Dr. David R. Coyle

Dr. David R. Coyle

Postdoc - Forest Health Outreach
Southern Regional Extension Forestry
University of Georgia, Athens, GA 30602

Email: drcoyle@uga.edu or dcoyle@sref.info
Twitter: @drdavecoyle


Forest health and invasive species outreach and education program (http://southernforesthealth.net/). I run a Forest Health and Invasive Species Program for the southeastern U.S. I create, curate, and provide materials for extension education for southern pine health, primarily focusing on pine stand management to mitigate potential insect and disease issues, as well as for several non-native species, including (but not limited to) emerald ash borer, hemlock woolly adelgid, redbay ambrosia beetle, gypsy moth, thousand cankers disease, laurel wilt, sirex woodwasp, Chinese privet, and cogongrass.  Our target audience will encompass both rural and urban communities, including “absentee” landowners and underserved and underprivileged populations.  This project will integrate workshops, town hall-type meetings, traditional publications and hardcopy material, and new technologies (including webinars, social media, and other eLearning materials) in order to reach a wide range of audience.  Working with the Southern Regional Extension Forestry group (www.sref.info) will facilitate the efficient compilition and dissemination of necessary information.  The goal is to create materials and curriculum that can be used across Region 8, and to ensure consistent education among state and local extension agents with regard to pine health, non-native species ecology, and forest pest management in the southeastern U.S.

Research Interests:

1. Factors affecting forest health. Tree health is affected by many factors, including soil quality and characteristics, slope, aspect, water and nutrient availability, competing vegetation, non-native species, stand density, and insects and fungi. Often, several of these factors act together - either concurrently or sequentially - and contribute to reductions in tree health. As part of a large interdisciplinary team comprised of entomologists, pathologists, soil scientists, foresters, forest health specialists, and social scientists, from the University of Georgia, the USDA Forest Serivice, and state agencies, we are investigating factors related to pine health in the Piedmont and Coastal Plain regions of Georgia and Alabama. In addition to determining fine-scale abiotic influences on tree health, interactions between fungal-vectoring insects and fungi and their attractants, we are examining landowner perceptions and behavior related to pine management. Our goal is to relate tree growth to various abiotic and biotic factors, and be able to make management recommendations to landowners.

2. Belowground-aboveground interactions. Rhizophagy and folivory have very different effects on tree growth, allometry, and physiology, as well as the relative attractiveness of a tree to other herbivores. Often, stressed trees are attacked first by root-feeding insects and their associated fungi, which can weaken the tree and predispose it to aboveground herbivory. I am investigating factors that attract root-feeding Hylastes spp., Hylobius spp., and Pachylobius spp. beetles to pine trees, and the relationship between aboveground tree condition and susceptibilty to these herbivores. Examining the effects of water stress on these interactions is an area I would like to explore, as is the relative contribution of insects (below and aboveground) to the carbon (C) cycle. Currently, most models of C dynamics either do not include insect activity, or use artificially-girdled trees as a surrogate for insect mortality. Along with a tree physiologist (Dr. Doug Aubrey, University of Georgia - Savannah River Ecology Lab) and biogeochemist (Dr. Kim Novick, Indiana University) we have proposed to conduct a controlled field study to determine the influence of insects on tree C cycling and budgets.

3. Stand management as a method to improve health. The Southern Pine Beetle Prevention and Restoration Program has been successful in assisting land owners with changing stand structure to reduce susceptibility to SPB. However, we don't know exactly what level of management is optimal for reducing susceptibility to tree-killing insects. Evidence suggests that thinned stands are less susceptible to outbreaking insects such as SPB and the Sirex woodwasp. I am interested in different ways to use various silvicultural regimes to prevent pest outbreaks.

4. Effects of non-native species on community diversity. It has long been stated that non-natives (aka exotics, invasives) have detrimental effects on naive communities, and this relationship has been shown for many plant species. However, these relationships are less well-known for arthropods. I am in the preliminary stages of this work, and am examining data sets at the local, regional, and national level to determine the effects of non-natives on community diversity.


Education and Experience

Forest Health Associate, 2015 - present. Southern Regional Extension Forestry, University of Georgia, Athens, GA. Dr. William G. Hubbard, advisor.

Postdoctoral Research Associate, 2011 - 2015. D.B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA. Dr. Kamal J. K. Gandhi, advisor.

