Fig 5. Morphological structures of Phytophthora crassamura formed on V8 Agar; a-h.

Sporangia produced in nonsterile soil extract water; a. Mature non-papillate, obpyriform, persistent sporangium with an external proliferation just below the base of the sporangium; b-d. Sporangia showing direct germination of sporangiophores; e. Ovoid sporangium releasing individual zoospores; f. Empty sporangium with nested and extended proliferation; g. Sporangium with internal proliferation and intercalary hyphal swelling close to the base; h. Internal extended proliferation; i-m. Mature oogonia with aplerotic and thick-walled oospores; i-j. Oogonia with amphigynous antheridia; k-m. Oogonia with paragynous antheridia; l-m. Aborted oospores with extremely thick wall. Scale bar = 20μm.