It very well could be. I am including a link to a PNW Plant Disease Handbook which shows images like yours, and discusses the causes, cycle, and control options for blueberry leaf scorch. Plants should be tested for the virus. Samples should be submitted to the ODA, Plant Division, Plant Pest and Disease Lab. Lab fees are charged to the grower. Ph: (503)-986-4620
Oregon Department of Agriculture, Commodity Inspection Division, Plant Health
Program635 Capitol St. NE, Salem, OR, 97301-2532.I hope this helps.