How to Treat Bonanza Peach Tree Diseases

"Bonanza" is a semi-dwarf peach variety that only grows 8 to 10 feet tall, making it suitable for both small yards and container gardening. The tree is self-fruitful, so you only need one to produce peaches, and the fruit is freestone, meaning the pit comes out cleanly with no pulp attached. Bonanza is an erratic producer that may yield fruit one year and none the next. It is susceptible to a variety of fungal diseases that you will need to treat.

Pruning clippers or shears
Ladder
Rake
Shovel or hoe
Plastic trash bags
Fungicide

Instructions

- 1
  Prune out as much diseased plant material as possible. Cut at least 1 inch or more of each limb or branch than the point at which the disease appears to stop. This ensures that all of the diseased portion is removed. Use the ladder to reach higher limbs, if necessary.
- 2
  Place the Bonanza peach tree cuttings into a plastic trash bag and take them away from the garden for disposal. Follow local ordinances for proper disposal. Do not use the cuttings as mulch, since this will only spread the disease.
- 3
  Rake up all fallen leaves, limbs or other plant debris. Use the shovel or hoe to dig up weeds around the tree. Place the weeds and plant debris in a plastic trash bag and dispose of the material away from the garden.
- 4
  Apply a fungicide to treat the specific fungus attacking the tree. Scab causes small black spots on the fruit, and bacterial spot causes angular or irregular spots on the leaves. Powdery mildew fungus forms white, powdery-looking blotches on foliage, while brown rot wilts peach blossoms and causes fruits to shrivel and become mummified. Leaf curl appears in spring, deforming the leaves, which then drop, leaving the tree weakened. Follow package directions for proper application and timing of the fungicide.

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