To a moth, the bait smells like a female moth looking for a mate, luring males to death by starvation inside the bottles. This disturbance of the sex ratio in the moth population can lower the number of moths in the area by reducing breeding opportunities.
性費洛蒙會發出雌蛾求偶的氣味，引誘雄蛾飛入盒中而餓死，雄蛾比例嚴重失調，就可以減少蟲類交配機率，降低蟲的數量。