Ph.D., 2011. University of Wisconsin, Madison, WI. Major: Entomology. Dissertation research examined the ecology and impact of root feeding weevils (Coleoptera: Curculionidae) on sugar maple seedling growth in a northern hardwood forest. Dr. Kenneth F. Raffa, advisor. Co-Advised by Dr. William J. Mattson, Jr., USDA Forest Service.

Biological Science Technician, 2000 - 2004. USDA Forest Service, Southern Research Station, Center for Forested Wetlands Research, Charleston, SC. Lead technician for the Short Rotation Woody Crops Cooperative Research Program examining the effects of resource amendment treatments on tree production and physiology. Dr. Mark D. Coleman, supervisor.

M.S., 2000. Iowa State University, Ames, IA. Co-Majors: Entomology and Forestry. Thesis research examined cottonwood leaf beetle, Chrysomela scripta (Coleoptera: Chrysomelidae), larval performance on poplar clones and the effect of larval defoliation on foliar phagostimulants in intensively-managed Populus plantations. Dr. Elwood R. Hart and Dr. Richard B. Hall, advisors.

B.A., 1997. Luther College, Decorah, IA. Major: Biology. Senior research project tested the relative efficacy of four baits for carrion beetle (Coleoptera: Silphidae) sampling. Dr. Kirk J. Larsen, advisor.


Research Description

Current Research: I am a forest ecologist that examines abiotic and biotic factors and their impacts on forest health and functioning.  Currently, I am working on factors that affect pine health issues in southeastern pine forests.  Some areas in the region are experiencing pine dieback, but as of yet the reasons behind this phenomenon are unclear.  As part of an interdisciplinary team comprised of University, State, and Federal personnel, I am examining soil characteristics, insects, and fungi, and combining these data with tree growth and stand history to determine the root cause of pine health issues.  In collaboration with Ms. Christiane Helbig, an International Scholar from Germany, I am investigating the biology of several species of root weevils, and looking at the role they play in fungal vectoring and pine health.  I am also leading a survey to examine landowner and manager knowledge and perceptions of pine health issues so that we can better focus our educational efforts.

I am also interested in the ecological effects of non-native species, and their impacts on native insect communities.  In collaboration with Dr. Louise Loudermilk (USDA Forest Service) we recently showed that a very high proportion of non-native individuals in a managed hardwood forest occur – much higher than would be expected.  Further, examining several different insect taxa, our data show that as the proportion of non-native individuals in a community increases, the diversity of that community decreases.  I am still actively working in this area to determine the ecological ramifications of non-native species in forest communities.

Previous Research: Optimizing forest production via water and nutrient amendments. A 55 acre research plantation containing eastern cottonwood, sweetgum, sycamore, and loblolly pine was established in spring 2000 (Coleman et al. 2004) at the Savannah River Site near Aiken, SC, for the purpose of determing the effects of resource amendments (fertization and irrigation) on tree growth, biomass, and nutrient partitioning. Results from eastern cottonwood and sycamore (Coyle and Coleman 2005) and sweetgum and loblolly pine (Coyle et al. 2008) showed that fertilization was the primary driver of growth. We have completed a complete above and belowground nutrient budget through year 4 (Aubrey et al. 2012), as well as determined the optimal level of nutrient amendments for each of these species (Coyle et al. 2013). The final whole tree destructive harvests and nutrient analyses were recently completed, and we will be evaluating full-rotation growth, biomass and nutrient allocation, and nutrient budgets of these tree species.

Investigating a scale/pathogen complex related to white pine dieback in the Southern Appalachians. White pine is an economically and ecologically important tree species throughout eastern North America. Recently, increased mortality of seedlings, saplings, and mature trees has been observed in the Appalachian Mountains. A scale insect was discovered, and through molecular and taxonomic identification we have determined that this species appears to be new to the southern Appalachians. We are investigating its affect on tree survival and canker formation, as well as interactions between the scale and several fungi. This work is in collaboration with Ms. Ashley Schultz (former M.S. student in the Gandhi lab), Dr. Chris Asaro (USDA Forest Service), and several personnel from the USDA Forest Service.

Landscape-level stand management tactics to control southern pine beetle (SPB).  SPB is the single most destructive forest pest in the southeastern U.S. In collaboration with University, State, and Federal personnel I have evaluated stands across the southeastern U.S. that had undergone various types of thinning, prescribed burns, and longleaf pine replants, and recording several parameters related to stand structure in an effort to mitigate the detrimental effects of SPB outbreaks.  Our recent paper (Nowak et al. 2015) showed that area-wide management can greatly reduce forest susceptibility to SPB outbreaks.

