A Missouri farmer found waterhemp resistant to 2,4-D in his field and it turned out to be resistant to a half-dozen modes of action. University of Missouri Weed scientist Dr. Kevin Bradley tells Brownfield Ag News, “Through several years of field and greenhouse and lab work we were able to confirm that this particular population is resistant to six different classes of herbicides.”
Before this Missouri discovery, waterhemp had only displayed resistance to 2,4-D in Illinois and Nebraska.
Continue reading MU weed scientist confirms six-mode resistant waterhemp at Brownfield Ag News.
