Red Berry Mite or UV Sun Damage - BLACKBERRIES
I have similar looking blackberry to this poster here.
I have a thornless plant in the ground that produces a lot of berries (probalby around 300-400). A lot of the fruit are large and when fully ripe, they are delicious. About 50% of the crop is red and black like the pics. How do i know if it's UV sun damage or red berry mite? The red parts are VERY hard. The same thing happened last year with about 50% of the crop not fully ripening and the red parts extremely hard.
I'm thinking it might be red berry mite, because some of the fruit on the same bunch ripens fully and some don't (i gather they would have the same sun exposure).
Any thoughts? If it's redberry mite, what's worked for you guys? I read that some horticultural oils are the best defense for them...