Answers are grounded in this paper and cite their sources.
The female codling moth produces a sex pheromone which is shown to originate in a glandular structure opening dorsally in the intersegmental fold between the last 2 segments of the abdomen.
No takes yet. Share an insight, caveat, or question.
Barnes et al. (1966) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: