Abstract
The mating disruptive effect of the synthetic sex pheromone diamolure on Helicoverpa armigera (Hübner) was examined in lettuce fields. The number of adult males attracted to sex pheromone traps in treated fields was less than those in the non-treated fields. In addition, the number of mated females and injured lettuce plants in the treated fields were both lower than those in the non-treated fields. Accordingly, diamolure was effective as a mating disruptive agent for H. armigera.
