Absolute number of resistant weed species in the Czech list is relatively high (16) but majority of species are those resistant to PS II inhibitors, especially triazines which were used historically in orchards, maize and on railways in seventies and eighties in the last century. The status of resistance in listed populations has not been revised since the year of publication. We assume that the resistance is disappearing because triazines and other PS II inhibitors (except for terbuthylazine) are no longer used in these crops.