Glyphosate (commercially sold as Round-Up) injury can be a common problem in raspberries. Raspberry varieties such as Nova are quite sensitive to glyphosate and injury can be caused by application several yards away in windy conditions or by spraying the plants and using a spray tank that has not been thoroughly washed out from an earlier spray containing glyphosate.
Glyphosate injury appears as a sharp purpling or pinking of leaf tissue in between the veins accompanied with severe curling of affected leaves. Generally, symptoms are most common on the tips of laterals, and they take on a thready appearance.
If the exposure has not been severe, the plant can most often recover and continue to fruit, albeit on a delayed schedule.