Resistance to Twospotted Spider Mite and Strawberry Aphid in Fragaria chiloensis, F. virginiana, and F. ×ananassa Clones

More than 170 clones of Fragaria ×ananassa Duch., F. chiloensis (L.) Duch., and F. virginiana Duch. were tested for resistance to the twospotted spider mite ( Tetranychus urticae Koch). Twenty-seven clones had >75% fewer mites than did F. ×ananassa 'Totem', a susceptible clone. About two-thirds of the clones also were tested for resistance to the strawberry aphid (Chaetosiphon fragaefolii (Cockerell)). Survival and reproduction was significantly lower on two clones each of F. ×ananassa and F. virginiana than on 'Totem'.