Q.Cherry tree
I have one cherry tree in my garden and every year she makes flowers and then forms the cherry, but when they reach a 7 to 8 mm size cherry, they become black and after they die. What is the problem, please?
Thanks for your help
Reno Sacco

This could be brown rot or leaf spot.
Here are some links that will help pinpoint the disease and how to treat.
https://www.gardeningknowhow.com/edible/fruits/cherry/cherry-tree-care.htm
https://www.gardeningknowhow.com/edible/fruits/cherry/cherry-tree-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/cherry/cherry-tree-diseases.htm
http://www.ct.gov/caes/lib/caes/documents/publications/fact_sheets/plant_pathology_and_ecology/disease_control_for_home_cherry_orchards.pdf