While we are on the subject of plant viruses strawberries are very prone to virus infections so if you grow your own start with good stock and propagate your own from runners, then every three years clear them out and start with fresh stock. Virus infected strawberries usually have pale unhealthy looking leaves and the fruit is small with hard centres.
So first year don't allow to crop to build up the plants for the next three years crop and propagate from runners then clear out and start again, happy strawberry growing to all DWD'ers out there.