SAES-422 Multistate Research Activity Accomplishments Report

Status: Approved

Basic Information

Participants

Ayres, Matthew (Matthew P Ayres@dartmouth.edu)- Dartmouth University; Baker, Frederick (fred.baker@usu.edu) - Utah State University; Bentz, Barbara (bbentz@fs.fed.us) - US Forest Service; Bonello, Pierluigi (bonello.2@osu.edu) - The Ohio State University; Chorbadjian, Rodrigo (chorbadjian.1@osu.edu) - The Ohio State University; Coakley, Stella (stella.coakley@oregonstate.edu) - Oregon State University; Cook, Steve (stephenc@uidaho.edu) - University of Idaho; Erbilgin, Nadir (erbilgin@nature.berkeley.edu) - University of California, Berkeley; Eyles, Alieta (eyles.1@osu.edu) - The Ohio State University; Harrington, Tom (tcharrin@iastate.edu)- Iowa State University; Herms, Dan (herms.2@osu.edu) - Ohio State University; Jacobi, William (william.jacobi@colostate.edu) - Colorado State University; Klepzig, Kier (kklepzig@fs.fed.us) -US Forest Service; McPherson, Brice (aoxomoxo@nature.berkeley.edu) - University of California, Berkeley; Meyer, Richard (hmeyer@csrees.usda.gov) - USDA/CSREES; Negron, Jose (jnegron@fs.fed.us) - US Forest Service; Ockels, Frances (ockels.1@osu.edu) - The Ohio State University; Paine, Timothy (timothy.paine@ucr.edu) -University of California, Riverside; Raffa, Kenneth (raffa@entomology.wisc.edu) - University of Wisconsin, Madison; Rieske, Lynn (lrieske@uky.edu)- University of Kentucky; Seybold, Steve (sseybold@fs.fed.us)- US Forest Service; Stark, Dan (danstark@nature.berkeley.edu) University of California, Berkeley; Storer, Andrew (storer@mtu.edu)- ; Sullivan, Brian (Briansullivan@fs.fed.us)  US Forest Service; Wallis, Christopher (wallis.23@osu.edu) - The Ohio State University; Wang, Duan (wang.778@osu.edu) - The Ohio State University; Wood, David (bigwood@nature.berkeley.edu) - University of California, Berkeley.

Brief Summary of Minutes of Annual Meeting There was a change in the availability of holding the meeting in selected location in the fall of 2006. Thus, Jose Negron and Bill Jacobi offered two dates in September and October but members were too busy to attend. Thus, it was decided to hold the next meeting prior to the Western International Forest Insect Conference on Monday, March 5, 2007 in Boise ID. Minutes of the March 5, 2007 Meeting in Boise ID W1187 2006 Annual Meeting March 5, 2007 in Boise, ID Discussion on the submitting of projects/reports Participants and continuation of committee: " Less than on list of SAES 422 Multi-state Research Activity " Talk about during the Business Meeting Registration: " Paying: $35 estimate - figure out at end of meeting Secretary: Fred Baker was elected. " However will be unable to start immediately Intoductions: Bill Jacobi, Russell Beam (graduate student), Jennifer Klutsch (graduate student), Luc Tran (graduate student), Brian Sullivan, Nadir Erbilgin, Ken Raffa, Erin Powell (graduate student), Dave Wood, Fred Baker, Steve Cook, Brian Shirley (graduate student), Barbara Bentz, Brian (graduate student), Matt Hansen Station Reports: Steve Cook - Current Bark Beetle work: University of Idaho - Natural Resource Entomology Lab " Funded BB Projects both current and just starting " MPB infestation detection - aerial detection survey maps compared with three types of multi-spectral imagery o Multispectral sets useful for BB - quickbird would be best to find individually attacked trees - expensive o Need to separate various stressing agents, maybe looking at a disturbance index o Need to separate species. In the west can separate major genera - but LP from other pines& o Grand fir and white fir hybridize - different from West and East - and different susceptibility to Balsam wooly adelgid o Purpose is to provide land managers a tool to identify recent BB infestation and do silvi o Long term data set to look at change with temp/precipitation - MPB and balsam wooly adelgid Brian Shirley - current research - methods Mycangial fungi as a source of N to Scolytids - Using stable isotope analysis, Determine the fractionation rate for tree to BB, tree to fungi, fungi to BB (need fungi free BB, Ips pini on artificial medium - Dave Hunt; labor intensive and brood low, sterilization of eggs of yeast and fungi but prob not bact - mercuric chloride; has Ips imarginatus which has big eggs, it may work; prob with trans-ovarian transfer of microbes) Fred Baker Has two students in urban forestry Ozone work paper out - more O3 in mountains than valleys DM in N Minn. - comparing FIA data, do not get DM right, now have data to parameterize landscape wide model Root disease and Spruce Beetles - delayed due to litigation, root disease more uniform than though, probably will be an increase in blow down, cull high due to tomentosus root disease Aspen Decline - probably not occuring, look at FIA data for long term trends - drought, lower elevation, poorer sites, sheep grazing; needs disturbance (BB associated, regeneration an issue); need to actually start looking on the ground and be thorough in the analysis Teaching 4 courses a year so more research and sabbatical will be delayed Ken Raffa - Current research on bark and wood boring beetles at UW-Madison Interactions among below and above ground processes in red pine - long term research in environmental biology from NSF over 5 years; evaluate role of root beetle-fungal complexes in red pine by pine engraver and 3 other; collaborators and statistical difficulties; predator dispersal and predator-prey interactions - 2 year prog., mark and recapture with baited traps, predators a much better dispersers than bark beetles; Beetle microbial symbiosis - bacterial effect BB/fungi - SB - fungi invade BB galleries and kill adults and brood, Cardoza et al. 2006, bacteria protect beetles from fungi by regurgitant that has bacteria that inhibits fungi, not unique to SB, two bacteria from D. valens enhance growth and sporulation of major symbiont, interactions between BB associated fungi and bacteria strongly influenced by tree chemistry (a-pinene), investigating other terpenes and combos, want to look at what compounds from bacteria are inhibitory, Gut microbiota - Bark and wood-boring beetles and Lepidoptera - and mode of action for Bt Mechanisms of population release in eruptive species - how do herbivore populations release from stable to eruptive conditions, collaborative with BC people, does res of trees attack by MPB vary with popultaion phase?, generation of positive feedback with MPB - with lower population relying on prior BB attacks but with higher