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

Objective:

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.