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Forage and Livestock Production Following Oak (Quercus spp.) Control with Tebuthiuron

Published online by Cambridge University Press:  12 June 2017

Charles J. Scifres
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843
Jerry W. Stuth
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843
Donald R. Kirby
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843
Raymond F. Angell
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843

Abstract

Aerial applications of 20% tebuthiuron JA/-[5-(1,1- dimethylethyl) - 1, 3, 4 - thiadiazol-2 -yl] -N, N' dimethylurea pellets at 2.2 or 4.4 kg/ha in the spring to heavy brush cover in Texas Post Oak Savannah did not increase the amount of grass, compared to that of untreated pastures, until the growing season after application. By the second growing season after tebuthiuron application, however, native grass stands were composed of a higher proportion of perennial species of good-to-excellent grazing value than were stands on adjacent, untreated rangeland. Tebuthiuron at 4.4 kg/ha did not improve botanical composition of grass stands, but increased the amount of grass during the second and third growing season after application compared to those where 2.2 kg/ha were applied. Daily steer gains were increased in one experiment in the fall after application of 2.2 kg/ha of tebuthiuron in the spring, but were unchanged after two growing seasons in another. Days of available grazing were increased, however, by the second or third growing season after treatment with 2.2 kg/ha of the herbicide in both experiments.

Information

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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