Twospotted Spider Mite Resistance in California Strawberries1,2,3

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Ninety-eight strawberry varieties and selections were evaluated in the field from 1967 through 1969 for resist- ance to Tetranychus urticae Koch. Results for the varieties correlated closely with field experience of commercial growers: 'Shasta' and similar highly susceptible clones were highly susceptible in the tests, and 'Lassen' and similar less susceptible clones were significantly less susceptible; consistent with this, mite buildup was less on Lassen derivatives than on Shasta derivatives. Highly susceptible clones appear to be more pubescent than those that are less susceptible.

Document Type: Research Article

Publication date: February 1, 1972

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