Brief Summary of Minutes of Annual Meeting

Short-term outcomes: Members of this working group were highly productive and impactful in 2018. The following are the outcomes or benefits of selected projects:

• Based on studies by research team at Washington State University, recommendations on disease management and storage conditions have potentially reduced 40 to 60% in postharvest losses caused by Botrytis gray mold on stored peony flowers.
• Studies on the prevalence of foliar diseases on noble firs at various elevations have increased the production of healthy, high quality noble fir boughs.
• Beech leaf disease was first detected in 2012 in northeastern Ohio. The disease is now affecting forest areas in Ohio, Pennsylvania, New York State, and Ontario, Canada. The etiology of this disease is poorly know, and the team at Ohio State University has reviewed and produced a publication summarizing the current state of knowledge and management of this disease.
• Emerald ash borer continues to be an important invasive pest species. Multiple working group members are working on this pest. Studies have demonstrated that management of emerald ash borer, when initiated early in the season and through “halo effect”, can improve tree health and reduce future management costs. Natural enemies of emerald ash borer can also contribute to overall decline in the pest abundance and damage. Studies on host resistance also suggested that drought stress can predispose otherwise resistant tree species to attack, and provided a framework for understanding future invasion biology of other pests.
• Survey of elm bark beetle diversity across the country will not only provide information on the diversity and distribution of existing elm bark beetle species, it will also determine the current diversity of the invasive banded elm bark beetles.
• Nearly all of the Japanese beetle grubs infected with microsporidian Ovavesicula popilliae die between October and May in Michigan. When the results of this experiment are combined with previous research on the proportion of adults that are infected at an active site, and the reduction in eggs produced by infected females, we can estimate that the total annual population reduction due to popilliae is 25% (egg reduction in infected females) + 30% (infected larvae that die) = 55%. The results demonstrated that the microsporidian is a potential biological control agent of Japanese beetle, an invasive species.

Outputs: This working group has contributed to the understanding and management of new and emerging pests, improvement and refinement pesticide technologies and biological control to key pests, and publication of scientific and extension products in 2018. Much of the achievements and outputs were outlined in the annual meeting minutes and in the publication list. The following are some significant examples of this working group’s outputs.

• Works conducted at Washington State University has gathered evidence that not all Botrytis species found on poenies in Alaska are pathogenic. Efficacy data have been gathered to demonstrate the effectiveness of new “reduced-risk” and biopesticides in controlling foliar diseases on bulb crops, and that 5-second dip of peony flower buds in fludioxonil provide effective control of Botrytis This team also conclusively demonstrated that 1°C is the optimal temperature for storage (for disease prevention and maximizing shelve life) of poenies.
• Display trials of noble fir wreaths demonstrated that elevation, harvest time, and time in cold storage did not affect wreath quality, and that consumers preferred wreaths with a darker blue-green color than lighter green.
• Beech leaf disease is lethal to American beech trees but currently poorly diagnosed. A publication has been produced on the review of this disease and to be published in the journal Forest Pathology in 2019.
• Studies at Ohio State University demonstrated that drought stress increases survival and development of emerald ash borer larvae on coevolved Manchurian ash and implicates phloem-based traits in resistance.
• Research team at Purdue University is finding some evidence for a halo protective effect caused by the treatment of nearby ash trees that slow the predicted overall rate of mortality. Three-year efficacy continues to be demonstrated 6 years after a treatment. The study demonstrated that treatment of even just a few trees can have benefits to nearby untreated trees.
• Laboratory feeding studies and field bolt studies in IL, utilizing Asian and European ash taxa indicate the Asian ashes, mandschurica, F. mandschurica var. japonica, F. chinensis var. rhynchophylla, F. chinensis, and F. anomala, and the European ash F. angustifolia consistently appear to be less susceptible to adult leaf feeding and colonization by EAB larvae. Additional laboratory and field studies indicate a number of Asiatic elm species and complex hybrids (i.e. ‘Danada Charm’ and ‘Triumph’) are not suitable for feeding by adult EABs.
• A survey of elm bark beetle diversity has been conducted in several member states in 2018. Preliminary data suggested that at some locations the Scolytusspecies infesting elm has shifted from the old invasive ( multistriatus) to the new invasive (S. schevyrewii) and by the time it gets into the Rocky Mountain region the newer species appears to have extirpated the original.
• In a study on evaluating the effectiveness of microsporidian as a biological control agent of Japanese beetle in Michigan, the survival of healthy grubs at a location without popilliae was 78.0% compared with a survival rate of 48.6% for grubs at a location where O. popilliae is active. Another useful outcome of this experiment is that we were able to infect healthy grubs by putting them into soil from a site where O. popilliae is active.

