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Depression of Carbohydrate in Marine Algae by Urea Herbicides

Published online by Cambridge University Press:  12 June 2017

Gerald E. Walsh  and
Thomas E. Grow
Gerald E. Walsh
Affiliation:
Gulf Breeze Laboratory, Pesticides Office, Environmental Protection Agency, Sabine Island, Gulf Breeze, Florida 32561
Thomas E. Grow
Affiliation:
Gulf Breeze Laboratory, Pesticides Office, Environmental Protection Agency, Sabine Island, Gulf Breeze, Florida 32561
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Abstract

Representative species of six genera of marine unicellular algae (Chlorococcum sp., Dicrateria inornata Parke, Dunaliella tertiolecta Butcher, Nannochloris sp., Isochrysis galbana Parke, and Monochrysis lutheri Droop) were treated in unialgal culture with 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron), 1-butyl-3-(3,4-dichlorophenyl)-1-methylurea (neburon), 3-(p-chlorophenyl)-1,1-dimethylurea (monuron), and 1,1-dimethyl-3-phenylurea (fenuron). Tests were conducted at salinities of 5, 10, 20, and 30 parts per thousand (ppt). The herbicides depressed concentration of carbohydrate in all species. Dunaliella tertiolecta was most resistant; its carbohydrate content decreased 9.2% at 5 ppt salinity and 17.9% at 30 ppt. Chlorococcum was most susceptible; its carbohydrate content decreased 49.1% at 5 ppt and 65.6% at 30 ppt salinity.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 5 , September 1971 , pp. 568 - 570
Copyright
Copyright © Weed Science Society of America 

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References

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