Common Fruit Tree Diseases
Fruit trees are very diverse, but there are some common fruit tree diseases that can be found in many of them. The best thing you can do when preventing fruit tree diseases is to prune the tree(s) to allow sun and air through the branches, as disease spreads easily in dark, damp environments.
Peach scab and leaf curl
Peaches, nectarines, and plums often fall victim to the same problems, like peach scab and peach leaf curl.
With peach scab, the fruit and new twigs are covered in round, black spots surrounded by a yellow halo. Remove the affected parts of the tree. With leaf curl, the leaves dry and curl up on themselves. Apply a fungicide before the period of bud swell.
Brown rot
Brown rot is an especially common fruit tree disease. Some of the many trees it can affect include:
Peaches Nectarines Plums Cherries Apples Pears Apricots Quince
With brown rot, the stems, flowers, and fruit are all covered in a brown fungus that eventually mummifies the fruit. Remove the affected parts of the tree and fruit, and prune to allow for more sunlight and air circulation among the branches.
Bacterial canker
Bacterial canker is another disease that can be found in virtually every fruit tree. The particular disease symptoms in fruit trees include holes in the leaves, as well as new shoots, and even whole branches dying off. It is mostly found in stone fruit trees and trees that have suffered frost damage. Cut off the affected branches several inches (8 cm.) below the disease and apply a fungicide.
