A walk-behind propane flame weeder at the UMN Southern Research and Outreach Center . Photo: Annie Klodd Authors: Charlie Rohwer and Annie Klodd. Flame weeders can be a helpful addition to an integrated weed management program in many vegetable and fruit crops. We discuss how a walk-behind propane flame weeder is used at the University of Minnesota Southern Research and Outreach Center (SROC) in Waseca, and how growers can incorporate flaming into their own operations. Uses and advantages of flame weeding Flame weeding is a "thermal" technique that works by killing weeds with heat (not fire). Cell membrane function is disrupted by the heat, either killing the weed or restricting its ability to compete. Multiple models and types are available to fit the scale of the operation, from backpack single-torch models to multi-burner or even tractor-mounted implements. Flaming is a relatively non-disruptive tool that is organically approved, does not necessitate herbicide...
