EFFECT OF IRRADIATION ON DEVELOPMENT AND PROPAGATION OF LARCH BARK BEETLE (Coleoptera: Scolytoidea) Olfactory Reception of Conspecific Aggregation Pheromone and Host Volatile Terpenes by Asian Larch Bark Beetle, Ips subelongatus Identification and Biological and Physiological Characteristics of 3 Fungus Strains Associated with Ips subelongatus The species specific associations between Ips subelongatus and ophiostomatoid fungi