Why are there some white spots on my blackberries?

Question

Some of my cultivated blackberries will have whiteish seed/pulp pieces among the ripe, black ones. What is causing this?

Answer 1

It sounds like white drupelet disorder, which is common in both raspberries and blackberries. Here is more information: https://www.gardeningknowhow.com/edible/fruits/raspberry/white-drupelet-syndrome.htm