Apple tree defoliation
All the leaves on my apple tree have fallen off. I have had the tree for 20 years and this is the first time this has happened. Is this a statewide problem? Do you have any suggestions?
Baltimore County Maryland
It sounds like your tree has symptoms of apple scab, which, unfortunately, is a common fungal disease. If it is on an ornamental crab apple tree, we don't recommend any treatment other than raking up and disposing of the fallen leaves and pruning the tree for better air circulation. https://extension.umd.edu/hgic/scab-apples-trees
If your tree is for edible apple fruits, you will need to follow a spray schedule to control scab disease. https://extension.umd.edu/growit/diseases-apples-and-pears We recommend using the Virginia Tech Preventative Fruit Spray Schedule, which can be found on the following page: