Fall Application of Dual Magnum for Yellow Nutsedge Control in Muck Onions
Christy Hoepting, Extension Vegetable Specialist
Cornell Vegetable Program
September 14, 2011

Objectives:
1. To determine whether a fall application of Dual Magnum controls yellow nutsedge the
following spring in onions grown on muck soil in New York.
2. To determine onion tolerance to a fall application of Dual Magnum.
If applying Dual Magnum in the fall is effective at controlling yellow nutsedge in onions and does not cause an unreasonable amount of crop injury, we would like to pursue adding this use to the label in New York for onions grown on muck.
Trials were conducted in 2007-2008, 2008-2009 and in 2009-2010.
Fall Application of Dual Magnum for Yellow Nutsedge Control in Muck Onions (pdf; 1196KB)


Upcoming Events
Hudson Valley Orchard Weed Management Meeting

June 25, 2025 : Hudson Valley Orchard Weed Management Meeting
Poughkeepsie, NY
At this meeting, we will discuss previous research on using mulch for weed management, including the benefits of stacking mulch treatments with an organic herbicide program. We will then discuss the treatments in our field trial, discuss results to date, and get initial reactions from the grower, while viewing the field trial. We will then discuss the other study objective, using a mechanical weeding system to replace contact herbicide applications, currently underway in the Champlain Valley.