Some cherry and plum trees in the central Ohio area are turning black from a fungal disease. Here's what you need to know.

Black knot, a fungal disease, is affecting cherry and plum trees in the Greater Columbus area, likely due to recent wet weather. The disease causes hard, black knots on branches, disrupting growth ...

The fungus is also affecting cherry trees in Mill Park, Calumet Park and other places, which will also be cut down. Experts say the fungus can also harm plum trees.

If your plum tree is bleeding sap, it may be affected by canker, or by other forms of fungal or bacterial diseases, like pseudomonas.

Question: Please help! I just noticed that my wild plum tree in my backyard has some sort of fungus growing on it. Is there anything I can do, or is it diseased beyond repair? It was healthy this ...

A: Your plum tree has black knot fungus. At this point, there is nothing you can do about it except to prune out the affected limbs. This may remove most of the tree, and it likely won’t produce ...

The most common plum tree diseases include black knot, plum pocket, brown rot, plum pox virus, perennial canker, and bacterial leaf spot. Control of black knot requires both prevention and sanitation.

The black “crustaceans” on your plum tree are galls, caused by the black knot fungus. The disease also attacks cherry trees but tends to be more damaging to plums. The fungus enters young twigs, ...

If you have cherry or plum trees, now's a good time to check for a disease called black knot fungus. The fungus can go unnoticed with summer foliage but is apparent when trees are winter-bare.

Heavy infestations of aphids can also slow tree growth, reduce fruit size and reduce fruit sugar content. The leaf curl plum aphid overwinters as eggs deposited near the base of buds.