Black knot is a fungal disease that disfigures certain flowering trees. Control the disease by pruning in February through March.
Q: I recently noticed a black, tar-like patch on my tree trunk, though it’s not tacky like actual tar. Are these insect eggs? Dried sap? Do I try to scrape it off? The tree has lichen but I don’t ...
STATEN ISLAND, N.Y. -- Have you ever noticed an abnormal growth on the trunk of a tree that looked rather tumorous -- all bumpy and wart-like? Examples can be seen on random trees just about anywhere.
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