population then not reliant on other BB, but with pine engraver not the case Interactions between MPB and fire in greater Yellowstone Area and reproductive success of MPB in fire injured LP Nadir - Interaction among BB, pathogens and conifers in North American Forests Characterize the role of biotic and abiotic factors in predisposing trees to BB attack and subsequent mortality - effects of induced defenses of Norway spruce to BB with methyl jasmonate, need to know: landing rates, quality and quantity of pheromone production, response of natural enemies, colonization behavior, olfactory receptors, cost of induced defenses; Attraction of ambrosia and BB to coast live oak infected by P. ramorum - inoculated trees attracted greater than 95% of ambrosia, bb, and powderpost beetles trapped; infestation of SOD infected oak trees by wood inhabiting filamentous fungi; Characterize the diversity and interactions among tree hosts, bb, their natural enemies and associated fungi - Fusarium circinatum and Monterey pine, with BB if BB exposed to right amount (high level) of spores then induce SIR and low levels of spores may make tree more susceptible Brian Sullivan - consolidation of groups of entomologists, pathologists, and invasive plants within southern research station with Kier Klepzig as project leader of new unit SRS-4552 and Brian Strom leader of Forest Insects Team Reexamination of the semiochemical system of the SPB - evidence that male SPB contribute to the aggregation pheromone, beetles sensitive to endo-brevicomin, especially +, and may be the male aggregation pheromone, with frontaline/turpentine/(+)-endo-brevicomin there was the highest BB attraction, with 100m tree spacing, is (+)-endo-brevicomin an attractive (i.e. not repellant) switching pheromone for SPB?, instead of a repellant, a pheromone plume of attractant is making other trees more attractive D. frontalis in Central America actually two species? - large morph (=D. woodii) does not respond to frontalin/host odor-baited traps - but argued whether different species, working with ECOSUR in Mexico, not easily distinguished, D. woodii morph females produced endo-brevicomin, and in D. frontalis morph the males produce endo-brevicomin Barbara Bentz- Reported on the bark beetles found in fire damaged ponderosa and Douglas fir and what tree conditions they preferred. Bark beetle brood production was greatest in large Douglas-fir and ponderosa pine with some level of fire injury. Trees with severe fire injuries produced large numbers of beetles and are not population sinks for Douglas-fir beetle and western pine beetle. Bark beetles can be a significant secondary effect in post-fire delayed mortality of Douglas-fir and ponderosa pine. Significantly more bark beetle-attacked trees in the unit that had been prescribed burn compared to the unit that was not burned. Black-backed and three-toed woodpeckers were found nesting in the unit after prescribed fire compared to no nests found prior to burns. Bill Jacobi- Studies continue to determine if the exotic banded elm bark beetle is able to vector the Dutch elm disease pathogen. Studies in 2006 found poor survival of the beetle and low wounding rates on intact field branches and excised branches in laboratory situations. Fungal transfer to the wounds did occur but movement of the fungus in the tree or disease symptoms were not noted. Additional studies will be carried out in 2007. Business Meeting: Discussion about holding the annual meeting each year before the western forest insect work conference or some other large tree insect or disease meeting. We will try to hold the next meeting in March of 2008 but we need to talk to the Advisor to see if this is permissible. Meeting was adjourned at 5:00 pm

Accomplishments

Below is a summary of accomplishments completed by members between 10-2005 and 10-2006. Accomplishments Objective 1: Characterize the role of biotic and abiotic factors in predisposing trees to bark beetle attack and subsequent mortality. We completed the third year of a five-year project on declining red pine stands in Wisconsin. We are testing the roles of root colonizing beetles and Leptographium associates in predisposing trees to Ips. During 2006, we placed primary emphasis on spatially explicit statistical approaches, mark-recapture experiments to evaluate the role of dispersal in predator-prey interactions and relationships of tree defense physiology and chemistry to root infection. We are beginning a new study in collaboration with Monica Turner, Bill Romme, and Dan Tinker on interactions between MPB and fire in Yellowstone Park. We are studying competitors in fire-scarred trees. We have completed the second year of a survey to determine the relationship of dwarf mistletoe infestations and the occurrence of Mt pine bark beetle on ponderosa pine in the Front Range of Colorado. There is a definitive association of more beetle activity and the presence of dwarf mistletoe infested trees. We are examining the impact of tree fertilization and stand thinning on nitrogen assimilation from tree to fungus to insect in the lodgepole pine  mountain pine beetle system. We continued our work on the elucidation of the mechanisms of induction of systemic resistance (systemic induced resistance, SIR) in pine. Two major avenues of research were pursued: 1) biochemical and molecular basis of SIR against pathogens, including studies of phenolic, terpenoid, and protein-based defenses, and signaling pathways; and 2) effects of soil fertility on susceptibility to pathogen and insect attack, and the host-mediated cross effects between pathogens and insects. In general, fungal infection of pine made the host more resistant to subsequent pathogen and insect attack (SIR), but attack by a defoliator can also make the tree more resistant to subsequent pathogenic attack. However, these cross effects were both variable over two seasons, and asymmetric, with the pathogen being more consistent in inducing SIR. Soil fertility did not have any major effects on SIR phenotypes, but some effects on constitutive biochemistry. Some specific secondary metabolites and groups of metabolites were strongly and positively correlated with resistance to pathogen attack, suggesting a role in the SIR phenotype. We have begun characterizing the chemistry of coast live oak defense against the sudden oak death pathogen, Phytphophthora ramorum and found that several phenolics induced in the phloem by the pathogen are strongly inhibitory against four different Phytophthora