Activities: This working group has conducted collaborative and independent research and extension activities to achieve objectives outlined in the original proposal and to produce outcomes and outputs outlined in this report. For example,

• Research team lead by Gary Chastagner of Washington State has conducted experiments to assess the pathogenicity of new Botrytis species found on peonies in Alaska, established seven field trials to examine the effectiveness of new “reduced-risk” and biopesticides in controlling foliar diseases on bulb crops, studied the effectiveness of fungicide dip in controlling Botrytis on poeny flowers, and determined the optimal storage temperature for poenies.
• Another project at Washington State University evaluated the relationships between foliar diseases and noble fir bough production by determining the prevalence of foliar diseases on noble firs at various elevations, and at varying storage conditions and harvest time. Consumer preference was also surveyed.
• Research team at the Ohio State University, led by Enrico Bonello, continues to work on diagnosing and understanding the etiology beech leaf disease.
• Efforts to understand the relationships between environmental stress and host plant resistance, with emerald ash borer as a model organism, continues.
• A study on the “halo effect” of managing emerald ash borer (led by Cliff Sadof) is entering its sixth year. The study included treatment of 1200 trees are various locations in Indiana, and the infestation and mortality of treated and untreated ash trees was assessed.
• An ongoing assessment of Asian and European ash taxa for susceptibility to emerald ash borer is led by Fredric Miller and ongoing at the Morton Arboretum in IL. Samples of ash trees were taken regularly to assess survival of beetle larvae and parasitism.
• A survey of elm bark beetles diversity is currently ongoing, and led by Whitney Cranshaw. Surveys are conducted in several NCERA-224 member states: CO, IL, MI, MN, SC and TN. Sampling for 2018 has been completed, and samples are been identified and analyzed.
• Japanese beetle grubs were collected from two locations in Michigan (led by Dave Smitley), one location with known popilliae (microsporidian) infestation and the other does not. The grubs were them assigned to treatment where grubs from each location were paired with grubs from the other location or the same location. The infection level of the white grubs was then determined by dissection.

Milestones: In 2019, members of this working group will

• Continue to conduct independent research projects to understand and manage new and emerging pests, to improve and refine pesticide technologies and biological control to key pests, and to support registration of additional pest management products.
• Continue to publish scientific and extension products, either independently or collaboratively.
• Make additional efforts to improve diagnosis of beech leaf disease, blue spruce decline, and other important diseases.
• Continue surveys for various bark and ambrosia beetles and wood boring insects. Survey for elm bark beetles will continue in 2019, and expand the survey area to include additional states that are not in the 2018 survey.
• Further develop and refine collaborative project proposals presented during the 2018 annual meeting.

The following is a partial list of the publications produced by working group members in 2018:

Books

Hansen, E.M., K.J. Lewis, and G.A. Chastagner (eds). 2018. Compendium of Conifer Diseases. Revised Second Edition. APS Press. Saint Paul, MN.

Book Chapters

Chastagner, G.A., J.M. van Tuyl, M. Verbeek, B. Miller, and B.B. Westerdahl. 2017. Diseases of Lily. In: Plant Disease Management. Handbook of Florist's Crops Diseases. R.J. McGovern and W.H. Elmer (eds). Springer Int.

