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Vegetation Management in the Cross Timbers: Response of Woody Species to Herbicides and Burning

Published online by Cambridge University Press:  12 June 2017

Jimmy F. Stritzke ,
David M. Engle  and
F. Ted McCollum
Jimmy F. Stritzke
Affiliation:
Dep. Agron., Okla. State Univ., Stillwater, OK 74078
David M. Engle
Affiliation:
Dep. Agron., Okla. State Univ., Stillwater, OK 74078
F. Ted McCollum
Affiliation:
Dep. Agron., Okla. State Univ., Stillwater, OK 74078
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Abstract

Brush control and woody plant community structure in the Cross Timbers of Oklahoma resulting from treatments with herbicides and fire were compared. Tebuthiuron and triclopyr were applied alone and in combination with burning at 2.2 kg ai ha-1 in March and June of 1983, respectively. The burned pastures were burned with strip headfires in late spring of 1985, 1986, and 1987. Both herbicides were effective on the dominant overstory brush species, blackjack oak and post oak, and this resulted in good reduction of canopy cover of brush initially. However, effects of triclopyr were short-lived because of ineffectiveness on many of the other hardwood species (American elm, gum bumelia, hackberry, roughleaf dogwood, and buckbrush). Crown reduction and tree kill of these hardwood species was usually better with tebuthiuron than with triclopyr. Neither herbicide was effective on eastern redcedar. Better brush control, associated with tebuthiuron, resulted in better fine fuel release and by 1988, burning was having a significant effect on woody plants in the tebuthiuron-treated plots.

Keywords

Tebuthiuron, N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylureatriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acidbuckbrush, Symphoricarpos orbiculatus Moench. ♯ SYPORgum bumelia, Bumelia lanuginosa (Michx.) Pers. ♯ BUMLAroughleaf dogwood, Cornus drummondii C. A. Meyer ♯ CRWDRAmerican elm, Ulmus americana L. ♯ ULMAMhackberry, Celtis occidentalis L. ♯ CELOCblackjack oak, Quercus marilandica Muenchh. ♯ QUEMApost oak, Quercus stellata Wangenh. ♯ QUESLeastern redcedar, Juniperus virginiana L. ♯ IUPVITebuthiurontriclopyrbrush controlprescribed burninghardwood forest
Type
Research
Information
Weed Technology , Volume 5 , Issue 2 , June 1991 , pp. 400 - 405
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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