FEMALE SEX-PHEROMONE OF THE LONGHORN BEETLE MIGDOLUS-FRYANUS WESTWOOD- N-(2'S)-METHYLBUTANOYL 2-METHYLBUTYLAMINE

The first known long-range female-released sex pheromone for the famil y Cerambycidae is reported from Migdolus fryanus, a sugarcane pest in South America. Although two female-specific compounds, namely, N-(2'S) methylbutanoyl 2-methylbutylamine and N-formyl L-isoleucine methyl est ers were identified, field tests with synthetic chemicals revealed tha t only the amide was active and that the amino acid derivative neither increased or decreased trap catches by the amide. This is the first i dentification of an amide as a sex pheromone.