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Effect of MON 12037 on the Growth and Tuber Viability of Purple Nutsedge (Cyperus rotundus)

Published online by Cambridge University Press:  12 June 2017

William T. Molin ,
Alison A. Maricic ,
Rehana A. Khan  and
Charles F. Mancino
William T. Molin*
Affiliation:
Department of Plant Science, University of Arizona, Tucson, AZ 85721
Alison A. Maricic
Affiliation:
Department of Plant Science, University of Arizona, Tucson, AZ 85721
Rehana A. Khan
Affiliation:
Department of Plant Science, University of Arizona, Tucson, AZ 85721
Charles F. Mancino
Affiliation:
Department of Agronomy, Pennsylvania Stale University, University Park, PA 16802
*
Corresponding author's E-mail: wmolin@ag.arizona.edu.
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Abstract

A field study was conducted in 1994 and 1995 to determine the efficacy of MON 12037 on purple nutsedge in a bermudagrass turf. The percentage of bermudagrass infested with purple nutsedge following a single application of MON 12037 decreased from 60 to 30% at 18 g ai/ha and to approximately 20% at 36, 54, and 72 g/ha. Regrowth of purple nutsedge occurred between 28 and 55 d after treatment (DAT) and was greatest at 18 g/ha. A second application of MON 12037 reduced purple nutsedge percent infestation similarly to one application. Tuber weight and number were not affected by either one or two applications of MON 12037; however, tuber viability decreased after two applications. These results suggest that when using MON 12037, a program of several years duration may be required to successfully manage purple nutsedge in a bermudagrass turf because viable tubers persist following two applications of MON 12037 in a season.

Keywords

MON 12037, methyl 5-[((4,6-dimethoxy-2-pyrimidinyl)amino)carbonylaminosulfonyl]-3-chloro-1-methyl-1H-pyrazole-4-carboxylatepurple nutsedge, Cyperus rotundus L. # CYPRObermudagrass, Cynodon dactylon (L.) Pers. # CYNDATuber viabilitynutsedge regrowthDAT, days after treatmentPOST, postemergenceWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 1 - 5
Copyright
Copyright © 1999 by the Weed Science Society of America 

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