Garfinkel, A., and G.A. Chastagner. 2018. Diseases of Peony. In: Plant Disease Management. Handbook of Florist's Crops Diseases. R.J. McGovern and W.H. Elmer (eds). Springer Int.

Hanks, G., and G.A. Chastagner. 2018. Diseases of Daffodil. In: Plant Disease Management. Handbook of Florist's Crops Diseases. R.J. McGovern and W.H. Elmer (eds). Springer Int.

Refereed Journal Articles

Beckerman, J. and Perras, P. 2018. Comparison of fungicides for control of Botrytis blight of geranium, 2016. Plant Disease Management Reports OT013.

Beckerman, J. 2018. Comparison of preventative versus curative application of fungicides for control of Botrytis blight of geranium, 2017. Plant Disease Management Reports 12:

    OT016.

Beckerman, J. 2018. Evaluation of fungicides for management of black root rot of vinca, 2017. Plant Disease Management Reports 12:OT015.

Beckerman, J. 2018. Comparison of curative applications of fungicides for control of powdery mildew of zinnia, 2017. Plant Disease Management Reports 12:OT014.

Beckerman, J. 2018. Evaluation of fungicides for management of black root rot of pansy, 2016. Plant Disease Management Reports 12:OT017.

Beckerman, J. 2018. Efficacy of Empress Intrinsic and BAS703 to control black root rot on pansies, 2014. Plant Disease Management Reports 12:OT018.

Beckerman, J. 2018. Evaluation of fungicides for management of black root rot of pansy, 2015. Plant Disease Management Reports 12:OT019

Conrad A, McPherson BA, Lopez-Nicora H, D’Amico KM, Wood DL, Bonello P. 2019. Artificial inoculation and natural infection reveal long term disease progression and phenotypic patterns in the coast live oak/sudden oak death pathosystem. Forest Ecology and Management 433: 618-624.

Elliott, M., J. Yuzon, M. Malar, S. Tripathy, M. Bui, G.A. Chastagner, K. Coats, D.M. Rizzo, M. Garbelotto and T. Kasuga. 2018. Characterization of phenotypic variation and genome aberrations observed among Phytophthora ramorum isolates from diverse hosts. BMC Genomics (2018) 19:320 https://doi.org/10.1186/s12864-018-4709-7.

Fayyaz A, Bonello P, Tufail MR, Amrao L, Habib A, Talib Sahi ST. 2018. First report of citrus withertip (tip dieback), a disease complex caused by Colletotrichum siamense and Lasiodiplodia iraniensis on Citrus reticulata cv. Kinnow in Punjab, Pakistan. Plant Disease DOI: 10.1094/PDIS-04-18-0576-PDN.

Griffin, JJ., W. R. Jacobi, G. McPherson, C.S. Sadof, J.R. McKenna, M.L. Gleason, N.W. Gauthler, D. A. Potter, D.R. Smitley, G. C. Adams, A.B. Grould, C. R. Cash, J.A. Walla, M.C. Starrett, G. Chastagner, J.L. Sibley, V.A. Krischik, and A.F. Newby. 2017. Ten-year performance of the United States National Elm Trial. Arbor. and Urban Forestry 43:107-120

López-Goldar X, Villari C, Bonello P, Borg-Karlson AK, Sampedro, L, Zas R. 2018. Inducibility of plant secondary metabolites predicts genetic variation in resistance against a key insect herbivore in maritime pine. Frontiers in Plant Science - Functional Plant Ecology – DOI: 10.3389/fpls.2018.01651.

Mason CJ, Keefover-Ring K, Villari C, Klutsch J, Cook S, Bonello P, Erbilgin N, Raffa KF, Townsend PA. 2018. Anatomical defenses against bark beetles relate to degree of historical exposure between species and are allocated independently of chemical defenses within trees. Plant, Cell, and Environment – DOI: 10.1111/pce.13449.

