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Chlorsulfuron for Weed Control in Safflower (Carthamus tinctorius)

Published online by Cambridge University Press:  12 June 2017

Randy L. Anderson
Randy L. Anderson*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Akron, CO 80720
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Abstract

Chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide} was nontoxic to safflower (Carthamus tinctorius L.) when applied postemergence in 1983 and 1984 at 0.018 and 0.035 kg ai/ha. Trifluralin [2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine] at 1.1 and 1.7 kg ai/ha and pronamide [3,5-dichloro(N-1,1-dimethyl-2-propynyl)benzamide] at 0.8 and 1.1 kg ai/ha were applied previously as preplant soil-incorporated treatments. In both years, safflower was relatively free of weeds where trifluralin was applied alone or in sequential treatments with chlorsulfuron. Pronamide, with or without chlorsulfuron, failed to completely control witchgrass (Panicum capillare L. ♯ PANCA) in 1 yr; thus safflower grain yields were reduced 21 to 35% when compared to weed-free safflower. Chlorsulfuron controlled redroot pigweed (Amaranthus retroflexus L. ♯ AMARE), puncturevine (Tribulus terrestris L. ♯ TRBTE), and common sunflower (Helianthus annuus L. ♯ HELAN).

Keywords

PhytotoxicitygerminationPanicum capillareAmaranthus retroflexusTribulus terrestrisHelianthus annuusPANCAAMARETRBTEHELAN
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 6 , November 1985 , pp. 840 - 842
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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