Pests
Timely Insights on Pests
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July 1, 2025Content Author
With reports of tar spot already showing up in some corn fields this growing season—combined with the wetter conditions over the past couple of weeks—a common question is: when is the right time to pull the trigger on spraying a foliar fungicide?
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July 1, 2025Content Author
With reports of tar spot already showing up in some corn fields this growing season—combined with the wetter conditions over the past couple of weeks—a common question is: when is the right time to pull the trigger on spraying a foliar fungicide?
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June 27, 2025Content Author
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June 24, 2025Content Author
Finding the first Japanese beetle each June is a point of pride for some, including folks in my lab. They found adults in corn this week. Hurrah!? Checking the accumulating degree days for 2025 confirms they should be emerging all throughout Iowa. They need about 1,030 growing degree days (base 50°F) to complete development and will continue emergence until around 2,150 degree days.
