There are currently 407 unique cases
(species x site of action) of herbicide resistant weeds globally, with 221 species
(130 dicots and 91 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 66 crops in 61 countries
. There are 1761 registered users of this website and 415 weed scientists have contributed new cases of herbicide resistant weeds. To see a list of the most recent additions to the site Click Here.