Published on Wednesday, September 8, 2021
Just as with corn and soybeans, we have developed five Practical Farm Research (PFR)® success strategies for weed management. Our PFR team has combined what we have learned from our studies to help you decide which practices you should try on your operation.
Power in the PRE™
PFR data shows that utilizing pre-emerge herbicides with multiple sites of action (SOAs) can potentially reduce the amount of pressure on post-emergence applications. By doing this, you’re protecting yield loss from early-season weed pressure, reducing selection pressure on post-emergence herbicides, and ultimately building the foundation for an effective herbicide program.
Utilizing Multiple SOAs
Utilizing herbicides with multiple SOAs combines the strengths and weaknesses of various actives, creating a stronger and more stable weed control.
When an in-season residual is applied, there is potential for an additional 28 days of protection. Another 28 days of protection will hopefully provide enough time for canopy closure, which in return reduces the number of late-season escapes.
Making the Most of Your Post-Emergence Application
It’s true that we have effective ways for controlling glyphosate-resistant weeds, but Beck’s PFR data shows that it’s the small details that have the most significant impact in relation to the post-emergence application.
When it comes to spraying weeds that are 4 inches in height or less, it’s important to remember that we must still spray weeds when they’re small to ensure the greatest efficacy. This increases the spray coverage and decreases the number of growing points available for weeds. Waiting to spray can result in weeds that are too large, causing poor performance and the promotion of resistant weeds.
Integrated Pest Management
A. Row Spacing
Finding alternative, non-chemical ways to reduce the amount of weed pressure can sequentially lessen the number of weeds that the pre-emergence and post-emergence applications will be responsible for controlling.
PFR data indicates that shallower tillage and no-till are influential in soil management. It was also found that weed seed size and tillage depth can ultimately impact weed pressure. Three SOAs resulted in effective waterhemp control across tillage and no-till programs.
C. Cover Crops
Although they require a system approach, it has been found that cover crops can reduce weed pressure. In high biomass scenarios, not all Group 15 herbicides responded in the same way.
Author: Kate Roth
Tags: Practical Farm Research, PFR, weed management