Long-term algal control in a reservoir using barley straw
Populations of cyanobacteria, diatoms and unicellular green algae in a potable supply reservoir have been suppressed continuously since 1993 by repeated treatments of barley straw. Algal cell numbers dropped soon after the straw was introduced and have remained at approximately one quarter of those recorded prior to treatment. All types of algae, including diatoms and cyanobacteria, have been uniformly affected and no new or resistant species have developed. Taint and odour problems in the potable water have been reduced and filters at the water treatment works require less frequent cleaning.
Key wordsAlgal control barley straw cyanobacteria diatoms
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- Barrett, P. R. F., 1994. Field and laboratory experiments on the effects of barley straw on algae. BCPC Monograph No. 59: Corn-paring glasshouse and field pesticide performance ii: 191–200.Google Scholar
- Barrett, P. R. F. & J. R. Newman, 1992. Control of algae. Progress Report, Aquatic Weeds Research Unit, Broadmoor Lane, Sonning, Reading, RG4 0TH. U.K.Google Scholar
- Everall, N. C. & D. R. Lees, 1996. The use of barley straw to control general and blue-green algal growth in a Derbyshire reservoir. Wat. Res. 30: 269–276.Google Scholar
- Gibson, M. T. & P. R. F. Barrett, 1989. Terbutryn resistance in Vaucheria dichotoma. J. Appl. Phycol. 1: 167–170.Google Scholar
- Harriman, R., E. A. Adamson, R. G. J. Shelton & G. Moffett, 1997. An assessment of the effectiveness of straw as an algal inhibitor in an upland Scottish loch. Biocontrol Sci. Technol. 7: 287–296.Google Scholar
- Newman, J. R. & P. R. F. Barrett, 1993. Control of Microcvstis aeruginosa by decomposing barley straw. J. Aquat. Plant Mgmt. 31: 203–206.Google Scholar