Dissertation Research: A suite of invasive weevils (Coleoptera: Curculionidae) is established in the northern Great Lakes region (Coyle et al. 2008). Using field and laboratory experiments, I evaluated the effects of root weevil feeding on tree health and growth in the northern hardwood ecosystem. Phyllobius oblongus feeds primarily on sugar maple, Acer saccharum; populations are heavy in northern Wisconsin and the Upper Peninsula of Michigan. Beginning in 2005, adult and larval densities were manipulated yearly in the field using weevil amendments and pesticide treatments. Sugar maple seedling health, aboveground and belowground growth, and community dynamics were recorded using minirhizotrons and traditional tree growth monitoring methodology. Annual destructive harvests were used to determine if root herbivory affected biomass and nutrient partitioning. Adult weevil phenology and host preference and performance were monitored. I monitored the effects of larval herbivory on microbe populations and biomass using phospholipid fatty acid analysis (PLFA), and investigated larval weevil overwintering physiology.

Mentoring. I have mentored students ranging from high school to PhD candidates on all aspects of forest health research. Several of my mentees have gone on to attain advanced degrees (or gone to college, in the case of the high school student). So far, research with undergraduate mentees has resulted in two peer-reviewed publications, and several more are planned based on work currently ongoing.


Book Chapters:
Nowak, J.T., K.D. Klepzig, D.R. Coyle, W.A. Carothers, and K.J.K. Gandhi.  2016.  Chapter 5, p. 73-88. Southern pine beetles in central hardwood forests: frequency, spatial extent, and changes to forest structureIn:  Natural Disturbances and Historic Range of Variation in Central Hardwood Forests.  C.H. Greenberg and B.S. Collins (eds.).  Springer Publishers, New York. 400 p.

Coyle, D.R. and K.J.K. Gandhi.  2014.  Plantation forests.  Vol. 1, p. 138-142. In: Biomes and Ecosystems: An Encyclopedia.  R.W. Howarth (ed.).  Salem Press, Pasadena, CA. 208 p.

Coyle, D.R., W.J. Mattson, and K.F. Raffa. 2008. Invasive root feeding insects in natural forest ecosystems of North America. Chapter 8, p. 134-151. In: Root Feeders: An Ecosystem Perspective. S. Johnson and P. Murray (eds.). CABI Press, London. 230 p.

Coyle, D.R., J.D. McMillin, R.B. Hall, and E.R. Hart. 2002. Deployment of tree resistance to insects in short-rotation Populus plantations. Chapter 9, p. 189-215. In: Mechanisms and Deployment of Resistance in Trees to Insects. M.R. Wagner, K.M. Clancy, F. Lieutier, and T.D. Paine (eds.). Kluwer Academic Publishers, New York. 332 p.

Refereed Journal Articles:

Avtzis, D.N., D.R. Coyle, V. Christopoulous, and A. Roques. 2017. Biological invasions, national borders, and the current state of non-native insect species in Greece and the neighboring Balka countries. Bull. Insectol. 70: 161-169. Supplemental Data

Coyle, D.R., U.J. Nagendra, M.K. Taylor, J.H. Campbell, C.E. Cunard, A.H. Joslin, A. Mundepi, C.A. Phillips, and M.A. Callaham, Jr. 2017. Soil fauna responses to natural disturbances, invasive species, and global climate change: Current state of the science and a call to action. Soil Biol. Biochem. 110: 116-133.

Coyle, D.R., G.T. Green, B.F. Barnes, K.D. Klepzig, J.T. Nowak, and K.J.K. Gandhi. 2016. Landowner and manager awareness and perceptions of pine health issues and southern pine management activities in the southeastern United States. J. For. 114: 541-551.

Helbig, C.E., D.R. Coyle, K.D. Klepzig, J.T. Nowak, and K.J.K. Gandhi. 2016. Colonization dynamics of subcortical insects on forest sites with relatively stressed and unstressed loblolly pine trees. J. Econ. Entomol. 109: 1729-1740.

Zalesny, R.S. Jr., J.A. Stanturf, E.S. Gardiner, G.S. Bañuelos, R.A. Hallett, A. Hass, C.M. Stange, J.H. Perdue, T.M. Young, D.R. Coyle, and W.L. Headlee. 2016. Environmental technologies of woody crop production systems. Bioenerg. Res. 9: 492-506.

