Filtration to Eliminate <i>Phytophthora</i> spp. from Recirculating Water Systems in Commercial Nurseries

Fig. 4. Average volumes filtered during 2003-2006 by the four nurseries in the study (SSF = slow sand filtration, LGF = lava grain filtration). (A) Average annual volumes of filtered water produced by the four nurseries 2003-2006. (Data for SSF 3 estimated from irrigation intensity due to a technical defect in a measuring unit. Error bars show maximum and minimum volumes.) (B) Average monthly volumes of filtered water produced by SSF 1, SSF 2 and LGF 2003-2006. (Data for LGF not available for 2004 due to technical defect in the measuring unit. Error bars show maximum volumes.)



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Filtration to Eliminate Phytophthora spp. from Recirculating Water Systems in Commercial Nurseries