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Control of Yellow and Purple Nutsedges (Cyperus esculentus and C. rotundus) in Nursery Crops

Published online by Cambridge University Press:  12 June 2017

Jeffrey F. Derr
Affiliation:
Dep. Plant Pathol., Physiol. and Weed Sci., Va. Polytech. Inst. State Univ., Hampton Roads Agric. Exp. Stn., Virginia Beach, VA 23455
John W. Wilcut
Affiliation:
Dep. Agron., Univ. Ga., Coastal Plain Exp. Stn., Tifton, GA 31793

Abstract

Experiments were conducted to evaluate selective herbicides for yellow and purple nutsedge control in nursery crops. Chlorimuron at 0.03 and 0.06 kg ai ha−1 suppressed yellow and purple nutsedge shoot growth either PRE or POST and did not reduce growth of barberry, Burford holly, Compacta holly, azalea, juniper, or photinia, although shoot tip chlorosis was noted in all species except Burford holly and juniper. Imazaquin at 0.25 and 0.5 kg ha−1 and imazethapyr at 0.06 and 0.21 kg ha−1 reduced growth of azalea. Imazethapyr also reduced growth of barberry, juniper, and photinia. Chlorimuron, imazaquin, and imazethapyr inhibited liriope and daylily growth. Pyridate applied at 1.0 and 2.0 kg ha−1 POST did not control purple nutsedge. Pyridate and flurtamone applied POST did not control yellow nutsedge as effectively as chlorimuron, imazaquin, or imazethapyr. Flurtamone at 0.5 and 1.0 kg ha−1 applied PRE or POST controlled purple nutsedge. Both pyridate and flurtamone visibly injured most nursery crops tested, although plants generally outgrew the damage.

Type
Research
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

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