McKeever, K.M. and G. Chastagner. 2018. Interactions between root rotting Phytophthora, Abies Christmas trees, and environment. Plant Disease

Posted online on 25 Sep 2018, First Look. https://apsjournals.apsnet.org/doi/pdfplus/10.1094/PDIS-01-18-0174-RE

Munck IA, Bonello P. 2018. Modern approaches for early detection of forest pathogens are sorely needed in the United States. Forest Pathology – DOI: 10.1111/efp.12445.

Pepori AL, Michelozzi M, Santini A, Cencetti G, Bonello P, Gonthier P, Sebastiani F, Luchi N (2018). Comparative transcriptional and metabolic responses of Pinus pinea to a native and a non-native Heterobasidion species. Tree Physiology – DOI: 10.1093/treephys/tpy086.

Quesada, C. R. , A. R Witte, C. S. Sadof. 2018. Factors influencing insecticide efficacy against armored and soft scales. HortTechnology 28:267-275.

Rigsby CM, Villari C, Peterson DL, Herms DA, Bonello P, Cipollini D. 2018. Girdling increases survival and growth of emerald ash borer larvae on Manchurian ash. Agricultural and Forest Entomology – DOI: 10.1111/afe.12292.

Showalter DN, Raffa KF, Sniezko RA, Herms DA, Liebhold AM, Smith JA, Bonello P (2018). Strategic development of tree resistance against forest pathogen and insect invasions in defense-free space. Frontiers in Ecology and Evolution – Conservation 6 – DOI: 10.3389/fevo.2018.00124.

Showalter DN, Villari C, Herms DA, Bonello P (2018). Drought stress increased survival and development of emerald ash borer larvae on coevolved Manchurian ash and implicates phloem-based traits in resistance. Agricultural and Forest Entomology 20: 170-179.

Smitley, D., Hotchkiss, E. and K. Buckley. 2018. Natural epizootics of Ovavesicula popilliae lag behind outbreaks of Japanese beetle, Popillia japonica, in Michigan by at least 10 years. Biological Control. (submitted 1-15-18).

Villari C, Dowkiw A, Enderle R, Ghasemkhani M, Kirisits T, Kjaer E, Marčiulynienė D, McKinney L, Metzler B, Muñoz F, Rostgaard Nielsen L, Pliūra A, Stener L-G, Suchockas V, Rodriguez-Saona L, Bonello P, Cleary M (2018). Advanced spectroscopy-based phenotyping offers a potential solution to the ash dieback epidemic. Nature Scientific Reports 8:17448 – DOI:10.1038/s41598-018-35770-0.

Poster Presentations

Coats, K., A. Garfinkel and G. Chastagner. 2018. Novel sequencing reveals diagnostic assay of MAT1-1 and MAT1-2 mating type idiomorphs in Botrytis paeoniae. APS Pacific Division Meeting. Portland, OR. (Poster presentation).

DeWald, L.E., M. Elliott, R. Sneizko, and G.A. Chastagner. 2018. Geographic and local genetic variation in Pacific madrone leaf blight. Sixth International Workshop on the Genetics of Tree-Parasite Interactions: Tree Resistance to Insects and Diseases: Putting Promise into Practice. Ohio. (Poster presentation).

DeWald, L.E., M. Elliott, R. Sneizko, G.A. Chastagner and J.R. Russell. 2018. Genetic variation in Pacific Madrone (Arbutus menziesii): Early results of a multiple site common garden study. SAF Convention, Portland, OR. (Poster presentation)

Elliott, E., and G. Chastagner. 2018. Steaming as a method of eradicating Phytophthora ramorum in soil. APS Pacific Division Meeting. Portland, OR. (Poster presentation).

Garfinkel, A. and G. Chastagner. 2018. Multiple new pathogens revealed in a survey of peony diseases in the United States. APS Pacific Division Meeting. Portland, OR. (Poster presentation).

