Mold on the peach fruit

Asked July 12, 2019, 6:53 PM EDT

I have two peach trees which produce a lot of fruits, but unfortunately, the fruit rots on the tree before they are ripe! What could be the problem??

Howard County Maryland disease issues fruit brown rot

1 Response

Hi- brown rot is a common, destructive fungal disease that makes growing stone fruit a challenge for Maryland gardeners and commercial growers. Sanitation and properly timed fungicide sprays help to combat the disease. The fungus overwinters in twig cankers and in mummified fruit that is left hanging on the tree or has dropped to the ground. So, pick off and dispose of infected fruit (and fruit stems) from the tree and rake up any that has fallen around the tree.

Next year, apply labeled fungicides when the blooms are between 5-10% open, at full bloom, and about 2 weeks prior to harvest. It is best to apply fungicides before a rain event is predicted instead of waiting until after. Additional cover sprays will be necessary if we are experiencing a cool, wet spring and summer. Rotating fungicides helps to reduce the fungus from becoming resistant to the preventative sprays.

Fungicides available to home gardeners can prevent but not cure infections. Organic fungicides like sulfur can be somewhat effective but may damage new spring growth. Immunox, captan, and Bonide’s Fruit Tree and Plant Guard are the three available synthetic fungicides.

More brown rot information:

https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/456/456-018/ENTO-289C.pdf

VA Tech fruit pest guide and spray schedule:

https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/456/456-018/ENTO-289C.pdf

Jon