Phytophthora cryptogea

Phytophthora cryptogea is a species of water mould in the family Pythiaceae. It is a plant pathogen that infects several species of cultivated plants, including over 40 species of cultivated flowers. This species is reported to be pathogenic on grandiflora petunia (Petunia × atkinsiana). It causes root rot, shoot rot and shanking in tulips. It also infects blue daze (Evolvulus glomeratus), dusty miller (Jacobaea maritima), Barberton daisy (Gerbera jamesonii), and garden verbena (Verbena × hybrida). Like its relative Phytophtora cambivora, it can cause ink disease of chestnuts (Castanea sativa). This and Phytophthora drechsleri have been considered the same species, but phylogenetic analysis has revealed that they are two distinct species.