Tolerance of Carrots and Parsnips to Dual Magnum and Outlook Herbicides (2006)

Report to the Oregon Processed Vegetable Commission

Ed Peachey and Bob McReynolds
OSU Dept. of Horticulture


  1. compare crop tolerance of carrots and parsnips to two soil and early postemergent herbicides. Dual Magnum (s-metolachlor) was recently registered for use on root crops, but provides poor control of hairy nightshade, and loses effectiveness if rainfall is excessive after application.