They have 1 to 3 generations a year in Saskatchewan. In the spring, remove winter annual weeds. Tilling the soil discourages overwintering adults. In small areas, use white sticky traps to catch insects in spring before they lay their eggs. Insecticide application may be used prior to bloom, if populations warrant this, but beware that pollinators will also be affected.
Leaves appear blotched, speckled and grey and often fall off.
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.