genus Phytophthora ge·nusp·hy·tophthora uncommon noun 1. destructive parasitic fungi causing brown rot in plants SynonymsPhytophthoragenus Phytophthora Related words Broader terms fungus genus Parts Pythiaceae Part of Phytophthora citrophthoraPhytophthora infestans WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
