(Funding: NNYADP). This on-farm research trial will evaluate several pre- and post-emergence herbicide programs to address the new problem of glyphosate resistant marestail weed outbreaks, particularly in soybeans. The development and evaluation of several herbicide programs will help NNY soybean growers make informed decisions about their weed control systems, while reducing the likeliness of specific herbicide resistant weed species. Collaborators include: Mike Hunter, Kitty O'Neil, Bryan Brown, NYS IPM.