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Chemical and Morphological Factors of Resistance Against the Twospotted Spider Mite in Beach Strawberry

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Clones of beach strawberry, Fra˜aria chiloensis (L.) Duchesne, and the cultivated strawberry, Fragaria x ananassa Duchesne 'Totem,' varied in suitability for survival and oviposition of the twos potted spider mite, Tetranychus urticae Koch. Strawberry clones also differed in densities of glandular and nonglandular trichomes and concentrations of total and catechol-based phenolics. A negative relationship observed between mite survival and the density of glandular trichomes may have resulted from entrapment of mites by sticky exudates from glandular trichomes. Mite oviposition was negatively correlated with densities of glandular and nonglandular trichomes and the concentration of total foliar phenolics. However. mite oviposition was best described by a model that combined three interacting morphological and chemical characteristics of the strawberry plant rather than by any individual characteristic.

Document Type: Research Article

Publication date: April 1, 1990

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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