Abstract
The site of sex pheromone production in female Supella longipalpa (F.) was localized to the fourth and fifth abdominal tergites. Behavioral assays of males with hexane extracts of various female body parts showed that these tergites were significantly more attractive than any other region of the body. Both behavioral and electroantennogram assays confirmed that the fourth and fifth tergites contained significantly more sex pheromone than any other tergites. Cuticular pores occur on all tergites, but their density is highest on the lateral margins of the fourth and fifth tergites. Each pore is connected via a long duct to modified epidermal cells, suggesting that these structures are involved in pheromone production and in its release while the female engages in calling behavior.
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