Evaluation of Several Commercial Algicides for Control of Odor-producing Cyanobacteria
2005
Schrader, Kevin K.
The production of certain odorous metabolites is an undesirable attribute of cyanobacteria (blue-green algae) growth in aquaculture ponds [e.g., channel catfish(Ictalurus punctatus)] and in drinking water reservoirs. The most common odorous compounds encountered in catfish aquaculture are geosmin (trans-1,10-dimethyltrans-9-decalol) and 2-methylisoborneol(exo-1,2,7,7-tetramethylbicyclo[2.2.1]heptan-2-ol).These compounds are also frequently encountered worldwidein reservoirs and aqueducts used for municipal drinking water systems(Schrader et al. 2002). In this study, several algicides were evaluatedusing a rapid bioassay to determine their effectiveness incontrolling the MIB-producing cyanobacteriumOscillatoriaperornatafrom a west Mississippi catfish pond and the MIBproducingPseudanabaenasp. (strain LW397) from LakeWhitehurst, Virginia, used as a city water supply reservoir.The cyanobacteriumOscillatoria agardhii, not a MIB-producer,and the green algaSelenastrum capricornutum, found in catfishponds in the southeastern United States, were includedin the bioassay to help determine potential broad-spectrumtoxicity of the commercial products. (PDF has 3 pages.)
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