These species include apples, carrot, cherry laurel, cress, cucumber, garlic, lettuce, pea, rhododendron, and spinach.

[4] Additionally, oospores have been shown to occur only in specific pairings of certain sporangial isolates, a finding which reinforces its heterothallic nature.

[6] After a period of time biflagellate zoospores begin to develop within the protoplasm of the sporangium and are subsequently released during the proper conditions.

[3] The motile zoospores proliferate through the vector medium until they reach the infection court of its host, in this case the seed or the roots.

[3][6] After an oospore is formed as a result of the fusion between the aforementioned reproductive structures the pathogen continues to undergo cell division giving rise to the mycelium where both cycles repeat under the proper conditions.