G.L. Graham and R.J.A. Tremblay
Abstract: An aggressive weed species in cranberry production is creeping buttercup, which readily grows along bed
edges and drainage ditches, reducing yields. Mesotrione is currently labelled for suppression of creeping buttercup.
Another product, chlorimuron–ethyl, has shown good potential for use in cranberry, with activity on creeping
buttercup. A trial was initiated near Maugerville, New Brunswick in an established cranberry bed. Slight injury was
detected early from chlorimuron–ethyl treatment, although the application timing may have been later than
recommended. Chlorimuron–ethyl controlled the weed spectrum tested within the trial, while mesotrione
suppressed the population. The tank mixes evaluated did not change crop injury or weed control ratings. The effect of
repeated mesotrione applications or early chlorimuron–ethyl followed by late mesotrione should be evaluated to
determine if additional weed control is gained from repeated applications.