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Response of Macartney Rose (Rosa bracteata) and Understory Vegetation to Herbicides

Published online by Cambridge University Press:  12 June 2017

Robert E. Meyer  and
Rodney W. Bovey
Robert E. Meyer
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Dep. Range Sci. Texas A&M Univ., College Station, TX 77843
Rodney W. Bovey
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Dep. Range Sci. Texas A&M Univ., College Station, TX 77843
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Abstract

Picloram (4-amino-3,5,6-trichloropicolinic acid) and tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea} were the most effective herbicides for killing Macartney rose (Rosa bracteata Wendl.) on the Claypan Resource Area of Texas. At 4.5 kg/ha picloram (ae/ha) and tebuthiuron (ai/ha) as sprays killed 70% of the plants and as pellets 73 and 84% 1 yr after application, respectively. Bay Met 1486 {N-[5-(ethylsulfonyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea}, buthidazole {3-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-4-hydroxy-1-methyl-2-imidazolidinone}, 2,4-D [(2,4-dichlorophenoxy) acetic acid], 3,6-dichloropicolinic acid, glyphosate [N-(phosphonomethyl)glycine], hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione], and triclopyr {[(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid} were markedly less effective than either picloram or tebuthiuron. After 2 to 4 months, 2,4-D, picloram, picloram + 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], and triclopyr reduced the Macartney rose canopy by at least 95%, but only picloram and tebuthiuron controlled Macartney rose after 3 yr. Sprays of glyphosate and hexazinone inhibited growth of grasses after 3 months. Most herbicide sprays reduced broadleaf cover for at least 3 months.

Keywords

Bay Met 1486buthidazole2,4-D3,6-dichloropicolinic acidhexazinonepicloramtebuthiuron2,4,5-Ttriclopyr
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 1 , January 1984 , pp. 63 - 67
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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