Trimming raspberries

Question

I read that raspberries should be trimmed late winter, early spring. But my raspberries are already 8 to 10 feet long and growing! What would be wrong in cutting them back now–late August? Thank you.

Answer 1

Pruning is type specific for Raspberries.
Pruning in the summer months can harm the fruiting and open up the plants to insects and fungus problems.

https://www.gardeningknowhow.com/edible/fruits/raspberry/pruning-raspberry-bushes.htm