HARRISBURG, PA. -- Thousand Cankers Disease has been detected for the first time in Pennsylvania, and a quarantine restricting the movement of wood from Bucks County and other states known to have the ...

Q: I don't know what this is on my oak tree, but is it anything I should be concerned about (see reader's photo)? Should I spray with something? A: Unfortunately, I suspect your tree has hypoxylon ...

European canker, caused by the fungal pathogen Neonectria ditissima, presents a significant challenge to apple production across temperate regions. The disease manifests as cankers on trunks and ...

Gardeners, this week we are discussing Asian Citrus Greening and Citrus Canker and how we can recognize each of the two citrus diseases. There are numerous plant diseases that may attack citrus trees, ...

Q: I have some questions about a willow tree disease. A customer purchased some golden willows from us. Since planting them, he has found some glossy black patches on the bark. The patches were not ...

We saw some dieback in trees coming out of winter. In some cases, it is environmental stress from drought stress and winter temperature extremes. It may also be a canker disease. Cankers infect trunks ...

When I started my horticultural career in New Orleans back in 1980, my memory of growing citrus seems so easy. White flies and other sucking insects and the sooty mold they caused were the only major ...