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Grubbing for Control of Blackbrush Acacia (Acacia rigidula) Invading Rootplowed Rangeland

Published online by Cambridge University Press:  12 June 2017

Bobby T. Cross  and
Harold T. Wiedemann
Bobby T. Cross
Affiliation:
Texas Agric. Exp. Stn., P.O. Box 1658, Vernon, TX 76384
Harold T. Wiedemann
Affiliation:
Texas Agric. Exp. Stn., P.O. Box 1658, Vernon, TX 76384
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Abstract

Invasion of rootplowed rangeland by blackbrush acacia (Acacia rigidula Benth. ♯ ACARI) is a problem in south Texas. Low-energy grubbing uprooted plants 1 to 2.5 m tall in densities of 50, 150, and 300 plants/ha at rates of 3.0, 1.6, and 1.0 ha/h, respectively, yielding an average plant kill of 85%. Plants grubbed above the second major lateral root sprouted. A grubbing depth of 20 to 30 cm was necessary to assure plant death. A grubbing blade modified by the addition of ripper teeth facilitated grubbing under dry soil conditions and extended the grubbing season. Contract cost for grubbing the average density of 169 plants/ha was $20.80/ha adjusted to 1983 dollars.

Keywords

Prosopis juliflorabrush controleconomics of weed controlACARIPRCJG
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 2 , March 1985 , pp. 263 - 266
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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