Abstract
The osmotic potential of the agar medium exerted some effect on oospore germination of Phytophthora vignae irrespective of the solute used for osmotic potential control (KCl, NaCl, glucose and mannose). Few oospores germinated at -3.0 bars. Decline in osmotic potential did not increase the latent period of oospore germination. The terminal sporangium was produced on the germ tube developed through oogonial stalk when solutes other than glucose were used.
