Victoria Plums

This is most likely birds pecking the fruit, pick as required, if you get invaded get busy and make some jam.

Hi Daveandmarg and welcome to GoY. An insect is drilling through the ski of your plums and the rhubarb to get to the sugars. This causes the little blobs of gel. I wouldn't worry about too much.

Doubt the plums are ready to pick yet - our certainly aren't and I've never seen birds peck at rhubarb - which doesn't mean they don't!

I don't know what part of the country Daveandmarg live, we have had early blue plums ripe for a month and the Victorias are just about ready.