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

Fig. 7. Detection of Phytophthora spp. in clean water reservoirs in relation to protection from recontamination and the quality of water stored: (D) steel tank (right) covered.



Image from Plant Health Progress article:
Filtration to Eliminate Phytophthora spp. from Recirculating Water Systems in Commercial Nurseries