Back in March, regional weed extension professionals discussed creating a visual aide chart for herbicide selection for the big three problematic weeds (palmer amaranth, common ragweed and marestail) in corn and soybean.
Below are two url links to “A Spray Tank’s Last Checklist in Soybean“; and “A Spray Tank’s Last Checklist in Corn” courtesy of Mark VanGessel, Extension Weed Specialist, University of Delaware Research and Education Center.
Note, these are not meant to replace anything extension has available already, rather to supplement and be coupled with herbicide resistance charts in the Agronomy Guide and the 2021 Mid-Atlantic Field Crop Weed Management Guide noted in this MARCH 5, 2021 post by Thierry Besancon, Rutgers Extension Weed Specialist
These supplemental charts are meant to be used as the spray tank is being filled, to ensure the right products are in the tank – thus the title “Last Check Chart”. These are not meant to be comprehensive for all herbicides and weeds, rather what extension weed experts in our region are recommending for the BIG 3 in corn and soybean. Always refer to the individual product label for weed and crop height and growth stage restrictions.
Ultimately plans are to have a wall-chart that can be distributed next extension season.
Soybean: http://www.udel.edu/008288
Corn: http://www.udel.edu/008287
