Hostname: page-component-848d4c4894-xfwgj Total loading time: 0 Render date: 2024-06-23T02:35:06.644Z Has data issue: false hasContentIssue false
  • English
  • Français

Responses of Monoecious and Dioecious Hydrilla (Hydrilla verticillata) to Various Concentrations and Exposures of Diquat

Published online by Cambridge University Press:  12 June 2017

Thai K. Van ,
Kerry K. Steward  and
Richard D. Conant Jr.
Thai K. Van
Affiliation:
Aquatic Plant Management Lab., Agric. Res. Serv., U.S. Dep. Agric., Fort Lauderdale, FL 33314
Kerry K. Steward
Affiliation:
Aquatic Plant Management Lab., Agric. Res. Serv., U.S. Dep. Agric., Fort Lauderdale, FL 33314
Richard D. Conant Jr.
Affiliation:
Aquatic Plant Management Lab., Agric. Res. Serv., U.S. Dep. Agric., Fort Lauderdale, FL 33314
Get access Rights & Permissions [Opens in a new window]

Abstract

Control of monoecious and dioecious hydrilla [Hydrilla verticillata (L.f.) Royle # HYLLI] biotypes required a minimum 2 days of exposure to diquat (6,7-dihydrodipyrido [1,2-α:2′,1′-c] pyrazinediium ion) at a concentration of 0.25 mg/L under laboratory conditions. When treatment concentration was increased to 2.0 mg/L diquat, the minimum required contact time was reduced to 6 or 12 h depending on plant growth stage. Early growth emerging from sprouting tubers appeared to be more susceptible to diquat treatments. Herbicide uptake was linear during a 4-day exposure to 14C-diquat up to 1.0 mg/L, and the amounts of radioactivity in plant tissue varied proportionally with ambient levels of 14C-diquat in water. The lethal concentration of diquat in hydrilla tissue was estimated to be 81 μg/g plant dry weight when hydrilla was exposed to diquat at 0.25 mg/L for 2 days.

Keywords

Herbicide uptakebioconcentration factorlethal concentrationcontact timeaquatic weedHYLLI
Type
Weed Control and Herbicide Technolgy
Information
Weed Science , Volume 35 , Issue 2 , March 1987 , pp. 247 - 252
Copyright
Copyright © 1987 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. Anderson, L.W.J. 1981. Effect of light on the phytotoxicity of fluridone in American pondweed (Potamogeton nodosus) and sago pondweed (P. pectinatus). Weed Sci. 29:723–728.Google Scholar
2. Baker, G., Bitting, L. E., Lambert, P. A., McClintock, W. L., and Hogan, W. D. 1975. Improved application techniques for aquatic herbicides. J. Aquat. Plant Manage. 13:21–24.Google Scholar
3. Barrett, P.R.F. 1981. Diquat and sodium alginate for weed control in rivers. J. Aquat. Plant Manage. 19:51–52.Google Scholar
4. Blackburn, R. D., Weldon, L. W., Yeo, R. R., and Taylor, T. M. 1969. Identification and distribution of certain similar-appearing submersed aquatic weeds in Florida. Hyacinth Control J. 8(1):17–21.Google Scholar
5. Cook, C.D.K. 1985. Range extensions of aquatic vascular plant species. J. Aquat. Plant Manage. 23:1–6.Google Scholar
6. Davies, P. J. and Seaman, D. E. 1968. Uptake and translocation of diquat. Weed Sci. 16:293–295.Google Scholar
7. Haller, W. T. and Sutton, D. L. 1973. Factors affecting the uptake of endothall-14C by hydrilla. Weed Sci. 21:441–448.Google Scholar
8. Hoagland, D. R. and Arnon, D. I. 1950. The water culture method for growing plants without soil. Univ. Calif. Agric. Exp. Stn. Circ. 347. 32 pp.Google Scholar
9. MacKenzie, J. W. and Hall, L. 1968. Elodea control in southeast Florida with diquat. Hyacinth Control J. 6:37–44.Google Scholar
10. Steward, K. K., Van, T. K., Carter, V., and Pieterse, A. H. 1984. Hydrilla invades Washington, D.C. and the Potomac River. Am. J. Bot. 71:162–163.CrossRefGoogle Scholar
11. Sutton, D. L., Haller, W. T., Steward, K. K., and Blackburn, R. D. 1972. Effect of copper on uptake of diquat-14C by hydrilla. Weed Sci. 20:581–583.Google Scholar
12. Van, T. K. and Steward, K. K. 1986. The use of controlled-release fluridone fibers for control of hydrilla (Hydrilla verticillata). Weed Sci. 34:70–76.Google Scholar
13. Verkleij, J.A.C., Pieterse, A. H., Horneman, G.J.T., and Torenbeck, M. 1983. A comparative study of the morphology and isoenzyme patterns of Hydrilla verticillata (L.F.) Royle. Aquat. Bot. 17:43–59.CrossRefGoogle Scholar