I grow thornless blackberries, they have done great this year biggest they have ever been. they looked great till they turned black. then they have patches of brown on them .some spots are small, some cover most of the berry . never seen this before any idea what it is? I have noticed a lot a green worms in the berry bushes [ we called them inch worms as a kid}.
Looks like sun scald. Check out this link:
http://westernfarmpress.com/reducing-blackberry-sun-scald
Your pictures are out of focus =P
But, yea I was also thinking it's probably the sun. ^
