Scouting for Two-Spotted Spider Mites is critical early in the strawberry season. Managing this pest along with diseases will help plants be more productive once we move to spring harvest season.
See This Article from (VSN) Vegetable and Specialty Crop News. It talks about the importance of scouting early and controlling infestations early. This is especially true if you decide to cover the crop for extended periods of time to protect from extreme cold weather.
later in the season strawberry plants can tolerate higher numbers of mite, but early on low populations can do serious damage that lasts season-long.