Both are caused by fungi, but they are not spreading between these two trees; serviceberries don’t get black knot and plums ...

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 and ...

Winter is here and yet we’re still getting plenty of gardening questions to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. OSU Extension faculty ...

Our often-wet springs bring with them the perfect conditions for many plant diseases. While moist weather can create conditions for diseases on many plants, sick trees in the landscape tend to draw ...

A common fungal disease of cherry and plum trees is widespread in Greater Columbus, likely worsened by the abnormally wet conditions experienced locally both this spring and last spring. Black knot, ...