If you see velvety green spots on your apples or leaves, it's a sign your fruit tree has been affected by a disease that can severely diminish your yield.

Apple scab is one of the most common apple and crabapple diseases that gardeners have to deal with. Apple scab is caused by the fungus Venturia inaequalis. It will attack any varieties of crabapple ...

This has been one of the worst years for disease that I can remember as a gardener. Both here at the Garden and throughout the Chicago area, I have noticed many crabapples as well as serviceberries ...

Q. The apples on our Prairie Magic tree have round black spots. At first I thought it was bruising from hail but it's also near the bottom of some fruit, where hail couldn't hit. What is this damage ...

There have been reports that 2024 has been a bad year for apple scab in both fresh-eating apples and crab apples. Apple scab infections on fruit start off olive-green and turn into a rough, cork-like ...

Q: Can you tell me what is wrong with my crab apple tree, and what I should do about it? The leaves started turning yellow earlier this summer and now there are hardly any leaves left. It looks awful.

There are hundreds of choices when picking a crabapple tree from the nursery, but a Purdue University expert says only a handful are resistant to a widespread fungus or other serious diseases. After ...

The problem with many plant diseases is once you notice them it’s often too late. That’s especially true with our trees. We often don’t gaze at the canopies of our trees looking for problems. The ...

Apple scab, caused by the fungal pathogen Venturia inaequalis, remains one of the most significant challenges to apple production globally. Intensive research has elucidated the complex interplay ...