''Phytophthora syringae'' is an

oomycete Oomycota forms a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms, called oomycetes (). They are filamentous and heterotrophic, and can reproduce both sexually and asexually. Sexual reproduction of an oospore is the resul ...

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 ...

known to infect nursery plants, particularly

apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple trees are cultivated worldwide and are the most widely grown species in the genus '' Malus''. The tree originated in Central Asia, where its wild ancest ...

and

pear Pears are fruits produced and consumed around the world, growing on a tree and harvested in the Northern Hemisphere in late summer into October. The pear tree and shrub are a species of genus ''Pyrus'' , in the Family (biology), family Rosacea ...

trees.Laywisadkul, S., Fuchigami, L.H., Scagel, C.F., Linderman, R.G. Tree Growth Stage and Environment After Pathogen Inoculation Alters Susceptibility of Pear Trees to ''Phytophthora'' Canker. Open Horticulture Journal v3 (2010). It infects plants through wounded areas and is most pathogenic during cold, wet weather.

References

External links

Index Fungorum

USDA ARS Fungal Database
syringae Water mould plant pathogens and diseases Apple tree diseases Pear tree diseases {{plant-disease-stub