Popular Articles

Chastagner, G. 2018. Improving postharvest needle retention on cut Christmas trees. Lookout 51(2): 7-9.

Chastagner, G. 2018. Washington’s Collaborative fir germplasm evaluation (CoFirGE) project test plot. Christmas Tree Lookout: 51(2): 30- 33.

Chastagner, G., and B. Cregg. 2018. Christmas Tree Promotion Board supports Christmas tree research programs. Christmas Tree Lookout: 51(1).

Garfinkel, A., and G. Chastagner. 2018. A survey of peony diseases in the Central and Eastern United States. Cut Flower Quarterly 30(3): 24-27.

Other Creative Works

Callan, B. and G. Chastagner. 2018. Atropellis canker. P. 89-90. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Callan, B., and V. Talgø; revised by E. Hansen, G. Chastagner, and V. Talgø. 2018. Other canker diseases. P. 93-99. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. 2018. Procerum Root Disease. P. 26-27. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. 2018. Thyronectria canker on Abies spp. Christmas trees. P. 76-77. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. 2018. Cyclaneusma needle cast. P. 119-120. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. 2018. Interior needle blight on Abies spp. Christmas trees. P. 130. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G., and E. Hansen. 2018. Herpotrichia needle browning. P. 127-128. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. and J. LeBoldus. 2018. Web blight. P. 128-130. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. and V. Talgø. 2018. Grovisella canker. P. 91-93. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. and V. Talgø. 2018. Botrytis blight. P. 126-127. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. and V. Talgø. 2018. Current season needle necrosis. P. 130-132. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G., and V. Talgø. 2018. Rhizosphaera needle cast in Christmas trees. P. 134-135. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G., and V. Talgø. 2018. Stigmina needle cast on Christmas trees. P. 135-136. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G. and V. Talgø. 2018. Diseases of conifers grown as Christmas trees. P. 158-162. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Chastagner, G., J. O’Donnell, and B. Cregg. 2018. Fall needle drop (Interior needle yellowing). P. 147-148. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Dwinell, L.D. and E.G. Kuhlman; revised by T.R. Gordon, G. Reynolds, J.A. Smith and G. Chastagner. 2018. Pitch canker. P. 83-85. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Garbelotto, M., P. Gonthier, and G. Chastagner. 2018. Heterobasidion root and butt rot. P. 33-35. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Hansen, E.M., K.J. Lewis, and G.A. Chastagner. 2018. Diseases of conifers. P. 1-4 In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Hansen, E., V. Talgø, and G. Chastagner. 2018. Needle and broom rusts. P. 102-107. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Hellgren, M., J. Stenlid, and G. Chastagner. 2018. Scleroderris canker. P. 87-89. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Hunt, R.; revised by R. Hunt, A. Shoettle, and G. Chastagner. 2018. White pine blister rust. P. 57-60. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

McKeever, K. and G. Chastagner. 2018. Phytophthora Root Rot, Stem Canker, and Shoot Blight in Christmas Trees. P. 20-22. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Mota, M., C. Vicente, M. Espada, P. Vieira, and Chastagner, G. 2018. P. 29-32. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Omdal, D. C.G. Shaw, III, and G. Chastagner. 2018. Armillaria root disease. P. 35-38. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Peterson, R.S., and G. Chastagner. 2018. Gymnosporangium stem rusts. P. 71-73. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Powers, H., and G. Kuhlman. Revised by K. Lewis, and G. Chastagner. 2018. Fusiform Rust. P. 61-62. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Stone, J. and G. Chastagner. 2018. Other foliage diseases of Abies spp. p. 132-133. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Talgø, V. and G. Chastagner. 2018. Neonectria canker on Abies Christmas trees. P. 75-76. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Talgø, V. and G. Chastagner. 2018. Delphinella shoot blight on Christmas trees. P. 90-91. In: Compendium of Conifer Diseases. Revised Second Edition. E.M. Hansen, K.J. Lewis, and G.A. Chastagner (eds). APS Press. Saint Paul, MN.

