Section 6
Chapter 5,051

Control of oaks quercus spp and associated woody species on rangeland with tebuthiuron

Scifres, C.J.; Stuth, J.W.; Bovey, R.W.

Weed Science 29(3): 270-275


ISSN/ISBN: 0043-1745
DOI: 10.2307/4043238
Accession: 005050573

Aerial applications of 20% tebuthiuron {N-[15-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N-dimethylurea} pellets at 2.2 kg/ha (ai [active ingredient]) in the spring effectively controlled post oak (Q. stellata Wangenh.), blackjack oak (A. 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. and Gray) in the Post Oak Savannah of Texas [USA]. Tree huckleberry (Vaccinium arboreum Marsh), black hickory (Carya texana Buckl.), honeylocust (Gleditisia triacanthos L.) and cedar elm (U. 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 2 growing seasons after which the woody species recovered. American beautyberry apparently increased in abundance by the 3rd 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 (D. texana Scheele) were not controlled by tebuthiuron at 2.2 or 4.4 kg/ha; and Greenbrier (Smilax bona-nox L.) and peppervine [Ampelopsis arborea (L.) Koehne] apparently increased following application of tebuthiuron.

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