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Susceptibility of Selected Woody Plants to Hexazinone on South Texas Rangeland

Published online by Cambridge University Press:  12 June 2017

Charles J. Scifres ,
Allen Rasmussen ,
James L. Mutz  and
Benjamin H. Koerth
Charles J. Scifres
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843 Texas A&M Univ. Agric. Res. and Ext. Ctr., Corpus Christi, TX 78410
Allen Rasmussen
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843 Texas A&M Univ. Agric. Res. and Ext. Ctr., Corpus Christi, TX 78410
James L. Mutz
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843 Texas A&M Univ. Agric. Res. and Ext. Ctr., Corpus Christi, TX 78410
Benjamin H. Koerth
Affiliation:
Dep. Range Sci., Texas A&M Univ., College Station, TX 77843 Texas A&M Univ. Agric. Res. and Ext. Ctr., Corpus Christi, TX 78410
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Abstract

Grid applications of hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione] pellets at 2.2 kg ai/ha or less did not effectively control honey mesquite [Prosopis juliflora (Swartz) DC. var. glandulosa (Torr.) Cockerell ♯3 PRCJG], blackbrush acacia (Acacia rigidula Benth. ♯ ACARI), lotebush condalia [Condalia obtusifolia (Hook.) Weberb. ♯ CNCOF], granjeno (Celtis pallida Torr. ♯ CETPA) or twisted acacia [Acacia tortuosa (L.) Willd.] growing as mixed stands on clay loam or clay soils. Efficacy of hexazinone apparently was affected little by variation in rainfall ranging from 35% less to 51% greater than the long-term average during the year of application. Apparent mortality of honey mesquite, granjeno, and lotebush condalia was increased by increasing the application rate from 2.2 to 4.5 kg/ha on clay loam soils. Control of honey mesquite, blackbrush acacia, and twisted acacia with 2.2 kg/ha was better when applied to sandy clay loam than to clay soils.

Keywords

Prosopis julifloraAcacia rigidulaCondalia obtusifoliaAcacia tortuosaCeltis pallidaACARIPRCJGCNCOFCETPA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 4 , July 1984 , pp. 482 - 488
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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