Leptoglossus occidentalis Heidemann (Heteroptera: Coreidae), commonly known as western conifer seed bug (WCSB), is an invasive pest in the Mediterranean, where it has been associated with decline of Pinus pinea L. kernel production. A biological control WCSB populations native egg parasitoids may reduce economic losses. With purpose to obtaining masses laid situ bags WCSB, adults were placed, f...