Herbicides
How to effectively use herbicides for Minnesota crop production
- 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.
- Herbicide mode of action and sugarbeet injury symptoms — An in-depth look at eight herbicide families, their modes of action, factors that influence their effectiveness and injury symptoms.
Applying herbicides
- Diversification strategies and crop rotation intervals for corn and soybean herbicides — Herbicide rotation intervals and diversification strategies for corn and soybeans, 2021.
- Herbicide-resistant traits in Minnesota and North Dakota — 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.
Off-target dicamba movement
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.
- Understanding dicamba’s wayward ways
- Symptoms of dicamba exposure in soybean
- Effect of dicamba exposure on yield
- Dicamba Frequently Asked Questions (MDA) — Up-to-date resource and general information
- Minnesota-specific requirements: Dicamba training and use (MDA)
Spray drift
- How to avoid pesticide drift — Strategies for nozzle selection, buffer zones, and wind speeds. Legal implications. How to report issues.
- Herbicide spray drift demonstration (6:59; 2014) — This video shows the off-target movement of glyphosate in oat plots using six nozzle types with droplet sizes ranging from fine to ultra-coarse.
- Why temperature inversions are important (3:07; 2017) — This video 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. Look at current and predicted wind speed and rainfall conditions when deciding to spray.
Minnesota Crop News
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