Red "Lipstick" Rust on Crabapples
As I was strolling through the crabapple fields in Wooster at Secrest Arboretum, I began to notice that something was significantly different than the last time that I had evaluated the trees. Since I was evaluating the trees for apple scab, it suddenly struck me that I was also looking at a lot of polka-dot covered trees! What in the world was going on? As I looked closer at the foliage, the thing that stood out the most were the number of yellow-orange dots.
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