Hostname: page-component-848d4c4894-8kt4b Total loading time: 0 Render date: 2024-06-13T19:59:25.757Z Has data issue: false hasContentIssue false
  • English
  • Français

The Sensitivity of Duckweeds (Lemnaceae) and Azolla to Diquat and Paraquat

Published online by Cambridge University Press:  12 June 2017

R. D. Blackburn  and
L. W. Weldon
R. D. Blackburn
Affiliation:
Agricultural Research Service, U.S. Department of Agriculture, Fort Lauderdale, Florida
L. W. Weldon
Affiliation:
Agricultural Research Service, U.S. Department of Agriculture, Fort Lauderdale, Florida
Get access

Abstract

The sensitivity of giant duckweed (Spirodela polyrhyza (L.) Schleid), common duckweed (Lemna minor L.), Wolffiella floridana (Smith) Thomp., azolla (Azolla caroliniana Willd.), and watermeal (Wolffia columbiana Karst.) to diquat (6, 7-dihydrodipyrido [1,2-a:2’,1′-c] pyrazidiinium salt) and paraquat (1,1′-dimethyl-4,4′-bipyridinium salt) was in that order (most to least sensitive). The rapidity of chlorosis in giant duckweed was directly related to the light intensity. The light quality having the most effect on the activity of diquat and paraquat on duckweed was red (600+ millimicrons), and green (510–560 millimicrons) had the least effect.

Type
Research Article
Information
Weeds , Volume 13 , Issue 2 , April 1965 , pp. 147 - 149
Copyright
Copyright © 1965 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. Blackburn, R. D. and Weldon, L. W. 1963. Results of three years of testing diquat as an aquatic herbicide in Florida Proc. SWC 16:365.Google Scholar
2. Calderbank, A. 1960. Diquat: a new herbicide and desiccant Agr. Veter. Chem. J. 1:197–200.Google Scholar
3. Funderburk, H. H. and Lawrence, J. M. 1963. A sensitive method for determination of low concentrations of diquat and paraquat. Nature 199:1011–1012.Google Scholar
4. Homer, R. F., Mees, G. C. and Tompkinson, T. E. 1960. Mode of action of dipyridyl quaternary salts as herbicides. T. Sci Food Agr. 11:309–315.Google Scholar
5. Lawrence, J. M., Funderburk, H. H., Blackburn, R. D. and Beasley, P. G. 1962. Status of diquat and paraquat as aquatic herbicides. Proc. S.E. Assoc. Game & Fish Coram. 16:42–44.Google Scholar
6. Mees, G. C. 1960. Experiments on the herbicidal action of 1,1′-ethylene-2,2′-dipyridylium dibromide. Ann. Appl. Biol. 48:601–612.Google Scholar
7. Weldon, L. W. and Blackburn, R. D. 1963. Studies on the control of water lettuce. Proc. SWC 16:365.Google Scholar
8. Wilkinson, Robert E. 1963. Effects of light intensity and temperature on the growth of waterstargrass, coontail, and duckweed. Weeds 11:287–289.Google Scholar