Zalesny, R.S. Jr., J.A. Stanturf, E.S. Gardiner, J.H. Perdue, T.M. Young, D.R. Coyle, W.L. Headlee, G.S. Bañuelos, and A. Hass. 2016. Ecosystem services of woody crop production systems. Bioenerg. Res. 9: 465-491.

Pfammatter, J.A., D.R. Coyle, K.J.K. Gandhi, N. Hernandez, R.W. Hofstetter, J.C. Moser, and K.F. Raffa. 2016. Structure of phoretic mite assemblages across subcortical beetle species at a regional scale. Environ. Entomol. 45: 53-65.

Coyle, D.R., D.P. Aubrey, and M.D. Coleman. 2016. Growth responses of narrow or broad site adapted tree species to a range of resource availability treatments after a full harvest rotation. For. Ecol. Manage. 362: 107-119. Supplemental Data Corrigendum

Nowak, J.T., J.R. Meeker, D.R. Coyle, C.A. Steiner, and C. Brownie. 2015. Southern pine beetle infestations in relation to forest stand conditions, previous thinning, and prescribed burning: evaluation of the Southern Pine Beetle Prevention Program. J. For. 113: 454-462.

Coyle, D.R. C.L. Brissey, and K.J.K. Gandhi. 2015. Species characterization and responses of subcortical insects to trap-logs and ethanol in a hardwood biomass plantation. Agric. For. Entomol. 17: 258-269. Supplemental Data

Coyle, D.R., K.D. Klepzig, F.H. Koch, L.A. Morris, J.T. Nowak, S.W. Oak, W.J. Otrosina, W.D. Smith, K.J.K. Gandhi. 2015. A review of southern pine decline in North America. For. Ecol. Manage. 349: 134-148.

Lee, X., D.R. Coyle, D. Johnson, M.W. Murphy, M.A. McGeehin, R.J. Murphy, K.F. Raffa, and S.M. Paskewitz. 2014. Prevalence of Borrelia burgdorferi and Anaplasma phagocytophilum in Ixodes scapularis (Acari: Ixodidae) nymphs collected in managed red pine forests in Wisconsin. J. Med. Entomol. 51: 694-701.

Coyle, D.R., W.J. Mattson, A.L. Friend, and K.F. Raffa. 2014. Effects of an invasive herbivore at the single plant scale do not extend to population-scale seedling dynamics. Can. J. For. Res. 44: 8-16. Supplemental Data

Mech, A.M., C. Asaro, M.M. Cram, D.R. Coyle, P.J. Gullan, L.G. Cook, and K.J.K. Gandhi. 2013. Matsucoccus macrocicatrices (Hemiptera: Matsucoccidae): first report, distribution, and association with symptomatic eastern white pine in the southeastern U.S. J. Econ. Entomol. 106: 2391-2398.

Coyle, D.R., J. Pickering, K.A. Dyer, F.R. Lehman, J.A. Mohan, and K.J.K. Gandhi. 2013.  Dynamics of an unprecedented outbreak of two native moth species, Cissusa spadix and Phoberia atomaris (Lepidoptera: Noctuidae), on oak trees (Quercus spp.) in the southeastern United States.  Am. Entomol. 59: 82-94.

Coyle, D.R., D.P. Aubrey, J.C. Siry, R.R. Volfovicz-Leon, and M.D. Coleman.  2013. Optimal nitrogen application rates for three intensively-managed hardwood tree species in the southeastern USA. For. Ecol. Manage. 303: 131-142.

Coyle, D.R., M.W. Murphy, S.M. Paskewitz, J.L. Orrock, X. Lee, R.J. Murphy, M.A. McGeehin, and K.F. Raffa.  2013.  Belowground herbivory in red pine stands initiates a cascade that increases abundance of Lyme disease vectors. For. Ecol. Manage. 302: 354-362. Supplemental Data

Kaczmarek, D.J., D.R. Coyle, and M.D. Coleman. 2013. Survival and growth of a range of Populus clones in central South Carolina USA through age ten: Do early assessments reflect longer-term survival and growth trends? Biomass Bioenergy 49: 260-272.

Zalesny, R.S. Jr., D.M. Donner, D.R. Coyle, and W.L. Headlee. 2012. An approach for siting poplar energy production systems to increase productivity and associated ecosystem services. For. Ecol. Manage. 284: 45-58.

