plums are leaking a gummy substance and turning black

Question

Plums on my tree are leaking a gummy substance and turning black. What is it and can I do anything about it? I want to know if I can save this year’s crop of plums.

Answer 1

From your description it's difficult to tell exactly which plum disease is attacking your tree. This article has information on common diseases: https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-diseases.htm
You can get a positive identification through your local master gardener association. This link will help you find the nearest one:
http://mastergardeners.org.uk/get-involved/find-your-nearest-master-gardener/