02547nas a2200193   4500008004100000020001400041245012000055210006900175260002100244300001200265490000800277520180400285653002402089100002802113700002602141700002802167700002302195856013502218       2007                        eng d  a0008-347X00aThe response of Dendroctonus valens and Temnochila chlorodia to Ips paraconfusus pheromone components and verbenone0 aresponse of Dendroctonus valens and Temnochila chlorodia to Ips   cJanuary-February  a141-1450 v1393 aThe red turpentine beetle, Dendroctonus valens LeConte, 1860 (Coleoptera: Curculionidae, Scolytinae), is a common bark beetle found throughout much of North America and China. In 2004, we observed that attack densities of the California fivespined ips, Ips paraconfusus Lanier, 1970 (Coleoptera: Curculionidae, Scolytinae), in logging debris were inversely related to D. valens attacks on freshly cut stumps, which led to the demonstration that components of the aggregation pheromone of I. paraconfusus inhibited the response of D. valens to attractant-baited traps. In this study, we test the response of D. valens and Temnochila chlorodia (Mannerheim, 1843) (Coleoptera: Trogositidae), a common bark beetle predator, to racemic ipsenol, racemic ipsdienol, and (-)-cis-verbenol (IPSR) in the presence and absence of two release rates of (-)-verbenone. The addition of a relatively low release rate of (-)-verbenone (4 mg/24 h) to attractant-baited traps did not affect catch and had no significant effect on the response of D. valens to IPSR. IPSR significantly reduced D. valens attraction to baited traps. The addition of high release rates of (-)-verbenone (50 mg/24 h) to IPSR significantly increased inhibition; however, the effect was not significantly different from that observed with (-)-verbenone alone (50 mg/24 h). Temnochila chlorodia was attracted to traps baited with (-)-[beta]-pinene, (+)-3-carene, and (+)-[alpha]-pinene. The addition of (-)-verbenone (50 mg/24 h) significantly increased attraction. Traps baited with IPSR caught significantly more T chlorodia than those baited with (-)-verbenone. Few other beetles were collected. We are hopeful that these results will help facilitate the development of an effective tool for protecting Pinus spp. from D. valens infestations10aDendroctonus valens1 aFettig, Christopher, J.1 aMcKelvey, Stephen, R.1 aDabney, Christopher, P.1 aBorys, Roberty, R.  uhttps://weevil.myspecies.info/response-dendroctonus-valens-and-temnochila-chlorodia-ips-paraconfusus-pheromone-components-and-verb03115nas a2200277   4500008004100000020001400041245015800055210006900213260001200282300001200294490000700306520216400313653002402477100001702501700001702518700001602535700001802551700001702569700002002586700002002606700001802626700002002644700001702664700002102681856013502702       2007                        eng d  a0098-033100aResponse to host volatiles by native and introduced populations of Dendroctonus valens (Coleoptera: Curculionidae, Scolytinae) in North America and China0 aResponse to host volatiles by native and introduced populations   cJanuary  a131-1460 v333 aBark beetles (Coleoptera: Curculionidae, Scolytinae) have specialized feeding habits, and commonly colonize only one or a few closely related host genera in their geographical ranges. The red turpentine beetle, Dendroctonus valens LeConte, has a broad geographic distribution in North America and exploits volatile cues from a wide variety of pines in selecting hosts. Semiochemicals have been investigated for D. valens in North America and in its introduced range in China, yielding apparent regional differences in response to various host volatiles. Testing volatiles as attractants for D. valens in its native and introduced ranges provides an opportunity to determine whether geographic separation promotes local adaptation to host compounds and to explore potential behavioral divergence in native and introduced regions. Furthermore, understanding the chemical ecology of host selection facilitates development of semiochemicals for monitoring and controlling bark beetles, especially during the process of expansion into new geographic ranges. We investigated the responses of D. valens to various monoterpenes across a wide range of sites across North America and one site in China, and used the resulting information to develop an optimal lure for monitoring populations of D. valens throughout its Holarctic range. Semiochemicals were selected based on previous work with D. valens: (R)-(+)-[alpha]-pinene, (S)-(-)-[alpha]-pinene, (S)-(-)-[beta]-pinene, (S)-(+)-3-carene, a commercially available lure (1:1:1 ratio of (R)-(+)-[alpha]-pinene:(S)-(-)-[beta]-pinene:(S)-(+)-3-carene), and a blank control. At the release rates used, (+)-3-carene was the most attractive monoterpene tested throughout the native range in North America and introduced range in China, confirming results from Chinese studies. In addition to reporting a more effective lure for D. valens, we present a straightforward statistical procedure for analysis of insect trap count data yielding cells with zero counts, an outcome that is common but makes the estimation of the variance with a Generalized Linear Model unreliable because of the variability/mean count dependency.10aDendroctonus valens1 aErbilgin, N.1 aMori, S., R.1 aSun, J., H.1 aStein, J., D.1 aOwen, D., R.1 aMerrill, L., D.1 aBolanos, Campos1 aRaffa, K., F.1 aMontiel, Mendez1 aWood, D., L.1 aGillette, N., E.  uhttps://weevil.myspecies.info/response-host-volatiles-native-and-introduced-populations-dendroctonus-valens-coleoptera-curculionid02194nas a2200181   4500008004100000245009800041210006900139260000900208300001500217490000600232520160800238653002401846653002401870100001201894700002301906700001901929856006401948       2007                        eng d00aCross-attraction between an exotic and a native pine bark beetle: a novel invasion mechanism?0 aCrossattraction between an exotic and a native pine bark beetle   c2007  ae1302, 1-90 v23 aBackground. Aside from the ecological impacts, invasive species fascinate ecologists because of the unique opportunities that invasives offer in the study of community ecology. Some hypotheses have been proposed to illustrate the mechanisms that allow exotics to become invasive. However, positive interactions between exotic and native insects are rarely utilized to explain invasiveness of pests. Methodology/Principal Findings. Here, we present information on a recently formed association between a native and an exotic bark beetle on their shared host, Pinus tabuliformis, in China. In field examinations, we found that 35-40% of P. tabuliformis attacked by an exotic bark beetle, Dendroctonus valens, were also attacked by a native pine bark beetle, Hylastes parallelus. In the laboratory, we found that the antennal and walking responses of H. parallelus to host- and beetle-produced compounds were similar to those of the exotic D. valens in China. In addition, D. valens was attracted to volatiles produced by the native H. parallelus. Conclusions/Significance. We report, for the first time, facilitation between an exotic and a native bark beetle seems to involve overlap in the use of host attractants and pheromones, which is cross-attraction. The concept of this interspecific facilitation could be explored as a novel invasive mechanism which helps explain invasiveness of not only exotic bark beetles but also other introduced pests in principle. The results reported here also have particularly important implications for risk assessments and management strategies for invasive species.10aDendroctonus valens10aHylastes parallelus1 aLu, Min1 aMiller, Daniel, R.1 aSun, Jiang-Hua  uhttp://ukpmc.ac.uk/tocrender.cgi?action=archive&journal=312