Hooked trichomes and resistance of phaseolus vulgaris to empoasca fabae (harris)
1978
PILLEMER, ERIC A. | TINGEY, WARD M.
Two cultivars of the bean, Phaseolus vulgaris L., differing in densities of hooked trichomes were examined for resistance to the potato leafhopper, Empoasca fabae. The major plant factor affecting leafhopper performance was the density of hooked trichomes. Leafhoppers were impaled by these epidermal appendages, leading to wounding and death. Nymphal survival on the cultivar, “California Light Red Kidney” (hooked trichome density: 2000/cm²) was significantly less than that on “Brasil 343” (hooked trichome density: 400/cm²). Hooked trichomes limit damage to beans by reducing the population density of the potato leafhopper
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