 It is hypothesized that these two species share the sex pheromone (Z,Z)-11,13-hexa decadienal which female "A. transitella" use to attract males of their species.However, male "P. farinalis" are also attracted to this pheromone and will court and copulate with "A. transitella" females, but it is unlikely that offspring of these copulations would be viable.Because of the meal moth's extensive appetite for cereals and grains, it is considered a pest by agriculturists.