The boll weevil is dependent on cotton as its food source and site for reproduction. The pheromone produced when boll weevils are feeding on cotton provides an aerial scent trail which leads to the cotton field. Both male and female boll weevils respond to the pheromone. Fahrenheit and there is only a light wind.
Boll weevils fly into the wind following the scent trail.
The response of boll weevil to pheromone traps is greatest when there is no pheromone being produced in cotton. The quality and quantity of pheromone produced by boll weevils depends primarily on the food source. Boll weevils produce some pheromone when feeding on cotton prior to squaring, but pheromone production increases substantially as they begin to feed on developing squares. Once overwintered boll weevils enter squaring cotton, they are less likely to respond to pheromone produced outside the cotton field. Traps located away from cotton fields will continue to catch boll weevils.