Coyle, D.R. and K.J.K. Gandhi.  2012.  The ecology and biological control potential of hymenopteran parasitoids of woodwasps (Hymenoptera:  Siricidae).  Environ. Entomol. 41:731-749. (Invited Review).

Coyle, D.R., W.J. Mattson, M.S. Jordan, and K.F. Raffa.  2012.  Variable host phenology does not pose a barrier to invasive weevils in a northern hardwood forest.  Agric. For. Entomol. 14:  276-285.

Coyle, D.R., J.A. Pfammatter, A.M. Journey, T.L. Pahs, V.J. Cervenka, and R.L. Koch.  2012.  Community composition and phenology of native Siricidae (Hymenoptera) attracted to semiochemicals in Minnesota.  Environ. Entomol. 41:  91–97.

Aubrey, D.P., D.R. Coyle, and M.D. Coleman.  2012.  Functional groups show distinct differences in nitrogen cycling during early stand development:  implications for forest management.  Plant Soil 351:  219–236.  Supplemental Data

Pfammatter, J.A., D.R. Coyle, A.M. Journey, T.L. Pahs, J.C. Luhman, V.J. Cervenka, and R.L. Koch.  2011.  Bark beetle (Coletoptera:  Curculionidae:  Scolytinae) community structure in northeastern and central Minnesota.  Great Lakes Entomol. 44:  163–176.

Orrock, J.L., G.R. Curler, B.J. Danielson, and D.R. Coyle.  2011.  Large-scale experimental landscapes reveal distinctive effects of patch geometry and connectivity on arthropod communities.  Landscape Ecol. 26: 1361-1372. Supplemental Data

Coyle, D.R., J.A. Zalesny, and R.S. Zalesny, Jr.  2011.  Irrigating poplar energy crops with landfill leachate negatively affects soil micro- and meso-fauna.  Internat. J. Phytoremed. 13:  845-858. 

Coyle, D.R., J.G. Duman, and K.F. Raffa.  2011.  Temporal and species variation in cold hardiness among invasive rhizophagous weevils (Coleoptera: Curculionidae) in a northern hardwood forest.  Ann. Entomol. Soc. Am. 104:  59–67.

Coyle, D. R., A. A. Allred, K. R. Kosola, and K. F. Raffa.  2011.  Altered GAI activity of hybrid aspen has minimal effects on the performance of a polyphagous weevil, Polydrusus sericeus.  Entomol. Exp. Appl. 138:  104–109.

Coyle, D.R., K.E. Clark, K.F. Raffa, and S.N. Johnson.  2011.  Prior host feeding experience influences ovipositional but not feeding preference in a polyphagous insect herbivore.  Entomol. Exp. Appl. 138:  137–145.

Coyle, D.R., M.S. Jordan, and K.F. Raffa.  2010.  Host plant phenology affects performance of an invasive weevil, Phyllobius oblongus (Coleoptera:  Curculionidae), in a northern hardwood forest.  Environ. Entomol. 39:  1539–1544.

Coyle, D.R., W.J. Mattson, and K.F. Raffa. 2010. Laboratory performance of two polyphagous invasive weevils on the predominant woody plant species of a northern hardwood community. Environ. Entomol. 39: 1242-1248.

Hillstrom, M.L., L.M. Vigue, D.R. Coyle, K.F. Raffa, and R.L. Lindroth. 2010. Performance of the invasive weevil Polydrusus sericeus is influenced by atmospheric CO2 and host species. Agric. For. Entomol. 12: 285-292.

Coyle, D.R., D.P. Aubrey, and C.R. Hickman. 2010. Not sure about a PhD program? Work in science on a "pre-PhD". Front. Ecol. Environ. 8: 105-106.

Coyle, D.R., D.P. Aubrey, and J. Bentz. 2010. Erythroneura lawsoni (Homoptera: Cicadellidae) abundance and feeding injury levels are influenced by foliar nutrient status in intensively managed American sycamore. Agric. For. Entomol. 12: 89-97.

Zalesny, J.A., R.S. Zalesny, D.R. Coyle, R.B. Hall, and E.O. Bauer. 2009. Clonal variation in morphology of Populus root systems following irrigation with landfill leachate or water during two years of establishment. BioEnergy Res. 2: 134-143.

Boyles, J.G., D.P. Aubrey, B.S. Cooper, J.G. Cox, D.R. Coyle, R.J. Fisher, J.D. Hoffman, and J.J. Storm. 2008. Statistical confusion among graduate students: Sickenss or symptom? J. Wildl. Manage. 72: 1869-1871.

