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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  and
John W. Wilcut
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
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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.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidflurtamone, (±)-5-(methylamino)-2-phenyl-4-[3-(trifluoromethyl)phenyl]-3(2H)-furanonepyridate, O-(6-chloro-3-phenyl-4-pyridazinyl)-S-octyl carbonothioatepurple nutsedge, (Cyperus rotundus L. # CYPRO)yellow nutsedge, (Cyperus esculentus L. # CYPES)azalea, (Rhododendron obtusum Planch. ‘HinoCrimson’)dwarf Burford holly, (Ilex cornuta Lindl. ‘Burfordii Nana’)Compacta holly, (I. crenata Thunb. ‘Bennetts Compacta’)blue rug juniper, (Juniperus horizontalis Moench ‘Wiltoni’)fraser (redtip) photinia, (Photinia x fraseri Lindl.)yellow daylily, (Hemerocallus spp.)green liriope, (Liriope muscari Bailey)Ornamentalspreemergence herbicidespostemergence herbicidesCYPESCYPRO
Type
Research
Information
Weed Technology , Volume 7 , Issue 1 , March 1993 , pp. 112 - 117
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

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