Yellowing Leaves in Spring: Apple Scab Fungus vs. Anthracnose
Are your tree’s leaves turning yellow and falling off way too early?
In this video, Certified Arborists Jenn DiGiovanni and Meaghan Mays from Tree Green break down the crucial differences between two common tree diseases:
Apple Scab Fungus and Anthracnose.
If you have a Crabapple, Ash, Sycamore, Oak, or Maple tree losing its leaves during the spring or summer, knowing the exact cause is the first step to saving it. We show you exactly what to look for—from the black and brown lesions of Apple Scab to the rapid, spotted yellowing of Anthracnose—and explain why these two fungal conditions require completely different treatment plans.
What You Will Learn
- How to identify Apple Scab Fungus (and why it causes 80-90% leaf drop).
- How to identify Anthracnose across different tree species (Crabapple, Ash, and Sycamore).
- The 4 main reasons why Apple Scab treatments don’t stop Anthracnose.
- Why Anthracnose leaf drop stops after a few days, while Apple Scab persists into the Fall.
- Proof of treatment: A side-by-side comparison of a treated vs. untreated Crabapple tree.
Since 1970, our family-owned business has specialized in diagnosing and treating insect, fungal, and environmental tree damage through our tree diagnosis services to keep your landscape looking stunning.
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