I’m in Barrie, I have apple tree 8 years old on my back yard.
This year tree produce flowers, start to grow fruit and suddenly all leaves and flowers star to dying. Fee branches are dead already. Why this happen, that I can do to save tree?
Thank you for contacting Toronto Master Gardeners with your concern about the health of your apple tree.
It appears from your question that the problem appeared only this growing year. It is possible that our very wet spring may have contributed to the problem. The tree may be infected with Fire Blight which is caused by a bacterium, Erwinia amylovora.
The bulletin of Ontario Ministry of Agriculture, Food and Rural Affairs referenced below, describes, illustrates with photographs, and finally discusses monitoring and management of the infected tree.
https://www.omafra.gov.on.ca/english/crops/facts/fireblight.htm
We wish you well in saving your tree. Avoid providing nitrogen which nurtures new succulent growth, and disinfect your tools when pruning away diseased tissue back to healthy wood.