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This article in AJ

  1. Vol. 79 No. 2, p. 225-229
     
    Received: Mar 18, 1985
    Published: Mar, 1987


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doi:10.2134/agronj1987.00021962007900020011x

Growth Retardation of Bermudagrass with Metsulfuron Methyl and Sulfometuron Methyl1

  1. J. N. Rogers,
  2. E. M. Miller and
  3. J. W. King2

Abstract

Abstract

Our primary objective was to determine optimum times and rates for applications of metsulfuron methyl (MSM) (methyl 2-[(([(4-methoxyd-methyl-l,3,5-triazin-2-y1) amino] carbonyl) amino) sulfonyl] benzoate) and sulfometuron methyl (SMM) (methyl 2 [(([(4,6-dimethyl-2-primidinyl) amino] carbonyl) amino) sulfonyl] benzoate) to reduce mowing requirement without adversely affecting the aesthetic value of the bermudagrass [Cynodon dactylon (L.) Pers.] turfgrass. Field studies were conducted on mature bermudagrass lawn turf grown on a Captina silt loam soil (fine-silty, mixed, mesic Typic Fragiudalt). Results of 1982 and 1983 experiments showed that MSM alone produced much less growth reduction than a combination of MSM and SMM. The combination at rates of 35 + 35 and 70 + 70 g ha−1 and higher produced good growth suppression for 6 to 8 weeks followed by a flush of growth, but excessive discoloration injury especially when repeated at 5-week intervals. In 1984 the combination applied at 8.8 + 8.8 on 24 May, 17.5 + 17.5 on 28 June, and 35 + 35 on 2 August provided excellent growth retardation (70% mowing reduction) all season with only very slight injury. The influence of irrigation and N fertilization was minimal.

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