This slide lists the most important herbicide resistant weed species in the world at this point in time. These weeds are included in this list because of the number of herbicides that they have developed resistance to and/or the speed at which they developed the resistance. It is interesting to note that most of these weeds produce large amounts of seed and have unique dispersal mechanisms. Also, two of the ten species in this list are in the genus Amaranthus.

Source: Dr. Ian Heap ( <BR>Worldwide<BR>