Evaluation of Several Commercial Algicides for Control of Odor-producing Cyanobacteria

摘要

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).udThese compounds are also frequently encountered worldwideudin reservoirs and aqueducts used for municipal drinking water systems(Schrader et al. 2002). In this study, several algicides were evaluatedudusing a rapid bioassay to determine their effectiveness inudcontrolling the MIB-producing cyanobacteriumudOscillatoriaudperornataudfrom a west Mississippi catfish pond and the MIBproducingudPseudanabaenaudsp. (strain LW397) from LakeudWhitehurst, Virginia, used as a city water supply reservoir.udThe cyanobacteriumudOscillatoria agardhiiud, not a MIB-producer,udand the green algaudSelenastrum capricornutumud, found in catfishudponds in the southeastern United States, were includedudin the bioassay to help determine potential broad-spectrumudtoxicity of the commercial products. (PDF has 3 pages.)