Leaf Diseases on Broadleaf Trees - Rampant but Mostly Harmless
You may have observed a major difference between this year and our last few growing seasons: plenty of precipitation. According to the DNR's Climatology Office, the amount of rain that's fallen from April through August 2024 has been nearly the most on record over a good share of Minnesota. Overall, this is good news for our forests – but all that near- historic rainfall has had additional impacts to trees.
As shoots and leaves emerge in the spring, they're particularly susceptible to infection from fungal pathogens. Extremely wet weather during this timeframe promotes sporulation (formation of spores) of these microscopic fungi, and rain spreads the spores around. The end result is a slew of common leaf diseases that we've seen in 2024.
Read the full article from the MNDNR or contact Becky Wozney, Wetland Specialist, at
