Sex pheromone traps usually only attract male insects. True or False?

Sex pheromone traps are specifically designed to attract male insects, which is why the statement is true. These traps utilize chemical signals called pheromones that females of specific species release to attract males for mating purposes. By mimicking the natural pheromones, the traps effectively lure the males, allowing for monitoring and control of pest populations.

In the context of pest management, targeting males can be particularly effective because it interrupts the mating process, potentially leading to a decline in the overall population. Additionally, since these traps are tailored to the mating behaviors of certain species, they usually do not attract females or other non-target insects, aligning with the designed purpose of sex pheromone traps.

The other options suggest conditional scenarios, such as some species or environmental factors influencing trap effectiveness. However, the core principle remains that sex pheromones primarily attract males, affirming the accuracy of the statement provided.