Abstract
Although cyprofuram + folpet, SAN 371F, propamocarb and phosethyl Al controlled metalaxyl-sensitive strains of P. infestans and P. cubensis in potato [Solanum tuberosum ''Cropt''] and cucumbers [Cucumis sativus ''Bet-Alfa''] respectively, the fungicides failed to do so in plants inoculated with metalaxyl-resistant strains.