The Royal Horticultural Society explains: "Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of dead ...

Q: I came back from vacation and my Gala apple tree branch ... under the bark. I’m hoping it’s not damaged from fire blight. A: It looks like an older fire blight disease is now in the trunk ...

These diseases can disfigure the leaves and the fruit, reduce the yield, and weaken or kill the tree over time. The best way to combat them is to choose an apple variety that has been bred to ...

Discover the major common tree diseases in the United States. Armillaria attacks both hardwoods and softwoods and causes either yellowing leaves or browning needles. Wood that is decaying from ...

Gardeners with apple or pear trees are being warned to check them in January for a potentially deadly disease. Alan Buckingham, author of Allotment Month By Month, advises in the January section ...

The list of diseases attacking trees in the Pacific Northwest grows every year. A pathogen new to Pierce County brings an added concern: It can injure people. A research project using citizen ...