Composition, quantification, and periodicity of sex pheromone gland volatiles from individualHeliothis virescens females
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Sex pheromone gland volatiles from individualHeliothis virescens (F.) females were collected and analyzed on an SP-2330 capillary gas-liquid chromatography column for identification and quantification of the compounds emitted. Only four of the seven compounds previously reported as pheromone components appeared consistently in the volatile collections: 14:Ald, Z9-14:Ald, 16:Ald, and Z11-16:Ald. The female glands did not emit the same amounts of these compounds throughout a 24-hr period; they emitted maximum quantities between 6 and 11 hr after the onset of scotophase with the remainder of the photoperiod having minimal emission rates. Although the absolute quantities fluctuated, the percent compositions of the compounds remained about the same throughout the 24-hr period.
Key wordsHeliothis virescens Lepidoptera Noctuidae Z11-16:Ald 16:Ald Z9-14:Ald 14:Ald sex pheromone emission gland volatiles blend composition pheromone emission rates
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