The secondary screwworm, pictured here, is related to the New World screwworm. CSU scientists are working to uncover the differences between the two blowflies to better control the New World screwworm. Traps fill with the abundant secondary screwworm, making it difficult to detect the more harmful New World screwworm. Metcalf’s project will develop lures specific to the New World screwworm using bacterial-produced smells from wounds for improved monitoring. Metcalf’s team will distinguish the difference between the VOCs that attract the New World screwworm versus the secondary screwworm.