This Agar medium can be used for the cultivation of Phytophthora infestans. It is particularly suitable for long term maintenaince of Phytophthora on plate.To induce sporulation Rye B agar is recommended.This protocal has been copied from http:\/\/www.plantpath.cornell.edu\/Fry\/Original reference: Caten, C. E. and J. L. Jinks. 1968. Spontaneous variability of single isolates of Phytophthora infestans. I. Cultural variation. Can. J. Bot. 46: 329-348.