My plum tree fruits have small, clear, resin-like drops on them, any idea what could be causing this? See picture below.
Aphids pierce the fruit and it exudes a resin.
My dad's plums often have this on them, the fruit are fine
Ahhh, i saw this resin stuff on my cherry, now i know what it is
What is it then!?
It's resin! The tree produces it as a defence and to help heal itself. It's the tree equivalent of a human scab. As fidgetbones said, the most likely cause is that bugs pierced the skin of the fruit.
Hi, I'm fairly certain that peach borer only occurs in the USA and Australia etc - I haven't heard that it's a problem in the UK and can't find reference to it having arrived here ....
So that's one less thing to worry about