The last survey of weeds populating fields in Ontario was conducted over 20 years ago by B. Frick and A.G. Thomas (1992). The purpose of this project was to identify weed species that occur in corn, soybean and winter wheat fields prior to herbicide application and to compare the most abundant weed species in 2014 to those identified in the Frick and Thomas survey.

Read the entire report here: A Survey of Weeds in Corn, Soybeans and Winter Wheat Across 6 Southwestern Ontario Counties