Published on Friday, June 3, 2016
By this point in the season, farmers are looking to control weeds that have emerged following a break in residual activity. When making a weed control plan, there are several things to keep in mind. Check out the video below to learn more.
Weed Identification is Important
Weeds of concern this season include
Controlling Weeds During Critical Periods For soybeans, the critical period of weed control lasts from V1 until R1. Not controlling weeds during this time period can result in a decrease of 5 percent or more in yield. For this reason, we suggest farmers control weeds at a height of 6 in. or less. By controlling weeds early, you increase the effectiveness of your herbicides and decrease the impact weeds will have on yield. Herbicide Options Based on Weed Populations In the state of Ohio, if marestail is present then glyphosate and ALS resistance is assumed. In the case of giant ragweed, there is also the possibility of glyphosate and ALS resistance. Remember, resistance can limit your herbicide options. If you are experiencing problems with these weeds, you may want to consider one of the options in the chart below.
Don’t hesitate to reach out with any questions or concerns regarding weeds in your fields.
Author: Alex Knight
Categories: PFR, PFR Reports
Tags: soybeans, Practical Farm Research, Agronomy, Giant Ragweed, Marestail, Ohio Agronomy, PFR, PFR Report, Alexandra Knight, Post weed control, common lambsquarter, herbicides