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Leafy Spurge (Euphorbia esula) Response to Single and Repetitive Picloram Treatments

Published online by Cambridge University Press:  12 June 2017

David G. Hein
Affiliation:
Billings Institute of Religion, Billings, MT 59101
Stephen D. Miller
Affiliation:
P.O. Box 3354, University of Wyoming, Laramie, WY 82071

Abstract

A 4-yr field study was conducted near Grassrange, MT to determine the effects of single and repetitive picloram treatments for leafy spurge control in a native pasture. Single applications of picloram at 0.28, 0.56, 0.84, and 1.12 kg ae ha–1 averaged 0, 5, 22, and 61% leafy spurge shoot control 3 yr after treatment. Only the single applications of picloram at 1.68 and 2.24 kg ha–1 maintained leafy spurge control above 80%. A retreatment with 0.56 kg ha–1 picloram was required to maintain effective control for 3 yr when less than 1.68 kg ha–1 was applied. Leafy spurge canopy cover in the 1.68 and 2.24 kg ha–1 treatments averaged 14 and 6% 3 yr after treatment; however, all other single applications required retreatment.

Type
Note
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. Alley, H. P., Vore, R. E., and Whitson, T. D. 1982. A summary of original and three repetitive herbicide treatments for control of leafy spurge (Euphorbia esulaL.). In: Leafy Spurge Control in the Great Plains. GPC 14:6974.Google Scholar
2. Gylling, S. R., and Arnold, W. E. 1985. Efficacy and economics of leafy spurge (Euphorbia esula L.) control in pasture. Weed Sci. 33:381385.Google Scholar
3. Hein, D. G. 1988. Single and repetitive picloram treatments on leafy spurge (Euphorbia esula L.) and resulting changes in shoot density, canopy cover, forage production and utilization by cattle. PhD. thesis. Univ. of Wyo. Univ. Microfilms. Ann Arbor, MI (Diss. Abstr. AAD 88-27917).Google Scholar
4. Lym, R. G., and Kirby, D. R. 1987. Cattle foraging behavior in leafy spurge (Euphorbia esula)-infested rangeland. Weed Technol. 1:314318.Google Scholar
5. Lym, R. G., and Messersmith, C. G. 1983. Control of leafy spurge with herbicides. N.D. Farm Res. 40(5):1619.Google Scholar
6. Lym, R. G., and Messersmith, C. G. 1985. A summary of leafy spurge control with herbicides in North Dakota: 20 year summary. J. Range Manage. 38:149154.Google Scholar
7. Lym, R. G., and Messersmith, C. G. 1985. Leafy spurge control and improved forage production with herbicides. J. Range Manage. 38:386391.Google Scholar
8. Lym, R. G., and Messersmith, C. G. 1990. Cost-effective long term leafy spurge (Euphorbia esula) control with herbicides. Weed Technol. 4:635641.CrossRefGoogle Scholar
9. Pieper, R. D. 1973. Measurement Techniques for Herbaceous and Shrubby Vegetation. New Mexico State Univ., Las Cruces, NM. 148 p.Google Scholar