''Pythium tracheiphilum'' is a

plant pathogen Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomy ...

infecting

lettuce Lettuce (''Lactuca sativa'') is an annual plant of the family Asteraceae. It is most often grown as a leaf vegetable, but sometimes for its stem and seeds. Lettuce is most often used for salads, although it is also seen in other kinds of foo ...

References

External links

Index Fungorum

USDA ARS Fungal Database
Water mould plant pathogens and diseases Lettuce diseases tracheiphilum {{plant-disease-stub