Japanese Woodblock Prints

My mother bought old Japanese woodblock prints while visiting the country. They were framed in the United States and given to friends and family members.  About 20 years later, most of the gifts were being damaged by a bug that must have finally hatched and started eating the paper in curved trails. We opened the frames, sprayed with an insecticide, and stopped most of the damage. Repairs to the old damage were very expensive, more than the value of the print. A frame store should be able to disinfect before framing.