The treatments were made in a glasshouse at 20 - 22oC
and 13 h day length. Clay pots of 12 cm diameter were filled
with 600 g autoclaved soil. Seed tubers cv. Nadejda used in
all tests. Each pot contained one-potato seedling inoculated
with 30 cysts of G. rostochiensis (put in muslin bags) poured
in the root zone of the plants. They were irrigated to maintain
optimum moisture level.