All in-person Extension meetings, events and classes are canceled through Friday, May 15.
Find guidance on how to effectively use herbicides for Minnesota crop production.
Herbicide fact sheets and classifications
Technical data on herbicides recommended for use in Minnesota, including restrictions on feeding, grazing, crop stage, harvest and rotations.
Herbicide classification poster
Groups herbicides by sites of action to help you maintain greater herbicide diversity and delay the development of resistance. Developed by Take Action: Herbicide-Resistance Management.
An in depth look at eight herbicide families, their modes of action, factors that influence their effectiveness and injury symptoms:
- Application timing
- Herbicide selectivity
- Herbicide uptake and translocation
- Injury symptoms in sugarbeet
Diversification strategies and crop rotation intervals for corn and soybean herbicides
Number of months between corn and soybean herbicide applications and the following crop for herbicides included in the diversification strategies.
Herbicide resistant traits in Minnesota and North Dakota
Herbicide resistance traits create additional weed options for crops, but can also cause confusion around which herbicides can be applied safely and legally. This guide clarifies which herbicides can be applied to various trait packages for our major crops.
How to calculate herbicide rates and calibrate herbicide applicators
Calculations for determining how much herbicide you need, plus calibration how-tos for sprayers and granule applicators.
Managing risk when using herbicides and cover crops
How to successfully use herbicides when incorporating cover crops into corn and soybean systems: Research on sensitivity to herbicide carryover and weed-control strategies.
In 2017, low volatility formulations of dicamba were released for use with dicamba-tolerant soybean. Non-tolerant soybeans are extremely sensitive to this chemical.
Despite the new formulations, dicamba injury to non-target soybeans was widely reported in Minnesota and several other states.
Strategies for nozzle selection, buffer zones, wind speeds and more.
How to report issues.
Herbicide spray drift demonstration
Shows off-target movement of glyphosate in oat plots using six nozzle types with droplet sizes ranging from fine to ultra coarse.
Why are temperature inversions important
Addresses what temperature inversions are, when they occur, how to know if they’re occurring and why they’re important when deciding if it’s the right time to spray. When making the decision, look at current and predicted wind speed and rainfall conditions.