Genital sex pheromones of ixodid ticks. I. Evidence of occurrence in anterior reproductive tract of American dog tick, Dermacentor variabilis (Say) (Acari: Ixodidae)

The occurrrence of a genital sex pheromone in the anterior reproductive tract of partially fed female Dermacentor varibilis was demonstrated by extraction and bioassay. A new type of bioassay, the "neutered" female assay, was developed to test the potency of extracts or chemically defined...

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