Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-13T01:38:40.142Z Has data issue: false hasContentIssue false
  • English
  • Français

Dogfennel (Eupatorium capillifolium) Size at Application Affects Herbicide Efficacy

Published online by Cambridge University Press:  20 January 2017

Brent A. Sellers ,
Jason A. Ferrell ,
Gregory E. MacDonald  and
William N. Kline
Brent A. Sellers*
Affiliation:
Range Cattle Research and Education Center, University of Florida, Ona, FL 33865
Jason A. Ferrell
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL 32611
Gregory E. MacDonald
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL 32611
William N. Kline
Affiliation:
Dow AgroSciences, Duluth, GA 30096
*
Corresponding author's E-mail: sellersb@ufl.edu.
Get access Rights & Permissions [Opens in a new window]

Abstract

Dogfennel is one of the most problematic weeds in Florida pasturelands and its control can become inconsistent as the plant matures. A premix of triclopyr + fluroxypyr has been recently introduced for weed control in pastures and rangeland; however, little published information exists concerning the control of dogfennel in pastures with this herbicide combination. Therefore, experiments were initiated to determine the efficacy of triclopyr + fluroxypyr compared with commonly used pasture herbicides on dogfennel at three heights. All herbicides utilized in this study are commonly used for dogfennel control. Dogfennel control was affected by both herbicide treatment and dogfennel height. In general, 0.80 + 0.28 kg ai/ha of 2,4-D amine + dicamba resulted in inconsistent control, especially as dogfennel plants increased in size. Increasing the rate of 2,4-D amine + dicamba to 1.21 + 0.42 kg/ha increased the consistency. Triclopyr + fluroxypyr provided similar levels of control as that of 1.21 + 0.42 kg/ha 2,4-D amine + dicamba. In all locations, control of 154-cm dogfennel was signficanatly lower than that of 38-cm dogfennel. These data indicate that triclopyr + fluroxypyr is an effective option for dogfennel control, but dogfennel height at the time of application is an important factor for optimizing control.

Keywords

2,4-D AminedicambafluroxypyrtriclopyrDogfennel, Eupatorium capillifolium L.Foragesgrowth stagedogfennel heightpasturesrangeland
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 23 , Issue 2 , June 2009 , pp. 247 - 250
Copyright
Copyright © 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

Anonymous, , 2003. Survey of beef and forage practices used by beef cattlemen in south-central Florida. Available online: http://sfbfp.ifas.ufl.edu/sfbfp03survey.pdf.Google Scholar
Crowder, S. H., Cole, A. W., and Watson, V. H. 1982. Weed control and forage quality in tebuthiuron treated pastures. Weed Sci 31:585–587.CrossRefGoogle Scholar
Ferrell, J. A. and MacDonald, G. E. 2005. Dogfennel (Eupatorium capillifolium): biology and control. Florida Cooperative Extension Service, IFAS, UF SS-AGR-224.Google Scholar
Jelks, M. 1986. Allergy Plants that Cause Sneezing and Wheezing. Tampa, FL: World Wide Publications. 52.Google Scholar
MacDonald, G. E., Brecke, B. J., Colvin, D. L., and Shilling, D. G. 1992. Factors affecting germination of dogfennel (Eupatorium capillifolium) and yankeeweed (Eupatorium compositifolium). Weed Sci 40:424–428.Google Scholar
MacDonald, G. E., Brecke, B. J., Colvin, D. L., and Shilling, D. G. 1994. Chemical and mechanical control of dogfennel (Eupatorium capillifolium). Weed Technol 8:483–487.Google Scholar
SAS 1998. SAS/STAT User's Guide. Release 7.0. Cary, NC: SAS Institute. 1028.Google Scholar
USDA, National Agriculture Statistics Service 2002. Census of Agriculture. Farms, land in farms, value in land and buildings, and farm use: 2002 and 1997. Washington, DC. Available online: http://www.nass.usda.gov/census/census02/volume1/us/st99_2008_008.pdf.Google Scholar
Wahlers, R. L., Burton, J. D., Maness, E. P., and Skroch, W. A. 1997. A stem cut and blade delivery method of herbicide application for weed control. Weed Sci 45:829–832.Google Scholar
Wunderlin, R. P. and Hansen, B. F. 2003. Guide to the Vascular Plants of Florida. 2nd ed. Gainesville, FL: University Press of Florida. 787.Google Scholar