02987nas a2200193   4500008004100000020001400041245015600055210006900211260001600280300001200296490000800308520224400316653001302560100002102573700001902594700002302613700002302636856013402659       2009                        eng d  a0008-347X00aAssemblage of Hymenoptera arriving at logs colonized by Ips pini (Coleoptera: Curculionidae: Scolytinae) and its microbial symbionts in western Montana0 aAssemblage of Hymenoptera arriving at logs colonized by Ips pini  cMarch-April  a172-1990 v1413 aColonization of a tree by bark beetles and their symbionts creates a new habitat for a diverse assemblage of arthropods, including competing herbivores, xylophages, fungivores, saprophages, predators, and parasitoids. Understanding these assemblages is important for evaluating, nontarget effects of various management tactics and for subsequently evaluating how changes in climate, the presence of invasive species. and altered forestry practices and land-use tenure may affect biodiversity. We characterized the assemblage of hymenopterans attracted to logs of ponderosa pine (Pinus ponderosa C. Lawson (Pinaceae)) colonized by the bark beetle Ips pini (Say) and its microbial symbionts. In one experiment, the composition and relative abundances, of species arriving at hosts colonized by I. pini, and possible sources of attraction, were determined. Treatments consisted of a loo containing I. pini with its natural complement of microorganisms, a log alone, and a blank control. A second experiment was carried out to determine whether or not Hymenoptera were attracted to microbial symbionts of I. pini. Treatments consisted of a blank control, a to, alone, a lop containing L pini with its natural complement of microrganisms, either Ophiostoma ips, Burk-holderia sp., or Pichia scolyti. and a log inoculated with a combination of these three microorganisms. Over 2 years, 5163 Hymenoptera were captured, of which over 98% were parasitoids. Braconidae, Platygastridae, Encyrtidae. Pteromalidae, and Ichneumonidae were the most abundant. Seven known species of bark beetle parasitoids (all Pteromalidae) were captured. However. parasitoids of Diptera, Lepidoptera, Hymenoptera. and non-wood-boring Coleoptera were also common. Nineteen species showed preferential attraction to host plants infested with I. pini and its complement of microorganisms, host plants inoculated with I. pini microbial symbionts, or host plants alone. Interestingly, many of these species were parasitoids of phytophagous, fungivorous, and saprophytic insects rather than of bark beetles themselves. These results Suggest that a diverse assemblage of natural enemies that attack various feeding guilds within a common habitat exploit common olfactory cues.10aIps pini1 aBoone, Celia, K.1 aSix, Diana, L.1 aKrauth, Steven, J.1 aRaffa, Kenneth, F.  uhttps://weevil.myspecies.info/assemblage-hymenoptera-arriving-logs-colonized-ips-pini-coleoptera-curculionidae-scolytinae-and-its