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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
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

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.

Type
Research
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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