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Control of Yellow and Purple Nutsedges (Cyperus esculentus and Cyperus rotundus) in Turfgrass with MON-12051

Published online by Cambridge University Press:  12 June 2017

Mark A. Czarnota  and
S. Wayne Bingham
Mark A. Czarnota
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
S. Wayne Bingham
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
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Abstract

Field studies were conducted from 1993 to 1995 to evaluate MON-12051 for turfgrass tolerance and control of yellow and purple nutsedges. The availability of herbicides for selective control of these weeds in turfgrass is limited. A sulfonylurea compound, MON-12051, has recently been developed for selective control of the nutsedges in turfgrass. When MON-12051 was applied at 0.07 to 0.14 kg ai/ha, the injury to Kentucky bluegrass, tall fescue, bermudagrass, and zoysiagrass was slight, with a maximum of 10% injury. At these rates, MON-12051 outperformed both bentazon and imazaquin in controlling yellow and purple nutsedges. Averaged over all tests 6 wk after treatment, yellow nutsedge control with MON-12051 was 83%. Control averaged 44% during the same period when treated with bentazon, whether applied once at 2.24 kg ai/ha or twice at 1.12 kg ai/ha. Purple nutsedge control averaged 96% when treated with MON-12051 in Kentucky bluegrass, while control was 42% with imazaquin applied at 0.19 and 0.43 kg ai/ha.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideimazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-y 1]-3-quinolinecarboxylic acidMON-12051, methyl 5-{[(4,6-dimethoxy-2-pyrimidinyl)-amino]carbonylaminosulfonyl}-3-ch loro-1-methyl-1-H-pyrazole-4-carboxylatepurple nutsedge, Cyperus rotundus L. # CYPROyellow nutsedge, Cyperus esculentus L. # CYPESbermudagrass, Cynodon dactylon (L.) Pers. ‘Tifway’ and ‘Vamont’Kentucky bluegrass, Poa pratensis L. ‘Plush’tall fescue, Festuca arundinaceae Schreb. ‘Confederate’zoysiagrass, Zoysia japonica Steud. ‘Meyer.’BentazonhalosulfuronimazaquinCYPESCYPROWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 11 , Issue 3 , September 1997 , pp. 460 - 465
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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