Marestail (Horseweed) Control in Peanuts Peanut Notes No. 57 2019
Options for marestail (horseweed) are limited in peanut after peanut emergence. Strongarm is most likely our best option and can be applied POST as long as peanuts are cracking. Like dogfennel, controlling marestail before peanuts emerge is extremely important. Options are much more limited in effectiveness after peanuts begin to emerge. Liberty is a very good option on marestail, but peanuts absolutely need to be below ground or in the seed bag if Liberty is applied.