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Agronomy Journal Abstract -

Growth Retardation of Bermudagrass with Metsulfuron Methyl and Sulfometuron Methyl1


This article in AJ

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

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



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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