species, including P. ramorum, indicating a possible role in defense for these induced compounds. We have also begun characterizing the comparative phloem chemistry of native ash species and Manchurian ash to search for chemical correlates to the higher resistance of Manchurian ash to the emerald ash borer. One major class of compounds found in Manchurian ash but not in NA ashes is coumarins. These may have allelochemical effects against the buprestid, a hypothesis we plan on testing in 2007. Douglas-fir beetles were found to not preferentially attack trees with both maximum crown and cambium injury, but instead some intermediate level following wildfire. Beetles were attracted to trees with high levels of crown scorch, but not cambium injury, 1 and 2 years post-fire. Western pine beetle was observed attacking ponderosa pine with more severe fire-related injuries than were found for Douglas-fir beetle attacking Douglas-fir. Field data suggest that temperature-dependent voltinism strategies of outbreak mountain pine beetle populations in high elevation whitebark pine forests are different than strategies observed in lower elevation lodgepole pine forests. One of the studies under the national Fire-Fire Surrogate program is located in the Blodgett Research Station in California. Four treatments are: (1) no treatment, (2) thin and masticate only, (3) burn only, and (4) thin and burn. These treatments were conducted in 2002-2006. We have monitored landing rates of beetles on sticky traps that flight intercept traps that are randomly located throughout the treated and control areas. Analyses are currently underway to determine the effect of these treatments on subcortical insect populations, disease incidence, and subsequent tree mortality. In collaboration with Dr. P. Bonello at the Ohio State University, we have been investigating the role for bark beetles in vectoring P. ramorum and other Phytophthora spp. and to determine the role of bark and ambrosia beetle infestation in the introduction and/or stimulation of decay fungi associated with tree mortality and breakage. Objective 2: Characterize the diversity and interactions among tree hosts, bark beetles, their natural enemies and associated fungi. We are analyzing the gut bacteria the southern pine beetle, pine engraver, and spruce beetle, and three wood borers, Asian long-horned beetle, linden borer, and emerald ash borer. Methods are by 16S rDNA and culturing. Functional studies are evaluating cellulotic and detoxifying roles of bacteria. We described a new interaction among spruce beetle, bacterial associates, and fungal associates. Spruce beetles egest liquids filled with bacteria that inhibit antagonistic fungi. We described a new structure on spruce beetles that contains nematodes and yeasts. Genetic analyses of spruce beetle based on mDNA and microsatellites were completed in collaboration with Rick Harrison, Cornell University. Lodgepole pines in stands experiencing various levels of mountain pine beetle pressure were assayed for tree defense characters, to test whether trees of different resistance levels are selected during endemic vs. eruptive conditions. Analyses include constitutive chemistry, induced chemistry, and resin flow. Trees include absence or presence of putatively predisposing insects and competitors. We have continued studies on the fungal associates of southern pine beetle and Mexican pine beetle in Mexico and the southwestern United States. We are in the process of identifying these fungi, many of which may be new species. We have continued studies on the relationship of the Dutch elm disease pathogen and the new exotic banded elm bark beetle to determine if the beetle can vector the fungal pathogen to elms and allow infection and disease development Using a combination of amplified fragment length polymorphism (AFLP) and mitochondrial sequencing analyses, we found evidence of genetic structuring among mountain pine beetle populations that followed a broad isolation-by-distance pattern. Our results suggest that the geographic pattern of gene flow follows the core distribution of the principle D. ponderosae host species, around rather than across the Great Basin and Mojave Deserts. Additionally, line-cross experiments suggest that dominance and epistasis are responsible for temperature-dependent life-history trait differences among geographically separated populations. Temperature regime dictates the fungal species associated with emerging D. ponderosae suggesting that climate change will influence not only the beetle but also its symbionts. Objective 3: Integrate and apply the knowledge gained from objectives 1 and 2 to forest ecosystems as influenced by emerging issues such as invasive species, global climate change, changing land use patterns and multiple and conflicting societal demands. We are participating in a collaborative project on the eruptive dynamics and spatial spread of the mountain pine beetle, as influenced by land use patterns and climate. We completed the third year of a five-year project on control measured for declining red pine stands in Wisconsin. We have a study of thinning in a root disease infested stand of Engelmann spruce with an increasing population of spruce beetles. Large amounts of butt cull suggest that the root disease is extensive. We are participating in a collaborative project on the eruptive dynamics and spatial spread of the mountain pine beetle, as influenced by land use patterns and climate. We are examining the use of multi-spectral and hyper-spectral data for use in detecting and delineating outbreaks of mountain pine beetle (D. ponderosae) in various host species. Pheromone-baited funnel traps may not be a reliable indicator of flight timing in some Dendroctonus species, although numbers of beetle trapped may be a correlate of population phase. Knowledge of basic temperature dependencies (e.g. phenology and cold hardening) are being used to evaluate hypotheses of how climate change may influence mountain pine beetle range expansion. We demonstrated that two species of twig beetles (Pityophthorus setosus and P. carmeli) which were contaminated with two spore loads transmitted the pitch canker pathogen to live, asymptomatic mature Monterey pine branches in a confined environment in nature

Impacts

  1. New-Mexican pine beetle was just recently identified by members of this committee as occurring in the United States. This newest invasive species may pose a threat to US forests and is already impacting forests in Mexico and Central America.
  2. Identification of the Mexican pine beetles fungal associates will further our understanding of the beetles population dynamics and provide possible avenues for biological control and management
  3. Identification of causal agents of tree diseases and mortality will allow us to respond more effectively and more quickly to the exotic pathogens and insects
  4. Improved sampling and better understanding of tree sensitivity to the above causal agents is allowing us to better time and target control remedies resulting in lower and more effective and environmentally benign remedies. For example, determining if the banded elm bark beetle, an exotic insect pest is a vector of the Dutch elm disease pathogen will allow for improved IPM practices.
  5. We have identified root feeding insects and pathogens as major predisposing factors to attack of red pine by bark beetles in the Midwest.
  6. We continue to train undergraduate and graduate students and postdocs, and place them in academia, the public sector (e.g. US Forest Service, state Departments of Natural Resources), and the private sector (e.g. private arboreta). This will guarantee continuous replacement of existing personnel at a time of critical, increased national demand for individuals trained in the identification and management of exotic pathogens and pests threatening our terrestrial ecosystems.
  7. Understanding which defense mechanisms are involved in the strengthening of resistance in pathogen-induced trees will allow for selection of tree genotypes that are more resistant to pathogen and insect attack. Isolation and characterization of signaling molecules involved in SIR will allow for the potential development of chemicals to induce resistance in trees in the absence of a fungal infection.

Publications

Publications Aukema, B.H, Carroll, A.L., Zheng Y., Zhu, J., Raffa, K.F., Moore, R.D., Stahl, K., & S.W. Taylor. Effects of temperature, reproduction, and dispersal on erupting mountain pine beetle populations: Inference on underlying processes from landscape-scale analyses. Subm. to Ecography. Bentz, B.J. 2006. Mountain pine beetle population sampling: Inferences from Lindgren pheromone traps and tree emergence cages. Canadian Journal of Forest Research 36(2):351-360. Bentz, B.J. and D.L. Six. 2006. Ergosterol content of three fungal species associated with Dendroctonus ponderosae and D. rufipennis (Coleoptera: Curculionidae, Scolytinae). Annals of the Entomological Society of America 99(2):189-194. Bonello, P., T.R. Gordon, D.L. Wood, D.A. Herms & N. Erbilgin. Nature and ecological implications of pathogen-induced systemic resistance in conifers: A novel hypothesis. Physiol & Mol Plant Path. In Press. Boone, C. K., D.L. Six, Y. Zheng,& K.F. Raffa. Exploitation of microbial symbionts of bark beetles by parasitoids and dipteran predators. Subm. to Ecol. Entomol. Brunelle, A., G. Rehfeldt, B. Bentz and S. Munson. Submitted. Holocene records of Dendroctonus bark beetles in subalpine pine forests of Idaho and Montana. Forest Ecology and Management. Cardoza, Y. J., K. D. Klepzig & K. F. Raffa. 2006. Bacteria in oral secretions of an endophytic insect inhibit antagonistic fungi. Ecol. Entomol. In Press. Cardoza, Y. J., S. Paskewitz & K. F. Raffa. 2006. Traveling through time and space on wings of beetles: A tripartite insect-fungi-nematode association. Symbiosis. 41: 71-79. Cook, S., S. Cherry, K. Humes, J. Guldin & C. Williams. Accepted with revision. Development of a satellite-based hazard rating system for Dendroctonus frontalis Zimmermann (Coleoptera: Scolytidae) in the Ouachita Mountains of Arkansas. J. Econ. Entomol. Delalibera I., Jr., Vasanthakumar, A., Burwitz, BJ, Schloss, PD, Klepzig, KD, Handelsman J & K.F. Raffa, Composition of the bacterial community in the gut of the pine engraver beetle, Ips pini (Say) (Coleoptera: Curculionidae: Scolytinae). Subm. to Eviron. Entomol. Delalibera, I. Jr., A. Vasanthakumar, B.J. Burwitz, P.D. Schloss, K.D. Klepzig, J. Handelsman and K.F. Raffa. 2006. Gut bacterial composition of the pine engraver beetle, Ips pini (Say) Coleoptera: Curculionidae: Scolytinae). Envir. Entomol.: Submitted. Erbilgin N, Storer AJ, Wood DL, Gordon TR. 2005. Colonization of cut branches of five coniferous hosts of the pitch canker fungus by Pityophthorus spp. (Coleoptera: Scolytidae) in central, coastal California. Can Ent. 137: 337-349. Erbilgin, N., E. Christiansen, P. Krokene, G. Zeneli & J. Gershenzon. 2006. Exogenous application of methyl jasmonate elicits defenses in Norway spruce (Picea abies) and reduces host colonization by the bark beetle Ips typographus. Oecologia. 148: 426-436. Erbilgin, N., N. Gillette, D. Owen, L. Merrill, R. Campos, T.M. Montiel, J. Sun, J. Stein, K. F. Raffa & D.L. Wood. Attraction of Dendroctonus valens to a common host volatile across a broad range of its native North American and in its introduced Asian regions. J Chem Ecol. In Press. Erbilgin, N.E. Gillette, J.D. Stein, J.H. Sun, D.R. Owen, R. Campos, L.D. Merrill, K.F. Raffa, S. Mori And D.L. Wood. Attraction of Dendroctonus valens to a common host volatile across a broad range of its native North American and in its introduced Asian regions. J. Chem. Ecol. In press. Hansen, E.M., B.J. Bentz, A.S. Munson, J.C. Vandygriff, and D.L. Turner. 2006. Evaluation of funnel traps for estimating tree mortality and associated population phase of spruce beetle in Utah. Canadian Journal of Forest Research 36:2574-2584. Hofstetter, R.W., J.B. Mahfouz, K.D. Klepzig & M.P. Ayres. 2005. Effects of tree phytochemistry on the interactions among endophloedic fungi associated with the southern pine beetle. J. Chem. Ecol. 31:551-572. Hofstetter, R.W., J.T. Cronin, K.D. Klepzig, J.C. Moser & M.P. Ayres. 2006. Antagonisms, mutualisms, and commensalisms affect outbreak dynamics of the southern pine beetle. Oecologia 145:000-000. Hofstetter, R.W., K.D. Klepzig, J.C. Moser, and M.P. Ayres. 2006. Seasonal dynamics of mites and fungi and their effects on the southern pine beetle. Env. Entomol. 35:22-30. Hofstetter, R.W., T.D. Dempsey, K.D. Klepzig, and M.P. Ayres. 2006. Temperature-dependence of symbiotic ractions among fungi, mites and the southern pine beetle. Appl. Env. Microbiol.: Submitted. Hood, S. and B.J. Bentz. Accepted. Predicting post-fire Douglas-fir beetle attacks and tree mortality in the northern Rocky Mountains. Canadian Journal of Forest Research. Jacobi, W. R., Koski, R. D., Harrington, T.C. and Witcosky, J. J. 2007. Association of Ophiostoma novo-ulmi with Scolytus schevyrewi Semenov (Scolytidae) in Colorado. Plant Disease. In press Kersten, P. J. , Kopper, B. J. , Raffa, K. F. & B. L. & Illman. High Performance Liquid Chromatography of Abietanes: Application to Diterpene Resin Acid Analysis in Conifers. J. Chem. Ecol. In press. Klepzig, K.D. 2006. Melanin and the southern pine beetle-fungus symbiosis. Symbiosis 40: 137-140 Maroja, L. S., S. M. Bogdanowicz, K. F. Wallin, K. F. Raffa & R. G. Harrison. Phylogeography of spruce beetles (Dendroctonus rufipennis Kirby) (Curculionidae:Scolytinae) in North America: distinctive mtDNA lineages associated with different species of host trees. Subm. to Molecular Ecol. McPherson BA, Mori SR, Wood DL, Storer AJ, Svihra P, Kelly NM, Standiford RB. 2005. Sudden oak death in California: Disease progression in oaks and tanoaks. For Ecol & Manag. 213: 71-89. Mock, K.E., B. J. Bentz, E. M. ONeill, J. P. Chong, Wilcox, and M. E. Pfrender. In Press. Landscape-scale genetic variation in a forest outbreak species, the mountain pine beetle (Dendroctonus ponderosae). Molecular Ecology. Økland, B., A. Liebhold, O. Bjørnstad, N. Erbilgin, & P. Krokene. 2005. Are bark beetle outbreaks less synchronous than forest Lepidoptera outbreaks? Oecologia. 146: 365-372 Owen DR, Wood DL, Parmeter JR. 2005. Association between Dendroctonus valens and black stain root disease on ponderosa pine in the Sierra Nevada of California. Can. Ent. 137: 367-375. Rasmussen, J. G.., J. Moller, B. H. Aukema, K.F. Raffa, & J. Zhu. Bayesian inference for multivariate point processes observed at sparsely distributed times. Subm. to Royal Statistical Society series B. Regniere, J. and B.J. Bentz. Submitted. Modeling cold tolerance in the mountain pine beetle, Dendroctonus ponderosae. Journal of Insect Physiology. Salle, A, & K.F. Raffa. Interactions among intraspecific competition, emergence patterns, and host selection behaviour in Ips pini (Col. Scolytinae). Ecol. Entomol. In Press. Sandoval, S.J., S.P. Cook, F. Merickel & H. Osborne. In press. Diversity of the beetle (Coleoptera) community captured at artificially created snags of Douglas-fir and grand fir within harvested stands. Pan Pacif. Entomol. Schloss, P. D., I. Delalibera Jr, J. Handelsman, and K. F. Raffa. 2006. Bacteria associated with the guts of two wood-boring beetles: Anoplophora glabripennis and Saperda vestita (Cerambycidae). Environ. Entomol. 35: 625-629. Shirley, B.M. & S.P. Cook. In press. Repellency of Conophthorus ponderosae Hopkins (Coleoptera: Scolytidae) by the host monoterpene myrcene. West. J. Appl. For. Six, D.L. and B.J. Bentz. Accepted. Temperature determines symbiont abundance in a multipartite bark beetle-fungus ectosymbiosis. Microbial Ecology. Vasanthakumar, A, I. Delalibera Jr., J. Handelsman, K. D Klepzig P. Schloss & K. F Raffa. 2006. Characterization of gut-associated microorganisms in larvae and adults of the southern pine beetle, Dendroctonus frontalis Zimmerman. Environ. Entomol. In press. Wager, D.J., and Baker, F.A. 2006. Ozone concentrations in Utah's Central Wasatch Mountains. J.Air and Waste Mgmt. 56:1381-1390. Wulder, M., J. White, B. Bentz, F. Alvarez, and N. Coops. 2006. Estimating the probability of mountain pine beetle red-attack damage. Remote Sensing of Environment 101:150-166. Wulder, M., J. White, B. Bentz, T. Ebata. 2006. Augmenting the existing survey hierarchy for mountain pine beetle red-attack damage with satellite remotely sensed data. The Forestry Chronicle 82(2):187-202. Zhu, J., J. G. Rasmussen, J. Moller, B. H.Aukema & K.F. Raffa. Spatial-temporal modeling of forest gaps generated by colonization from below- and above- ground bark beetle species. Subm. to J. American Statistical Association A&CS. Presentations: Aukema, B. A. Carroll, J. Zhu, K. F. Raffa, T. Sickley & S. Taylor Entomological Society of America National Meetings. 2006. Landscape ecology of mountain pine beetle (Dendroctonus ponderosae) in British Columbia, Canada: Are land tenure and outbreak epidemiology linked?? Indianapolis, IN. Barto EA, Herms DA, Bonello P, Cipollini DF (2006) Defense protein responses of white and green ash to wounding and emerald ash borer homogenates. Annual Meeting of the Ecological Society of America, Memphis, TN Beam, R.D.Jennifer G. Klutsch, William R. Jacobi, & José F. Negrón. Stand and Fuel Characteristics of Mountain Pine Beetle and Southwestern Dwarf Mistletoe in Colorados Northern Front Range Ponderosa Pine. Oral Presentation at the Western International Forest Disease Work Conference, Graduate Student Panel- Oct 2006-Smithers, B.C. Canada Beam, R.D. Jennifer G. Klutsch, William R. Jacobi, & José F. Negrón. Stand and Fuel Characteristics of Mountain Pine Beetle and Dwarf Mistletoe in Colorados Northern Front Range Ponderosa Pine. Poster Presentation at the North American Forest Insect Work Conference- May 2006-Ashvelle, NC. Bentz, B.J. and G. Schen-Langenheim. 2006. Critical impacts in high elevation five-needle pine ecosystems, the mountain pine beetle. Whitebark Pine: A Pacific Coast Perspective, Ashland, OR, August. Bentz, B.J., M. Pfrender, R. Bracewell and K. Mock. 2006. Genetic architecture of fitness trait differences among geographically separated populations of Dendroctonus ponderosae. 3rd Workshop on Genetics of Bark Beetles and Associated Microorganisms. Asheville, NC. May. Cardoza Y. J., S. Paskewitz, & K. F. Raffa New perspectives on the southern pine beetle-microbial symbiosisEntomological Society of America National Meetings. 2006. Travelling through time and space on wings of beetles: A tripartite insect-fungi-nematode association. Indianapolis, IN.. Cipollini DF, Barto EA, Eyles A, Bonello P, Herms DA (2006) Constitutive and wound-inducible defense proteins in phloem of ash trees. Emerald Ash Borer Research and Technology Development Meeting, Cincinnati, Ohio Cook, S.P & B.M. Shirley. 2006. Relationship between forest nutrition and insects. Intermountain Forest Tree Nutrition Cooperative Annual Meeting. Moscow, ID. Cook, S.P. 2006. Impact of forest management practices on selected insect populations. Clearwater Resource Conservation and Development Council, Annual Private Landowner Conference. Moscow, ID. Cook, S.P. 2006. Relationship between forest management nutrition and insects. Inland Empire Forest Engineering Conference. Moscow, ID. Cook. S.P. 2006. Host nutrition and bark beetles: fertilization impacts on tree resistance and suitability. Western Forest Genetics Association Annual Meeting. Anchorage, AK. Erbilgin N. Investigations of insect-pathogen-tree interactions in new and old world forests.. Department of Environmental and Forest Biology, State University of New York, Syracuse, New York. 2006 Erbilgin, N. G. Zeneli, E. Christiansen, J. Gershenzon, P. Krokene Methyl jasmonate-mediated induced plant resistance affects host selection processes of Ips typographus on Norway spruce, Picea abies.. Western Forest Insect Work Conference, Victoria, BC, Canada. 2005. Erbilgin, N. D. L. Wood, T. R. Gordon, A. J. Storer. Phoresy rates and spore loads of an exotic pathogen, Fusarium circinatum, on native bark beetles induce resistance to F. circinatum in natural Monterey pine forests.. California Forest Pest Council Meeting. Woodland, California. 2006 Erbilgin, N. D. L. Wood, T. R. Gordon, A. J. Storer.Phoresy rates and spore loads of an exotic pathogen, Fusarium circinatum, on native bark beetle taxa in natural Monterey pine forests-implications for evolving tree resistance. Exotic/Invasive Pests and Disease Research Workshop. Davis, California. 2005. Erbilgin, N. G. Zeneli, E. Christiansen, J. Gershenzon, P. Krokene Exogenous application of methyl jasmonate elicits defenses in Norway spruce (Picea abies) and reduces host colonization by the bark beetle Ips typographus.. 2006. North American Forest Insect Work Conference. Asheville, North Carolina. 2006. Erbilgin, N. How to use the knowledge gained in plant-insect-pathogen interactions against the most serious insect pests of North American forests.. Departmental Seminar. Division of Plant and Soil Sciences. West Virginia University. Morgantown, West Virginia. 2006 Erbilgin, N. N. E. Gillette, D. R. Owen, J. N. Webster, D. L. Wood, J. D. Stein Verbenone-releasing flakes protect whitebark pine from attack by mountain pine beetle. Greater Yellowstone Coordination Committee.. Jacksonhole, Wyoming. 2006. Erbilgin, N. N. E. Gillette, J. D. Stein, D. R. Owen, R. Campos, L. D. Merrill, K. F. Raffa, S. Mori, D. L. Wood.Geographic variation in semiochemical attraction, fungal associates and genetic diversity of Dendroctonus valens in North America and China: Implications to forest heath. North Central Forest Pest Workshop, LaCrosse, Wisconsin. 2005. Erbilgin, N. Tree-partite interactions among insects-pathogen-tree in new and old world forests.. Departmental Seminar. Department of Forestry. University of Wisconsin, Stevens Point, Wisconsin. 2006. Erbilgin, N., A. J. Storer, G. R. Owens, S. Kirkpatrick, K. Bischel, D. L. Wood, T. R Gordon. Studies of phoresy of Fusarium circinatum on potential beetle vectors.. Pacific Branch of Entomological Society of America. Monterey, California. 2005. Erbilgin, N., D. L. Wood, T. R. Gordon, A. J. Storer. How symbioses between an invasive exotic pathogen and native bark beetles may influence the success of all involved?. North American Forest Insect Work Conference. Asheville, North Carolina. 2006. Erbilgin, N., D. L. Wood, T. R. Gordon, A. J. Storer. Interactions between an exotic pathogen and native beetles induce resistance in native Monterey pines Pacific Branch of Entomological Society of America. Maui, Hawai'i. 2006 Erbilgin, N., D. L. Wood, T. R. Gordon, A. J. Storer. Phoresy rates and spore loads of an exotic pathogen, Fusarium circinatum, on native phloeophagous and xyloephagous beetle taxa in natural Monterey pine forests-implications for evolving tree resistance. Annual Conifer Defenses Symposium. Jena, Germany. 2005. Erbilgin, N., D. L. Wood, T. R. Gordon, A. J. Storer.Phoresy rates and spore loads of an exotic pathogen, Fusarium circinatum¸ on native phloeophagous and xyloephagous beetle taxa in natural Monterey pine forests: Implications for evolving plant resistance. International Union of Forest Research Organizations on Bark Beetles. Prince George, BC, Canada. 2005. Erbilgin, N., D.L. Wood .Interactions between vectoring efficacy of insects and resistance of host trees to an exotic pathogen: A quantitative approach for determining host resistance.. Multistate Research Committee (W-1187): Interactions among Bark Beetles Pathogens, and Conifers in North American Forests. Columbus, Ohio. 2005. Erbilgin, N., N. E. Gillette, J. D. Stein, D. R. Owen, R. Campos, L. D. Merrill, K. F. Raffa, S. Mori, D. L. Wood.Geographic variation in response of Dendroctonus valens to host volatiles of Pinus spp.: A holarctic perspective. International Society of Chemical Ecology Meeting. Washington, D.C. 2005. Erbilgin, N.Managing forest resources by integrating knowledge learned from studies of insect-pathogen-tree interactions in new and old world forests.. Department of Renewable Resources, University of Alberta, Edmonton, Canada. 2006 Erbilgin. N. Understanding the complexity of interactions among plant, insect, pathogen may help us to manage forest resources. Departmental Seminar. Department of Entomology. Purdue University. West Lafayette, Indiana. 2005. Eyles A, Wallis CM, Chorbadjian R, Herms DA, Cipollini DF, Bonello P (2006) Host-mediated cross induction of systemic induced resistance between a pathogen and an insect in Austrian Pine. Annual Meeting of the American Phytopathological Society, Quebec City, Quebec, Canada. Gillette, N. E. J. D. Stein, N. Erbilgin, D. R. Owen, D. L. Wood Control of western pine beetle, Dendroctonus brevicomis, populations using aeriallyapplied verbenone flakes.. International Society of Chemical Ecology Meeting. Washington, D.C. 2005. Gillette, N. E. N. Erbilgin, D. R. Owen, J. N. Webster, D. L. Wood, J. D. Stein.Verbenone flakes protect ponderosa pines from attack by Dendroctonus brevicomis. Western Forest Insect Work Conference. Victoria, BC, Canada. 2005. Gillette, N. S. Mori, D.R. Owen, J.D. Stein, N. Erbilgin, D.L. Wood, J.N. Webster, C. Mehmel. New pheromone release systems: Aerial and ground applications for bark beetle control. Forest Vegetation Management Conference. Redding, California. 2006. Klepzig, K. ,C. Yuceer, Young-Min Kang, O. Pechanova, Y. Cardoza, A. Vasanthakumar & K. Raffa Ceratocystis and Ophiostoma: Expanding Frontiers. Brisbane Australia. Aug. 2006. Klutsch, J.G., R.D. Beam, W.R. Jacobi, J.F. Negron. 2006. Effects of dwarf mistletoe on fuel complexes in ponderosa pine on the Colorado Front Range. Poster Presentation, 12th Annual Front Range Student Ecology Symposium; 2006 March 8, Fort Collins, CO. Colorado State University. Klutsch, J.G., R.D. Beam, W.R. Jacobi, J.F. NegrÌn. 2005. Stand characteristics and fuel loads of dwarf mistletoe and mountain pine beetle in Colorados Northern Front Range ponderosa pine (poster). In Guyon, J.C. comp. 2006 Proceedings of the 53rd Annual Western International Forest Disease Work Conference; 2005 September 26-30, Jackson, WY. U.S. Department of Agriculture, Forest Service, Intermountain Region, Odgen UT. Klutsch, J.G., R.D. Beam, W.R. Jacobi, J.F. NegrÌn. 2006. A preliminary evaluation of fuel levels in southwestern dwarf mistletoe and mountain pine beetle infested ponderosa pine (oral presentation). 2007 Proceedings of the 54th Annual Western International Forest Disease Work Conference (in press); 2006 October 2-6, Smithers, BC, Canada. Klutsch, J.G., R.D. Beam, W.R. Jacobi, J.F. NegrÌn. 2006. Stand characteristics and fuel loads in ponderosa pine infested with southwestern dwarf mistletoe in Colorados Northern Front Range (poster). APS/CPS/MSA Joint Meeting; 2006 July 29  August 2, Quebéc City, QC, Canada. Abstracts of Presentations, Phytopathology 96:S62. Krokene, P. N. Erbilgin, E. Christiansen. Methyl jasmonate interferes with host colonization and reproduction in the spruce bark beetle. Annual Conifer Defenses Symposium. Jena, Germany. 2005. Krokene, P. N. Erbilgin, E. Christiansen Induced defences in conifers against bark beetles and fungi.. The 8th European Congress of Entomology. Izmir, Turkey. 2006. McPherson, B. A. N. Erbilgin, D. L. Wood, P. Svihra, A. J. Storer New relationships among the sudden oak death pathogen, native bark and ambrosia beetles, and decay fungi colonizing oaks.. Annual Exotic/Invasive Pests and Disease Research Workshop in California. Riverside, California. 2006 McPherson, B. A. ,N. Erbilgin, D. L. Wood, P. Svihra, A. J. Storer The attraction of saprotrophic ambrosia and bark beetles (Coleoptera: Scolytidae) to coast live oaks (Quercus agrifolia) infected by Phytophthora ramorum.. Entomological Society of America. Indianapolis, Indiana. 