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Control of Oaks (Quercus spp.) and Associated Woody Species on Rangeland with Tebuthiuron

Published online by Cambridge University Press:  12 June 2017

C. J. Scifres
Affiliation:
Texas Agric. Exp. Stn. and Res. Agron., U.S. Dep. Agric., Sci. Ed. Admin., Agric. Res., Dep. Range Sci., Texas A&M Univ., College Station, TX 77843
J. W. Stuth
Affiliation:
Texas Agric. Exp. Stn. and Res. Agron., U.S. Dep. Agric., Sci. Ed. Admin., Agric. Res., Dep. Range Sci., Texas A&M Univ., College Station, TX 77843
R. W. Bovey
Affiliation:
Texas Agric. Exp. Stn. and Res. Agron., U.S. Dep. Agric., Sci. Ed. Admin., Agric. Res., Dep. Range Sci., Texas A&M Univ., College Station, TX 77843

Abstract

Aerial applications of 20% tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N-dimethylurea} pellets at 2.2 kg/ha (ai) in the spring effectively controlled post oak (Quercus stellata Wangenh.), blackjack oak (Q. marilandica Muenchh.), water oak (Q. nigra L.), yaupon (Ilex vomitoria Ait.), winged elm (Ulmus alata Michx.), downy hawthorn (Crataegus mollis Scheele), gum bumelia [Bumelia lanuginosa (Michx.) Pers.], and willow baccharis (Baccharis salicina Torr. & Gray) in the Post Oak Savannah of Texas. Tree huckleberry (Vaccinium arboreum Marsh.), black hickory (Carya texana Buckl.), honeylocust (Gleditsia triachanthos L.) and cedar elm (Ulmus crassifolia Nutt.) were partially controlled by 2.2 kg/ha of tebuthiuron. Canopies of buckbrush (Symphoricarpos orbiculatus Moench), southern dewberry (Rubus trivialis Michx.), American beautyberry (Callicarpa americana L.), and persimmon (Diospyros virginiana L.) were reduced for about two growing seasons after which the woody species recovered. American beautyberry appeared to increase in abundance by the third growing season after control of the other woody species. Honey mesquite [Prosopis juliflora (Swartz) DC. var. glandulosa (Torr.) Cockerell], eastern redcedar (Juniperus virginiana L.), and Texas persimmon (Diospyros texana Scheele) were not controlled by tebuthiuron at 2.2 or 4.4 kg/ha, and saw greenbrier (Similax bona-nox L.) and peppervine [Ampelopsis arborea (L.) Koehne] apparently increased following application of tebuthiuron.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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References

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