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 ...

University of Alberta research provides new insight into how harmful fungal infections could affect the ability of lodgepole pines to defend themselves from deadly mountain pine beetle attacks. Using ...

Q: How can I protect my landscape trees from fungal infection? I’ve heard that a large, seemingly healthy tree can just suddenly drop a major limb or just break in half without any outward sign of ...

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 ...