Q.Why Do My Ripe Raspberries Have White Spots On One Side?
My ripe raspberries have white areas that look like sunburn. What is this and how do I fix it?
Certified GKH Gardening Expert
This IS sunburn! Unfortunately, sunscald can only be cured by providing shade. This is recommended after pollination.
Here are a couple of articles that will offer some suggestions on lessening the effects of sunscald:
https://www.gardeningknowhow.com/edible/fruits/raspberry/white-drupelet-syndrome.htm
https://www.gardeningknowhow.com/plant-problems/environmental/sunscald-on-plants.htm
This collection of articles will help you with the care of Raspberries: