Plum Tree

Question

We have a plum tree which is about 5yr every year the fruit has a mottly coloured circle on fruit.
Would you be able to help identify this problem and offer advice.
Thanks Pam

• 

Answer 1

This would appear to be Brown Rot on your plums.

Here is more information on this issue and how to treat.

https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/peach/brown-rot-fungus.htm