Garfinkel, A and G. Chastagner. 2018. Peony (Paeonia spp.)-Anthracnose. In: Plant Disease Management Handbook. C.M. Ocamb and J.W. Pscheidt (eds.). Oregon State University, Corvallis, OR 97331 https://pnwhandbooks.org/plantdisease/host-disease/peony-paeonia-spp-anthracnose

Media Story - Research identifies new fungi causing ugly disease in peonies. WSU Insider, December 21, 2017. https://news.wsu.edu/2017/12/21/peonies/

Media Story - New Botrytis species for Alaska. HortAlaska, October 28, 2017 https://alaskapeony.wordpress.com/2017/10/28/new-botrytis-species-for-alaska/

Media Story - Peonies from heaven. Washington State Magazine. Fall 2018. https://magazine.wsu.edu/2018/08/06/peonies-from-heaven/

Scientific and Outreach Oral Presentations.

Bonello P. 2018. A conceptual framework and practical solutions to forest invasions by PIPs. Continental dialogue on non-native forest insects & diseases 14th meeting, Irvine, CA. Nov. 6-7. Invited speaker.

Bonello P. 2018. A conceptual framework and practical solutions to forest invasions by PIPs. Halvor Solheim Forest Pathology Symposium, As, Norway. Nov. 2.

Bonello P. 2018. Defense responses of Austrian pine to two opportunistic pathogens of contrasting aggressiveness under combined drought and temperature stress. OSU-USP-RU Tripartite Collaborative Meeting, Columbus, OH. Oct. 25.

Bonello P. 2018. Defense responses of Austrian pine to two opportunistic pathogens of contrasting aggressiveness under combined drought and temperature stress. International Union of Forest Research Organizations International Workshop - Tree resistance to insects & diseases: putting promise into practice. Mount Sterling, OH. Aug. 8.

Bonello P. 2018. A conceptual framework for solutions to black swan events in forest health. Escola Superior de Agricultura Luiz Queiroz, University of São Paulo, Piracicaba, SP, Brazil. May 21. Invited speaker.

Bonello P, Conrad A, Slot J, Visser EA, Naidoo S. 2018. Defense responses of Austrian pine to two opportunistic pathogens of contrasting aggressiveness under combined drought and temperature stress. The 6th International Workshop on the Genetics of Tree-Parasite Interactions – Tree Resistance to Insects and Diseases: Putting Promise into Practice. Mt. Sterling, OH. Aug. 5-10.

Bonello P, Liu D, Nahar N, Rodriguez-Saona L, Shearer S, Stewart C, Stewart L, Wang G.-L. 2018. Aerial plant disease surveillance by spectral signatures. Annual meeting of the Grand Challenges Program, Bill and Melinda Gates Foundation. Berlin, Germany. Oct. 14-18.

Chastagner, G. 2018. Overview of a Potpourri of Disease Control Trials on Peonies, Tulips, Daffodils, & Gladiolus. Wilbur-Ellis Professional Markets Technical Seminar. Puyallup, WA.

Chastagner, G. 2018. Optimizing Disease Management on Christmas Trees. Wilbur-Ellis Professional Markets Technical Seminar. Puyallup, WA.

Chastagner, G. 2018. Research update on ways to improve pre-and postharvest control of Botrytis. Annual Alaska Peony Grower Association Conference, Anchorage, AK.

Chastagner, G. 2018. Overview of Phytophthora Root Rot and the CoFirGE Project. PCTGA Short Course, State College, PA

Chastagner, G. 2018. Strategies to improve the postharvest quality of Christmas trees. PCTGA Short Course, State College, PA

Chastagner, G., and M. Quintanilla. 2018. Soil Borne Disease and Nematode Management. MSU Ornamental Nursery and Christmas Tree Production Webinar Series.

