| Species | Assay type | Reference |
| P. citricola | Conventional | Schubert et al. 1999. (Forest Pathology 29:169-188) |
| Real time | Böhm et al. 1999. (Journal of Phytopathology 147:409-416) |
| P. citrophthora | Real time | Schena et al. 2004. (Phytopathol. Mediterr. 43:273-280) |
| | Ippolito et al. 2004 (European Journal of Plant Pathology 110:833-843) |
| P. erythroseptica | Real time | Cullen et al. 2007. (Journal of Phytopathology 155:309-315) |
| P. fragariae | Conventional | Bonants et al. 1997. (European Journal of Plant Pathology 103:345-355) |
| Real time | Bonants et al. 2004. (European Journal of Plant Pathology 110:689-702) |
| P. fragariae rubi | Conventional | Stammler et al. 1993 (J of Plant Disease and Protection 100:394-400) |
| P. infestans | Conventional | Tooley et al. 1997 (Appl Environ Microbiol. 63:1467-1475) |
| | Hussain et al. 2005 (Plant Pathology 54:373-382) |
| P. lateralis | Conventional | Winton and Hansen, 2001. (Forest Pathology 31:275-283) |
| P. medicaginis | Conventional | Liew et al. 1998. (Mycological Research 102:73-80) |
| P. nicotianae | Conventional | Grote et al. 2002 (European Journal of Plant Pathology 108:197-207) |
| Real time | Schena et al. 2004. (Phytopathol. Mediterr. 43:273-280) |
| | Ippolito et al. 2004 (European Journal of Plant Pathology 110:833-843) |
| P. ramorum | Conventional | Garbelotto et al. 2002 (USDA Forest Service, Gen. Tech. PSW-GTR-18) |
| Real time | Hayden et al. 2004 (Phytopathology 94:1075-1083) |
| | Hayden et al. 2006 (Phytopathology 96:846-854) |
| | Hughes et al. 2006 (Phytopathology 96:975-981) |
| | Bilodeau et al. 2007 (Phytopathology 96:336-345) |
| | Tomlinson et al. 2007 (Applied and environmental microbiology. 73:4040-4047) |
| Multiple spp. | PCR-ELISA | Bailey et al. 2002 (FEMS Microbiol. Lett. 207:153-158) |
| Genus-specific | Conventional | Drenth et al. 2006 (Aust. Plant Pathology 35:147-159) |
| Primers | Real time | Kox et al. 2007 (Phytopathology 97:1119-1129) a
a When tested against 13 Pythium spp., 5 of them had a positive response |
