Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-28T03:17:10.388Z Has data issue: false hasContentIssue false
  • English
  • Français

Effectiveness of Herbicide Programs for Annual Bluegrass (Poa annua) Control in Bermudagrass (Cynodon dactylon)

Published online by Cambridge University Press:  12 June 2017

S. W. Bingham  and
R. L. Shaver
S. W. Bingham
Affiliation:
Dep. Plant Pathol. and Physiol., Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061
R. L. Shaver
Affiliation:
Dep. Plant Pathol. and Physiol., Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061
Get access Rights & Permissions [Opens in a new window]

Abstract

Annual bluegrass (Poa annua L.) growing in bermudagrass completes its life cycle in May and dies leaving open spaces in the turfgrass. This occurs at a time when summer annual weeds are germinating and these weeds fill the space formerly occupied by the annual bluegrass. As the summer annual weeds die in the fall, annual bluegrass germinates and fills the space formerly occupied by the summer annual weeds. To control annual bluegrass, it is important to control the summer annual grasses and manage the bermudagrass [Cynodon dactylon (L.) Pers.] to maintain a competitive groundcover especially during the peak germination period for the weeds. Herbicide programs over a three-year period were designed to control annual grasses with treatments in April for large crabgrass [Digitaria sanguinalis (L.) Scop.], in May or June for goosegrass [Eleusine indica (L.) Gaertn.] and in late August for annual bluegrass. Oxadiazon [2-tert-butyl-4-(2,4-dichloro-5-isopropoxyphenyl)-δ2-1,3,4-ozadiazolin-5-one] applied in August gave complete control of annual bluegrass. Although oxadiazon has a long residual life in the soil, annual bluegrass was poorly controlled with treatments made in June. Fall (August or September) applications of benefin [N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine], prosulfalin N-[[4-(dipropylamino)-3,5-dinitrophenyl] sulfonyl]-S,S-dimethylsulfilimine and butralin [4-(1,1-dimethylethyl-N-(1-methylpropyl)-2,6-dinitrobenzenamine] provided adequate control of annual bluegrass with only a few exceptions during the three-year period. Bensulide [O,O-diisopropyl phosphorodithioate S-ester with N-(2-mercaptoethyl)benzenesulfonamide] gave variable control of annual bluegrass; however, this was improved in programs with oxadiazon which provide goosegrass control during summer. In these studies, DCPA [dimethyl tetrachloroterephthalate], even with three applications a year, gave very little control of annual bluegrass. When oxadiazon was used in rotation with DCPA, adequate control was obtained.

Keywords

OxadiazonprosulfalinbensulidebenefinDCPA
Type
Research Article
Information
Weed Science , Volume 27 , Issue 4 , July 1979 , pp. 367 - 370
Copyright
Copyright © 1979 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Bingham, S. W., Schmidt, R. E., and Curry, C. K. 1969. Annual bluegrass control in overseeded bermudagrass putting green turf. Agron. J. 61:908–911.CrossRefGoogle Scholar
2. Bingham, S. W. and Shaver, R. L. 1978. Goosegrass control in bermudagrass. Proc. Int. Turfgrass Conf. 3:(In press).Google Scholar
3. Chappell, W. E., and Schmidt, R. E. 1961. Pre- and Post-emergence crabgrass and Poa annua control studies in Turf. Proc. South. Weed Conf. 14:91–97.Google Scholar
4. Goss, R. L. 1964. Pre-emergence control of annual bluegrass (Poa annua L.). Agron. J. 56:479–481.CrossRefGoogle Scholar
5. Horn, G. C. 1972. Farewell to Poa annua? Golf Superintendent 40(8):11–16.Google Scholar
6. Jagschitz, J. A. 1970. Chemical control of Poa annua L. in turfgrass and effect of various chemicals on seed production. Proc. Northeast. Weed Control Conf. 24:393–400.Google Scholar
7. Jaquemin, P. L. and Henderlong, P. R. 1976. Selective control of Poa annua In Kentucky bluegrass [Poa pratensis]. Proc. Northeast. Weed Sci. Soc. 30:345–350.Google Scholar
8. Johnson, B. J. 1976. Dates of herbicide application for summer weed control in turf. Weed Sci. 24:422–424.CrossRefGoogle Scholar
9. Johnson, B. J. 1977. Effect of herbicide treatments on overseeded putting green turf. Weed Sci. 25:343–347.CrossRefGoogle Scholar
10. Juska, F. V. and Hanson, A. A. 1967. Factors affecting Poa annua L. control. Weeds 15:98–101.CrossRefGoogle Scholar
11. Neidlinger, J. W., Furtick, W. R., and Goetze, N. R. 1968. Susceptibility of annual bluegrass and turfgrass to bensulide and three uracil herbicides. Weed Sci. 16:16–18.CrossRefGoogle Scholar