There are currently 400 unique cases
(species x site of action) of herbicide resistant weeds globally, with 217 species
(129 dicots and 88 monocots). Weeds have evolved resistance to 21 of the 25 known herbicide sites of action and to 148 different herbicides
. Herbicide resistant weeds have been reported in 65 crops in 61 countries
. There are 1627 registered users of this website and 404 weed scientists have contributed new cases of herbicide resistant weeds. To see a list of the most recent additions to the site Click Here.