Evolution of weed species number resistant to auxinic herbicides 1957-2015
<a href="//commons.wikimedia.org/wiki/User:Spedona" title="User:Spedona">Spedona</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>  (données : The  International Survey of Herbicide Resistant Weeds)