Phytophthora cactorum var. applanataChester, (1932)
Phytophthora citricola is a plant pathogen. It was first described by Kaneyoshi (Kenkichi) Sawada in 1927 when it was isolated from orange trees in present-day Taiwan. It has since been found causing disease on a wide variety of plants.
^Sawada, K. 1927. Descriptive catalogue of the Formosan fungi III. Report of the Department of Agriculture Government Research Institute of Formosa. 27:1-62