Abstract
The sex pheromone produced by the virgin female California red scale, Aonidiella aurantii, was isolated by three methods from a cold trap condensate and insect homogenate. Extensive silicic acid, silica gel-silver nitrate, Sephadex, thin-layer, and gas-liquid chromatography were used to effect the pheromone isolation. Comparisons were made between known unsaturated acetates and the pheromone. A number of synthetic model unsaturated acetates were also bioassayed in the laboratory for attractancy to the males.
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