Laboratory and field investigations of a potential selective algicide, PH4062

Laboratory, greenhouse, and field studies were conducted to evaluate the algicidal activity of PH4062 super(2) (N-(4 cyclohexylphenol)-N super(1), N super(1)-diethylenediamine). One-time, 7-day exposure to PH4062 at 0.25 ppmw and above significantly reduced the growth of Cladophora glomerata) (L.) K...

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Bibliographic Details
Published in:Journal of aquatic plant management 1984-01, Vol.22, p.67-75
Main Authors: Anderson, L.W.J. (USDA, ARS, Aquatic Weed Control Research Laboratory, Botany Department, University of California, Davis), Dechoretz, N
Format: Article
Language:English
Subjects:
ACCION DE LOS PLAGUICIDAS
ACTION DES PESTICIDES
ALGAE
ALGICIDAS
ALGICIDE
ALGICIDES
CHARA
CHLOROPHYCEAE
CLADOPHORA GLOMERATA
DESHERBAGE
ESCARDA
FITOTOXICIDAD
Freshwater
INACTIVATION
PESTICIDE ACTIONS
PHYTOTOXICITE
PHYTOTOXICITY
RHIZOCLONIUM
WEED CONTROL
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Summary:Laboratory, greenhouse, and field studies were conducted to evaluate the algicidal activity of PH4062 super(2) (N-(4 cyclohexylphenol)-N super(1), N super(1)-diethylenediamine). One-time, 7-day exposure to PH4062 at 0.25 ppmw and above significantly reduced the growth of Cladophora glomerata) (L.) Kutz. and Rhizoclonium sp. Some combinations of copper sulfate (CuSO sub(4)) and PH4062 produced an additive, rather than synergistic effect. Growth of C. glomerata) and Rhizoclonium was reduced by 60 to 70%. Control of filamentous algae was obtained after exposure to PH4062 at 2.0 ppmw for 4 hours. Under field conditions, maximum control of filamentous algae was attained 7 days after treatment without any apparent effect on Chara sp., phytoplankton, or submersed vascular plants. Bioassays indicated that phytotoxicity of PH4062 persisted for about two days after treatment.
ISSN:0146-6623