The mites may be tiny whitish, greyish or greenish specks on the underside of foliage, usually associated with a very fine webbing. They can be seen in the spring as soon as foliage appears. All stages may be present at one time with 4-5 generations per year. Immature and adult stages both injure plants. Mites are white to pale yellow and can only be seen using a magnifying glass due to their small size.
Leaves become wrinkled and plants are unthrifty.
Fruit is either absent or poorly formed. Do not use within 7 days of harvest. They are common on land that was in sod in the previous year. The grubs feed on the roots of the strawberry plant usually killing it. Flour in warm water controls grubs as it sticks and dries on their soft bodies.