File photo of palmer amaranth — the taller yellowish plants — infesting a U.S. cotton field. (Photo courtesy ARS/USDA)

Palmer amaranth pops back up in Ontario

Weed infamous in U.S. for multiple herbicide resistances

A single plant that showed up this summer on the edge of a southwestern Ontario cornfield is cause for concern among Canadian farmers, weed specialists warn. Writing Monday in the ag ministry’s Field Crop News, Ontario provincial weed management specialist Mike Cowbrough said the plant in question, found in Wellington County, is confirmed as palmer […] Read more