Dr. Richard W. Hofstetter  (Return to Homepage)

 

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          Professional Talks and Presentations (* invited)

 

     Principle Presenter and Lead Author

  1. Hofstetter, R.W., D. Dunn, D. Pureswaran, and B. Sullivan. Acoustic signals and aggression among bark beetles. Western Forest Insect Work Conference, Spokane, WA. March 2009.
  2. Hofstetter, R.W. Bark beetles research in the southwest U.S. Western Forest Insect Work Conference, Spokane, WA. March 2009.
  3. Hofstetter, R.W., D. Dunn, D. Pureswaran, and B. Sullivan. Reproductive isolation mechanisms in two sympatric bark beetles: Acoustic signals.  Ent. Soc. Amer. Reno, NV. November 2008.
  4. *Hofstetter, R.W. Ecological role of fungi and mites in beetle population dynamics and evolution. Canadian Forest Service, Fredericton Canada. October 30, 2008.
  5. *Hofstetter, R.W., J.C. Moser, D.M. Reboletti, E.A. Alden, and T.S. Davis. Have phoretic mites influenced the evolution of insect-microbial symbiosis in bark beetle systems? Western Forest Insect Pest Workshop. Boulder, Colorado. April 2008.
  6. Hofstetter, R.W., A. Garcia, J. Moan, J. Mafouz, S. Smith, C.  Edminster. Pinus ponderosa resistance to bark beetles in the southwest: Effects of fire and resin composition. Pacific ESA Branch Meeting, Portland OR April 2007.
  7. Hofstetter, R.W. M.L. Gaylord, S. Martinson & M.R. Wagner. Influence of tree volatiles on cross attraction of Ips and Dendroctonus and their predators in Arizona. Western Forest Insect Work Conf. Poster presentation. Boise, Idaho. March 5-9, 2007.
  8. *Hofstetter, R.W., J.C. Moser, K.D. Klepzig, and M.P. Ayres. The role of mites in beetle-fungal interactions. Ceratocystis and Ophiostoma Meeting. North Stradbroke Island, Brisbane Australia.  August 16-18, 2006
  9. *Hofstetter, R.W. Effects of fire and thinning management on tree susceptibility and resistance to insect-vectored pathogens.  TPTC FABI Annual Meeting, May 2006. Pretoria, South Africa
  10. Hofstetter, R.W., E. Aldan, J.C. Moser, B.D. Ayres and B.E. Steed. Regional differences in phoretic mites associated with the bark beetle Ips pini. Poster. NAFIWC Asheville, NC May 2006.
  11. Hofstetter, R.W., J. Mahfouz, J. Moan, and C. Edminster. Can high phenotypic and genotypic diversity of Pinus ponderosae regulate bark beetle populations? Poster. NAFIWC Asheville, NC May 2006.
  12. *Hofstetter, R.W. The mysterious world of bark beetles, mites and fungi.  Forestry Seminar Series, Northern Arizona University. Flagstaff, Arizona. April 2006.
  13. Hofstetter, R.W., Z. Chen, M. Gaylord, & M. Wagner. Influence of host volatiles as pheromone synergists for southern and western pine beetle in Arizona. Ent. Soc. Am.National Meeting. Ft Lauderdale 2005
  14. Hofstetter, R.W., E. Aldan, J.C. Moser, & K. Clancy. Phoretic mites associated with bark beetles and their predators in ponderosa pine. Ent. Soc. Am.National Meeting. Ft Lauderdale 2005
  15. Hofstetter, R.W., L. Evans, T. Dempsey, & M.P. Ayres.  Temperature-dependent interactions among beetles, mites and fungi.  Western Forest Insect Work Conference, Victoria, British Columbia. 2005.
  16. Hofstetter, R.W., M.R. Wagner, T.E. DeGomez & J.D. McMillin. Pine bark beetle situation in Arizona. Western Forest Insect Work Conference, Victoria, British Columbia. 2005.
  17. *Hofstetter, R.W. Complex interactions among beetles, mites and fungi. International Congress of Entomology. Brisbane, Australia. 2004. (also Session moderator).
  18. *Hofstetter, R.W. Linking ecology and evolution: Mite-fungal-beetle interactions in the southern and Mexican pine beetle communities. Western Forest Insect Work Conference. San Diego, CA 2004
  19. Hofstetter, R., M. Ayres, K. Klepzig & J. Moser. Evaluating the importance of multiple drivers in outbreak population dynamics. Ecological Society of America Nat. Meeting, Savannah, GA. August 2003.
  20. Hofstetter, R.W., J. Moser, K. Klepzig & M. Ayres.  Community ecology of the Mexican pine beetle (D. mexicanus) in Arizona. Entom. Society of America Annual Meeting. Fort Lauderdale, Fl. Nov. 2002.
  21. Hofstetter, R.W., K. Klepzig, J. Moser & M.P. Ayres. Epidemiology of Southern Pine Beetle-Fungal Interactions. International Congress of Mycology. Oslo, Norway. August 2002
  22. Hofstetter, R.W., M.P. Ayres, J. Moser & K. Klepzig.  Hitchhikers and their baggage: Consequences of phoretic mites on bark beetles.  Entomological Society of America. Student Competition. Fort Lauderdale, Fl. November 2002.
  23. Hofstetter, R.W., M.P. Ayres & K. Klepzig.  Can mites impact the fungal composition in bark beetle communities? Western Forest Insect Work Conference. Whitefish, Montana. April 2002
  24. Hofstetter, R.W., K. Klepzig, M.P. Ayres & J. Moser. Symbiotic associations and the ecology of the southern pine beetle. Ecological Society of America Annual Meeting. Madison, WI. August 2001.
  25. Hofstetter, R.W., K. Klepzig, M.P. Ayres & J. Moser. The Population dynamics and ecology of the southern pine beetle. North American Forest Insect Pest Workshop. Edmonton, Alberta. 2001.
  26. Hofstetter, R.W., M.P. Ayres & P. Lorio. Interactions between beetle attack rate and pine tree defenses produce positive density dependence in D. frontalis. International Congress of Entomology. Iguassu, Brazil. August 2000. (NSF Travel Award)
  27. Hofstetter, R.W., K. Klepzig, M.P. Ayres & J. Moser. Fungus-mite associations and the population dynamics of Dendroctonus frontalis. Entom. Soc. of America Annual Meeting. Montreal, Canada. Dec. 2000.
  28. Hofstetter, R.W., M.P. Ayres, P. Lorio, K. Klepzig. Impact of plant defenses on the population dynamics of D. frontalis. Ecological Society of America, Snowbird, Utah. August 2000. 
  29. Hofstetter, R.W., M. Lombardero, M.P. Ayres & P.L. Lorio. Impact of resin flow on the population dynamics of the Southern Pine Beetle. Entomological Society of America National Meeting. Atlanta, GA.1999.
  30. Hofstetter, R.W., M. Lombardero, M.P. Ayres, K. Klepzig & J. Moser. Population dynamics of the Southern Pine Beetle. North Central Pest Council Meeting. Plymouth meetings. March 1999.
  31. Hofstetter, R.W., M.P. Ayres & K.D. Klepzig. Nutritional value of loblolly pine phloem for symbiotic fungi of the southern pine beetle, as related to tree growth status.  Entomology Society of America National Meeting. Las Vegas, NV. 1998.
  32. Hofstetter, R.W. & P.J. Landolt. Induced defensives in potato plants: Colorado Potato foraging behavior.  Annual Potato Commission Meeting. Pullman, WA. 1998.
  33. Hofstetter, R.W. & Landolt, P.J. .  Codling moth larval attractants and repellants.  Washington State Tree Fruit Commission: Apple Review.  Yakima, WA. 1998.
  34. Hofstetter, R.W. & K. F. Raffa. Biological control of the gypsy moth in the great lakes region.  Annual Gypsy Moth Review. Traver City, MI. 1995.
  35. Hofstetter, R.W. & K. F. Raffa.  Ecology and impact of the gypsy moth.  NC-212 meetings. Representative for the State of Wisconsin. Columbus, OH 1994, & Madison, WI. 1995.
  36. Hofstetter, R.W. & K. F. Raffa. Physical effects and internal cues influencing oviposition behavior by the gypsy moth egg parasitoid Ooencyrtus kuvanae. Entomological Society of America National Meeting, Dallas, TX.1994.

    Author, but not presented

     
    1. Taerum, S., M.P.Ayres, R.W. Hofstetter, K.D. Klepzig, and D. Six.  High bluestain fungus (Ophiostoma minus) abundance negatively affects outbreaks of the southern pine beetle, Dendroctonus frontalis.  International Congress of Entomology, Durban, Australia. July 2008.
    2. Taerum, S., M.P.Ayres, R.W. Hofstetter, K.D. Klepzig, and D. Six.  Causes and consequences of variation in the growth rates of blue stain fungi (Ophiostoma minus) associated with the southern pine beetle (Dendroctonus frontalis). IURFO. Pretoria, Australia. July 2008.
    3. Gaylord, M.L., R.W. Hofstetter, S. Sky Stephens, and M.R. Wagner. Global change, vegetation management and pine bark beetles: elevational gradients as a surrogate predictor of forest and bark beetle response. International Congress of Entomology, Durban, Australia. July 2008.
    4. *Hofstetter, R.W., T.S. Davis (presenter), and K.D. Klepzig. Indirect interactions: competition among fungal mutualists from sympatric and allopatric bark beetle populations. International Congress of Entomology, Durban, Australia. July 2008.
    5. Waring, K.M., D.M. Reboletti, L.A. Mork, C-H Huang, R.W. Hofstetter, A.M. Garcia, P.Z. Fulé, T.S. Davis. Southern and Mexican pine beetle and climate change: An assessment of potential ecological and economic effects of a range shift. ESA Annual Meeting. Milwaukee WI. August 2008.
    6. Fischer, M.J., K.M. Waring, R.W. Hofstetter, and T.E. Kolb. Resin composition and growth characteristics of ponderosa pine associated with attack by the roundheaded pine beetle (Coleoptera: Scolytidae). Fort Valley Experimental Station Conference. Flagstaff, AZ. May 2008
    7. Garcia, A.M., R.W. Hofstetter, and  S.L. Smith. Effects of burn season and fire injury on the quantity and quality of ponderosa pine resin. WFIWC. Boulder Colorado. April 2008.
    8. >Reboletti, D. and R.W. Hofstetter. Mite Associates of the Mountain Pine Beetle. WFIWC, Boulder Colorado. April 2008.
    9. Davis, T.S. and R.W. Hofstetter. Fitness, fecundity, and competition: interactions among sympatric primary bark beetles. WFIWC. Boulder Colorado. April 2008.
    10. Waring, K.M., D.M. Reboletti, L.A. Mork, R.W. Hofstetter, A.M. Garcia, P.Z. Fulé, T.S. Davis. Inconvenient Pest: Evaluating the ecological and economic consequences of range shift of Dendroctonus mexicanus (Coleoptera: Scolytidae). NCEAS meeting. Santa Barbara. Feb 2008.
    11. Garcia, A.M., R.W. Hofstetter, and S.L. Smith. Effects of seasonal fires on the susceptibility and resistance of Pinus ponderosa to bark beetles. Fire in the Southwest:  Integrating Fire into Management of Changing Ecosystems. Tuscon, AZ. Jan. 2008.
    12. Gaylord, M.L., R.W. Hofstetter, and M.R. Wagner. Effects of thinning on bark beetle movement. Fire in the Southwest:  Integrating Fire into Management of Changing Ecosystems. Tuscon, AZ. Jan. 2008.
    13. Waring, K.M., D.M. Reboletti, L.A. Mork, R.W. Hofstetter, A.M. Garcia, P.Z. Fulé, T.S. Davis. An Inconvenient Pest: Potential spread of a non-native bark beetle: ecological and economic consequences. Poster presentation.  9th Biennial Colorado Plateau Meeting. Flagstaff October 30, 2007.
    14. Six, D.L., K.D. Klepzig, and R.W. Hofstetter. Geographic variation in fungi associated with the southern pine beetle, Dendroctonus frontalis.  IUFRO meeting, Vienna Austria, Sept. 2007.
    15. Gaylord M.L., R.W. Hofstetter & M.R. Wagner. Mechanistic understanding of the impacts of thinning ponderosa pine on pine bark beetles. Student presentation. Western Forest Insect Work Conference. March 5-9, 2007.
    16. Hayes, C.J., R.W. Hofstetter, and T.E. DeGomez.  Factors influencing pine engraver colonization and development in ponderosa pine slash in northern Arizona. Student presentation. Western Forest Insect Work Conference. March 5-9, 2007.
    17. Reboletti, D. & R.W. Hofstetter.  Multiple associations: Mountain pine beetle, mites and fungi. Student presentation. Western Forest Insect Work Conference. March 5-9, 2007.
    18. Davis, T.S., R.W. Hofstetter & K.D. Klepzig. Battle of the beetles: Interspecific interactions between primary Dendroctonus species. Student presentation. Western Forest Insect Work Conference. March 5-9, 2007.
    19. Alden, E., R.W. Hofstetter, J. Moser, D. Six, & C. Edminster. Identifying the mites and fungal community members of Dryocoetes confusus in northern Arizona. Poster. Western Forest Insect Work Conference. March 5-9, 2007.
    20. Klepzig, K.D., R.W. Hofstetter, et al. Ecology of microbial and arthropod associates of southern pine beetles. N.A.U. Forestry Seminar Series.  Nov. 29, 2006.
    21. Ayres, M.P., R.W. Hofstetter, et al. When 'isms collide: mutualisms, commensalisms and antagonisms among plant enemies. N.A.U. Forestry Seminar Series. September 30, 2006.
    22. Ayres, M.P., N.A. Friedenberg, R.W. Hofstetter, M.J. Lombardero, K.D. Klepzig, & J.C. Moser. Phoretic mites and the population dynamics of bark beetles. International Congress of Acarology, Amsterdam, The Netherlands. 21-26 August 2006.
    23. Taerum, S.J., K.D. Klepzig, R.W. Hofstetter, D.L. Six, J.C. Moser & M.P. Ayres. Interspecific interactions among symbionts associated with two populations of southern pine beetles. Poster. NAFIWC. Asheville, NC, 2006.
    24. Gaylord, M.L., K. Williams, R.W. Hofstetter, J.D. McMillin, T. DeGomez, and M.R. Wagner. Flight temperature thresholds for southwestern ponderosa pine bark beetles. Poster. NAFIWC. Asheville, NC, 2006.
    25. Klepzig, K.D., M.P. Ayres, R.W. Hofstetter, M.J. Lombardero, J.C. Moser. 2005. Pestis Symbiotica: Symbiosis red in tooth and claw. Western Forest Insect Work Conference. San Diego, CA.
    26. Klepzig, K.D., R.W. Hofstetter, J.C. Moser, & M.P. Ayres. 2004. Mutualism and antagonism in bark beetle-fungal-mite interactions International Congress of Entomology. Brisbane, Australia.
    27. Ayres, M.P., R.W. Hofstetter, M.F. Lombardero, K. Klepzig & J.C. Moser. When ‘isms collide: Mutualism, commensalism and antagonism among plant enemies. Gordon Conference: Plant-Insect Interactions California 2004.
    28. Ayres, M., R. Hofstetter, K. Klepzig & J. Moser. Consequences of symbioses for populations and communities: The case of bark beetles and their fungal mutualists. 4th International Symbiosis Society Congress. Halifax, Nova Scotia. August 2003.
    29. Klepzig, K.D., J.C. Moser, M.J. Lombardero, M.P. Ayres & R.W. Hofstetter. Mutualism and Antagonism: Ecological interactions among bark beetles, mites and fungi. British Society of Plant Pathology Meeting. London, England 1999.
    30. Ayres, M.P., J. Veysey, M. Lombardero, R. Hofstetter, K. Klepzig & J. Moser. Community interactions and the population ecology of D. frontalis. Entomological Society of America. National Meeting, Atlanta, GA. 1999.
    31. Ayres, M.P., R.W. Hofstetter, M.J. Lombardero, B. Smith & J.M. Pye. Regional patterns in forest epidemiology of the southern pine beetle. Entomology Society of America National Meeting. Las Vegas, NV. 1998.
    32. Raffa, K.F., S.C. Kruse, R.W. Hofstetter, J.J. Kruse, A. Chenot, & J. Powell.  The ecology and impact of gypsy moth invasion.  NC-212. 1998.