2006. McPherson, B. A. N. Erbilgin, R. B. Standiford, D. L. Wood, P. Svihra, A. J. Storer. Sudden Oak Death Symposium The response of saprotrophic beetles to coast live oaks infected with Phytophthora ramorum.. Monterey, California. 2005. McPherson, B. A. N. Erbilgin, R. B. Standiford, D. L. Wood, P. Svihra, A. J. Storer. The response of saprotrophic beetles to coast live oaks infected with Phytophthora ramorum. Sudden Oak Death Symposium. Monterey, California. 2005. McPherson, B. A., N. Erbilgin, D.L. Wood The role of ambrosia and bark beetles in sudden oak death.. California Forest Pest Council Meeting. Woodland, California. 2006. McPherson, B. A.,N. Erbilgin, D. L. Wood, P. Svihra, A. J. Storer, F. Ockels, P. Bonello. The influence of the introduced pathogen Phytophthora ramorum on saprotrophic beetle (Coleoptera: Scolytidae) host selection behavior. International Society of Chemical Ecology Meeting. Washington, D.C. 2005. McPherson, B.A. N. Erbilgin, D.L. Wood .Interactions between oak-infesting bark beetles and sudden oak death pathogen.. Multistate Research Committee (W-1187): Interactions among Bark Beetles Pathogens, and Conifers in North American Forests. Columbus, Ohio. 2005 McPherson, B.A., D. L. Wood, A. J. Storer, P. Svihra, N. Erbilgin Responses of scolytid beetles to coast live oaks infected with Phytophthora ramorum, cause of sudden oak death.Pacific Branch of Entomological Society of America. Monterey, California. 2005. Okland, B., N. Bjørnstad, O. Skarpaas, N. Christian Stenseth, N. Erbilgin Spatiotemporal dynamics of introduced bark beetles: Implications to resource competition, invasion risk and management.. International Union of Forest Research Organizations: Alien Invasive Species and International Trade. Radom, Poland. 2006. Owen, D. R., N. Gillette, N. Erbilgin, N. Webster, J. D. Stein, S. Mori, M. Hansen, G. Fiddler, J. N. Webster, L. Pederson, D.L. Wood.Efficacy of verbenone flakes for area-wide and individual tree protection from attack by mountain pine beetles. California Forest Pest Council Meeting. Woodland, California. 2006 Powell, J. and B. Bentz. 2006. Connecting phenology predictions with population growth rates for an outbreak insect. North American Forest Insect Work Conference, Asheville, NC, May. Raffa, K. F. & J. Handelsman. Symbiosis Symposium, June, 2006., Symbioses in conifer bark beetle systems. Madison WI.. Raffa, K. F. , K. L. Maroja, S. Bogdanowicz, K. Wallin, & R. Harrison Third Bark Beetles Genetics Work Conference, May, 2006. Phylogeography of Dendroctonus rufipennis based on mtDNA and microsatellites. . Asheville, NC. Rebek E, Herms DA, Smitley D, Bonello P, Cipollini DF (2006) Interspecific variation in ash resistance to emerald ash borer. Entomological Society of America, North Central Branch annual meeting, University of Illinois, Bloomington, IL Shirley, B.M., P.J. Zambino & S.P. Cook. 2006. Longevity of Ophiostoma sp. spores on three Scolytid species found in Pinus contorta (Laws) and Pinus ponderosa. Entomol. Soc. Amer. Natl. Meeting. Indianapolis, IN (presented by B. Shirley). Vasanthakumar, A , J. Handelsman, & K.F. Raffa. North American Forest Insect Work Conference, 2006. Gut microflora of a wood-boring invasive insect, the emerald ash borer. Asheville, NC... Vasanthakumar, A., Y. Cardoza, I. Delalibera, P. Schloss, C. Currie, J. Handelsman, K. Klepzig, & K. F. Raffa Third Bark Beetles Genetics Work Conference, May, 2006. Gut bacteria of bark beetles and wood borers.. Asheville, NC. Wallis CM, Eyles A, Bonello P (2006) Searching for signaling molecules involved in the systemic induced resistance phenomenon in Austrian pine. 2006 PMBB Symposium, Wooster, Ohio, p 34 Wallis CM, Eyles A, Chorbadjian R, Hansen R, Cipollini DF, Herms DA, Bonello P (2006) Relationships of phloem chemistry with systemic resistance to Sphaeropsis sapinea in Austrian pine subjected to different fertility levels and insect defoliation. Southwide & Northeast Forest Disease Workshops Wang D, Eyles A, Bonello P (2006) Systemic aspects of host-pathogen interactions in austrian pine (Pinus nigra): a proteomics approach. 2006 PMBB Symposium, Wooster, Ohio Wilson, G.M., K. Humes, S. Cook, C. Randall, D. Long & K. Allen. 2006. Detection and mapping of mountain pine beetle infestations. 11th Biennial Remote Sens. Conf. Salt Lake City, UT (presented by G. Wilson). Wood, D. L. R. Silverstein, N. Gillette, N. Erbilgin Pheromones, kairomones and allomones in Scolytidae: From discovery to application (Program Symposium). Entomological Society of America. Indianapolis, Indiana. 2006 Zeneli, G., E. Christiansen, N. Erbilgin, J. Gershenzon, P. Krokene Multiple attacks against multiple defences: Bark beetles and blue-stain fungi vs. terpenoids and phenolics in Norway spruce.. 2006. Forstwissenschaftliche Tagung 2006 Ökosystem Wald  Rohstoff Holz  Prinzip Nachhaltigkeit (Forest ecosystems-Wood raw materials-Sustainability Principles). Dresden, Germany. 2006. Zeneli, G., J. Gershenzon, N. Erbilgin, E. Christiansen, P. Krokene.Enemies at the gate: Terpenoids and defense against spruce bark beetle (Ips typographus). G Association for Medicinal and Aromatic Plants from Southeast European Countries Conference. Bacu, România. 2006.
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