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ISHS Acta Horticulturae 1140: Proceedings of the 2015 Annual Meeting of the International Plant Propagators' Society

Slow sand filters: a biological treatment method to remove plant pathogens from nursery runoff©

Authors:   L.R. Oki, L.L. Nackley, B. Pitton
DOI:   10.17660/ActaHortic.2016.1140.30
Abstract:
Slow sand filters (SSF) are an effective technology, capable of developing high-quality water from untreated sources including irrigation runoff. The sand serves as a substrate on which a microorganism community grows. This microbial community can breakdown a wide range of pollutants including plant pathogens. This report reviews results on the removal of Phytophthora spp., Fusarium oxysporum, and tobacco mosaic virus. We were interested in the capacity of these filters to remove different kinds of plant pathogens from captured irrigation run off. Our experiments removed P. capsici after the microbial community was established (2 weeks) and after a simulated 7-day pump failure in previously established SSFs. However, SSFs did not remove F. oxysporum after 7 weeks. In our tests, the SSFs were also able to remove tobacco mosaic virus from inoculated runoff water after 6 to 9 weeks of exposure.

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1140_29     1140     1140_31

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