Getting in the fields for soybean harvest is stressful enough, with servicing equipment (and navigating inevitable breakdowns), coordinating drivers and getting beans in the bin amid unpredictable fall weather conditions. Your to-do list is already a mile long, but make sure you don’t skip pre-harvest scouting of soybeans in the field. Here’s how a few extra minutes in the field prior to soybean harvest can optimize harvest timing, help you evaluate whether desiccation might improve grain quality and lay a solid management foundation for the next growing season.
Identify late-season disease of soybeans in the field
Begin your pre-harvest scouting by looking for pathogens such as white mold or sudden death syndrome (SDS). Areas of unexplained low yield, stunted crops and early yellowing can all be indicators of a problem.
Prioritize which fields should be harvested earlier, which can wait until later in the season and whether additional action is needed to mitigate yield loss.
Also be vigilant for soybean cyst nematode identification (SCN) in October, which is SCN Awareness Month. Because SCN often shows no above-ground symptoms even as it steals up to 30% of your yield, it’s a good idea to prioritize known hot spots for SCN soil sampling immediately after harvest.¹
Monitor late-season pod-feeding pests at soybean harvest time
Scout for stink bugs and bean leaf beetles. It’s especially important to manage these pests from beginning seed stage (R5) to full seed (R6). This will help you protect seed quality and prevent reduced market value of your crop.
To evaluate stink-bug pressure levels, conduct 10 sweeps with a net in 10 different parts of your field. These pests tend to congregate at field edges, though they can also live in the interior. If you find more than four per set of 10 sweeps, treatment can help cut pest levels roughly in half.²
For bean leaf beetles, aim for 20 sweeps in four field locations. If you find between 70 and 100 beetles across all of those sweeps, treatment might help.³
Analyze late-season soybean nutrient deficiencies
Look for foliar symptoms of nutrient deficiencies to diagnose potential stressors such as a lack of potassium or sulfur.
Potassium problems can show up as older leaves with burned edges and spotted areas, while sulfur deficiency typically shows up as yellowing in younger leaves.⁴
You can then adjust soil nutrient levels as much as possible. Then, conduct soil tests to understand ways to improve fertility for next season.
Evaluate strategic desiccation and harvest timing
If you need to get soybeans ready for harvest out of the field earlier than normal, a desiccant can assist drydown, enabling harvest between three and 15 days early depending on your location.⁵
Application is best at R7 to avoid damaging seed quality and yield.
Don’t put scouting on a back burner this year. Experts are available to help you get soybean pre-harvest scouting checked off the list. Reach out to your seed retailer, a nearby extension office agent or a seed company professional like your regional BASF representative.
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Endnotes
- Lopez-Nicora, Horacio, and Stephanie Karhoff. “Scouting Late-Season Soybean Diseases.” C.O.R.N. Newsletter, The Ohio State University, 2 Aug. 2022,https://agcrops.osu.edu/newsletter/corn-newsletter/2022-26/scouting-late-season-soybean-diseases. Accessed 14 May 2026.
- Michel, Andy, and Kelley Tilmon. “Late-Season Pod Feeding: Bean Leaf Beetle, Grasshopper, and Stink Bug.” C.O.R.N. Newsletter, The Ohio State University, 31 Aug. 2021,https://agcrops.osu.edu/newsletter/corn-newsletter/2021-30/late-season-pod-feeding-bean-leaf-beetle-grasshopper-and-stink. Accessed 14 May 2026.
- Varenhorst, Adam. “Monitor Soybean Bean Leaf Beetle Activity.” South Dakota State University Extension,https://extension.sdstate.edu/monitor-soybean-bean-leaf-beetle-activity. Accessed 14 May 2026.
- Jones, Clain. “Nutrient Deficiency and Toxicity.” Montana State University Extension,https://landresources.montana.edu/soilfertility/nutrientdeficiency.html. Accessed 14 May 2026.
- Kendall, Mark A., et al. “Harvest Aid Applied at Soybean Growth Stage R7 Rarely Impacted Seed, Protein, or Oil Yield.” Agronomy Journal, 27 June 2025,https://doi.org/10.1002/agj2.70109. Accessed 14 May 2026.
