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- Author or Editor: Rosa María Giménez Ferrer x
Leaf disk bioassays based on oviposition and damage accrued during 72 hours were used to screen 76 strawberry (Fragaria spp.) cultivars for resistance to the twospotted spider mite (Tetranychus urticae Koch). Oviposition rates (eggs/female per day) and damage scores were both highly variable, allowing cultivars to be classified, according to a combination of these two variables, into six categories of susceptibility or resistance: highly susceptible- `Canoga', `Ozark Beauty', `Scott', and `Tangi'; resistant—'Aiko', `Annapolis', `Apollo', `Bounty', `Cardinal', `Douglas', `Dover', `Fairfax', `Fern', `Floridabelle', `Glooscap', `Governor Simcoe', `Hecker', `Kent', `Pajaro', `Parker', `Rainier', `Redcoat', and `Vesper'; and highly resistant—`Profumata di Tortona' (F. moschata Duch.). Bioassay based on oviposition rates and damage scores was considered to be an efficient method to eliminate susceptible accessions from a breeding program, but authentication of putative resistance may require further testing in vivo.