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Cost-Effective Long-Term Leafy Spurge (Euphorbia esula) Control with Herbicides

Published online by Cambridge University Press:  12 June 2017

Rodney G. Lym  and
Calvin G. Messersmith
Rodney G. Lym
Affiliation:
Crop and Weed Sci. Dep., N. D. State Univ., Fargo, ND 58105
Calvin G. Messersmith
Affiliation:
Crop and Weed Sci. Dep., N. D. State Univ., Fargo, ND 58105
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Abstract

Four herbicide treatments applied in the spring or fall were evaluated for leafy spurge control and forage production in eastern and western North Dakota during a 5-yr experiment. All treatments gradually reduced the leafy spurge infestation at both locations except 2,4-D at 2.2 kg ae ha-1 applied annually in the spring or fall and picloram plus 2,4-D at 0.28 plus 1.1 kg ae ha-1 applied annually in the fall. The most cost effective treatment was picloram plus 2,4-D applied annually in the spring which provided a net return of $284 and $108/ha in eastern and western North Dakota, respectively, and averaged 80% leafy spurge control. Picloram at 2.2 kg ha-1 was reapplied only when leafy spurge control declined to less than 70% and provided a net return of $96/ha in eastern North Dakota, but a net loss of $235/ha in western North Dakota. Dicamba at 9 kg ae ha-1 was applied up to four times to maintain 70% control with an average net loss of $458/ha. Total potential production and value of forage will determine if a specific treatment is cost effective in any one location.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidpicloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid2,4-D, (2,4-dichlorophenoxy)acetic acidleafy spurge, Euphorbia esula L. ♯3 EPHES.;Forage productiondicambapicloram2,4-D
Type
Research
Information
Weed Technology , Volume 4 , Issue 3 , September 1990 , pp. 635 - 641
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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