09/08/2026
Several maples (Acer spp.) especially noticeable on Norway maple (Acer platanoides) are infected with tar spot (Rhytisma spp.) and anthracnose, there are several fungal pathogens that may be responsible. The anthracnose is causing the browning of the leaves and contributing to significant early leaf drop. The combination of the two infections is not typically fatal, but the visual impact has raised concerns and will likely impact fall color.
Excerpt from our September 4 Landscape Message β East Region Report
https://www.umass.edu/agriculture-food-environment/landscape/landscape-message-september-4-2026
The LANDSCAPE MESSAGE is a regular update to inform and help guide land care professionals in the management of our collective landscape.
Each edition includes valuable information from sites throughout Massachusetts, including growing degree day accumulation, soil temperature, precipitation amounts, and plant phenology. Detailed reports on cultural practices and the status of insects, diseases, and weeds of interest to landscapers, arborists and turf managers are also regular features.
Photo: Tar spot (Rhytisma spp.) and anthracnose by Kit Ganshaw
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