Sci. Soc 53:60.
Bussan, A. J. and Dyer, W. E. 1999. Herbicides and rangeland. Pages 116132. In Sheley, R. L. and Petroff, J. K. Biology and Management of Noxious Range Weeds. Corvallis, OR: Oregon State University Press.
Enloe, S. F., Kyser, G. B., Dewey, S. A., Peterson, V. F., and DiTomaso, J. M. 2008. Russian knapweed (Acroptilon repens) control with low rates of aminopyralid on range and pasture. Invasive Plant Sci. Manage 1:385389.
Enloe, S. F., Lym, R. G., Wilson, R., et al. 2007. Canada thistle (Cirsium arvense) control with aminopyralid in range, pasture, and noncrop areas. Weed Technol 21:890894.
Ferrell, J. A., Mullahey, J. J., Langeland, K. A., and Kline, W. N. 2006. Control of tropical soda apple (Solanum viarum) with aminopyralid. Weed Technol 20:453457.
Grossman, K., Casper, G., Kwiatkowski, J., and Bowe, S. J. 2002. On the mechanism of selectivity of the corn herbicide BAS 662H: a combination of the novel auxin transport inhibitor diflufenzopyr and the auxin herbicide dicamba. Pest Manage. Sci 58:10021014.
Lym, R. G. and Deibert, K. J. 2005. Diflufenzopyr influences leafy spurge (Euphorbia esula) and Canada thistle (Cirsium arvense) control by herbicides. Weed Technol 19:329341.
Ni, H., Wehtje, G., Walker, R. H., Belcher, J. L., and Blythe, E. K. 2006. Turf tolerance and Virginia buttonweed (Diodia virginiana) control with fluroxypyr as influenced by the synergist diflufenzopyr. Weed Technol 20:511519.
R Development Core Team 2008. R: A Language and Environment for Statistical Computing. Vienna, Austria: R Foundation for Statistical Computing. http://www.R-project.org. Accessed: December 2008.
Ritz, C. and Streibig, J. C. 2005. Bioassay Analysis Using R. J. Statistical Software 12/5:http://www.jstatsoft.org/. Accessed: December 1, 2008.
Wehtje, G. 2008. Synergism of dicamba with diflufenzopyr with respect to turfgrass weed control. Weed Technol 22:679684.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Weed Technology
  • ISSN: 0890-037X
  • EISSN: 1550-2740
  • URL: /core/journals/weed-technology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 5 *
Loading metrics...

Abstract views

Total abstract views: 138 *
Loading metrics...

* Views captured on Cambridge Core between 20th January 2017 - 23rd September 2018. This data will be updated every 24 hours.