Chastagner, G. 2018. Overview of Sudden Oak Death (Phytophthora ramorum) in WA. Washington Native Plant Society - South Sound Chapter Meeting, Olympia, WA.

Chastagner, G., and M. Elliott. 2018. Overview of the Ornamental Program at WSU Puyallup. T & L Nursery Meeting, Redmond, WA

Chastagner, G. 2018. WSU - WSDA Cooperative projects in plant pathology. Olympia, WA.

Chastagner, G. 2018. Progress on WSDA NAC Funded WSU Puyallup Projects. Kent, WA

Chastagner, G. 2018. Potential new tools to manage diseases on peonies, tulips, daffodils, iris, and lilies. Bulb and Cut Flower Field Day, Puyallup, WA.

Chastagner, G. 2018. Steaming Green Waste. WSDA Skype meeting.

Chastagner, G., and M. Elliott. 2018. WSU Puyallup Yard Waste Steaming Demo. Puyallup, WA

Chastagner, G. 2018. Genetic Screening to Improve Postharvest Needle Retention of Cut Christmas Trees and Greenery. IHC2018. Istanbul, Turkey

Chastagner, G., and A. Garfinkel. 2018. Multiple pathogens revealed in a survey of peony diseases in the United States. NCSU 2018 Kanuga Ornamental Workshop on Diseases and Insects. Hendersonville, NC.

Chastagner, G., and C. Landgren. 2018. Rhizoctonia Web blight on Christmas trees in the U.S. Pacific Northwest. NCSU 2018 Kanuga Ornamental Workshop on Diseases and Insects. Hendersonville, NC.

Conrad A, Villari C, Sniezko R, Rodriguez-Saona L, Bonello P. 2018. Development of a tool for rapid identification of resistant trees in species affected by alien invasive pathogens. The 6th International Workshop on the Genetics of Tree-Parasite Interactions – Tree Resistance to Insects and Diseases: Putting Promise into Practice. Mt. Sterling, OH. Aug. 5-10.

Conrad AO, Sniezko R, Rodriguez-Saona L, Bonello P. 2018. Application of chemical fingerprinting as a tool to screen trees for resistance against invasive and non-native. 29th USDA Interagency Research Forum on Invasive Species. Annapolis, MD. January 9-12.

Conrad A, Sniezko R, Rodriguez-Saona L, Bonello P. 2018. Developing a phenotyping tool for disease resistance using Fourier transform infrared (FT-IR) and Raman spectroscopy. International Congress of Plant Pathology, Boston, MA, July 29-August 3.

Ewing C, Bonello P. 2018. Identifying the causal agent of the emerging beech leaf disease epidemic. OARDC Annual Conference. Wooster, OH, April 27.

Ewing C, Bonello P. 2018. What is causing the emerging beech leaf disease? 29th USDA Interagency Research Forum on Invasive Species. Annapolis, MD. January 9-12.

Rigsby, CM, Body M, Showalter DN, Muhamed A, Casagrande RA, Bonello P, Schultz JC, Appel HM, Keefover-Ring K, and Preisser EL. 2018. The identification of resistance markers and chemical characterization of eastern hemlocks persisting in hemlock woolly adelgid-decimated forests. 29th USDA Interagency Research Forum on Invasive Species. Annapolis, MD. January 9-12.

Smitley, D. 2017. Regional publications on best management practices for street trees and pollinators. Protecting Pollinators in Urban Landscapes Conference, Traverse City, MI, Oct. 10, 2017.

Smitley, D. 2017. Long-term biological control of Japanese beetle with Ovavesicula popilliae. Invited speaker in Japanese beetle symposium, ESA National Mtg., Denver, CO, Dec. 7, 2017.

Smitley, D. 2017. Marketing ecosystem services provided by food plants for pollinators. Professional Plant Propagators National Conference, Grand Rapids, MI October 13, 2017.