1. Phytophthora

noun. destructive parasitic fungi causing brown rot in plants.


  • Phytophthora citrophthora
  • family Pythiaceae
  • Phytophthora infestans
  • fungus genus
  • Pythiaceae

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Sentences with phytophthora

1. Noun, plural
Leaves infected by phytophthora root rot will appear drought-stressed and can die quickly in warm weather.

2. Noun, singular or mass
Also called brown rot and collar rot, this fungus occurs when a phytophthora fungus is in your soil.

3. Adjective
Cleveland pear trees infected with phytophthora root rot can survive several years before the disease kills it.

4. Preposition or subordinating conjunction
Phytophthora (phytophthora parasitica) root and crown rot are soil-borne organisms and are common problems affecting bedding plants such as the petunia.