Definition of Phytophthora in US English:

Phytophthora

noun

Mycology
  • A genus of oomycete fungi (order Peronosporales) including many plant pathogens, typically causing root, collar, and fruit rots; (also phytophthora) a fungus of this genus, especially Phytophthora infestans, the cause of potato blight.

Origin

Late 19th century. From scientific Latin Phytophthora, genus name from phyto- + ancient Greek ϕθορά destruction.

Pronunciation

Phytophthora

/fʌɪˈtɒfθ(ə)rə/