Coyle, D.R., M.D. Coleman, and D.P. Aubrey. 2008. Above and belowground biomass accumulation, production, and distribution of sweetgum and loblolly pine grown with irrigation and fertilization. Can. J. For. Res. 38: 1335-1348.

Coyle, D.R., E.R. Hart, J.D. McMillin, L.C. Rule, and R.B. Hall. 2008. Effects of repeated cottonwood leaf beetle defoliation on Populus growth and economic value over an 8-year harvest rotation. For. Ecol. Manage. 255: 3365-3373.

Aubrey, D.P., M.D. Coleman, and D.R. Coyle. 2007. Ice damage in loblolly pine: understanding the factors that influence susceptibility. For. Sci. 53: 580-589.

Zalesny, J.A., R.S. Zalesny, D.R. Coyle, and R.B. Hall. 2007. Growth and biomass of Populus irrigated with landfill leachate. For. Ecol. Manage. 248: 143-152.

Balser, T.C., K.D. McMahon, D. Bart, D. Bronson, D.R. Coyle, N. Craig, M. Flores-Mangual, K. Forshay, S.E. Jones, A.E. Kent, and A.L. Shade. 2006. Bridging the gap between micro- and macro-scale perspectives on the role of microbial communities in global change ecology. Plant and Soil 289: 59-70.

Coyle, D.R., M.D. Coleman, J.A. Durant, and L.A. Newman. 2006. Multiple factors affect pest and pathogen damage on 31 Populus clones in South Carolina. Biomass and Bioenergy 30: 759-768.

Coyle, D.R., M.D. Coleman, J.A. Durant, and L.A. Newman. 2006. Survival and growth of 31 Populus clones in South Carolina. Biomass and Bioenergy 30: 750-758.

Coyle, D.R., D.C. Booth, and M.S. Wallace. 2005. Ambrosia beetle (Coleoptera: Scolytidae) species, flight, and attack on living eastern cottonwood trees. J. Econ. Entomol. 98: 2049-2057.

Coyle, D.R. and M.D. Coleman. 2005. Forest production responses to irrigation and fertilization are not explained by shifts in allocation. For. Ecol. Manage. 208: 137–152.

Allen, C.B., R.E. Will, R.C. McGarvey, D.R. Coyle, and M.D. Coleman. 2005. Radiation-use efficiency and gas exchange responses to water and nutrient availability in irrigated and fertilized stands of sweetgum and sycamore.Tree Physiol. 25: 191–200.

Coyle, D.R., T.E. Nebeker, E.R. Hart, and W.J. Mattson, Jr. 2005. Biology and management of insect pests in North American intensively-managed hardwood forest systems. Annu. Rev. Entomol. 50: 1–29.

Coyle, D.R. and J.W. Amrine, Jr. 2004. New collection records and host range of the cottonwood leafcurl mite, Tetra lobulifera (Keifer) (Acari: Eriophyidae), in the USA. Internat. J. Acarol. 30: 3–8.

Coyle, D.R., J.T. Nowak, and C.J. Fettig. 2003. Irrigation and fertilization effects on Nantucket pine tip moth (Lepidoptera: Tortricidae) damage levels and pupal weight in an intensively-managed pine plantation. J. Entomol. Sci. 38: 621–630.

Coyle, D.R., J.D. McMillin, R.B. Hall, and E.R. Hart. 2003. Effects of cottonwood leaf beetle (Coleoptera: Chrysomelidae) larval defoliation, clone, and season on Populus foliar phagostimulants. Environ. Entomol. 32: 452–462.

Coyle, D.R. 2002. Effects of clone, silvicultural, and miticide treatments on cottonwood leafcurl mite (Acari: Eriophyidae) damage in plantation Populus. Environ. Entomol. 31: 1000–1008.

Coyle, D.R., J.D. McMillin, R.B. Hall, and E.R. Hart. 2002. Cottonwood leaf beetle (Coleoptera: Chrysomelidae) defoliation impact on Populus growth and above-ground volume in a short-rotation woody crop plantation. Agric. For. Entomol. 4: 293–300.

Coyle, D.R., J.D. McMillin, R.B. Hall, and E.R. Hart. 2001. Cottonwood leaf beetle (Coleoptera: Chrysomelidae) larval performance on eight Populus clones. Environ. Entomol. 30: 748–756.

Coyle, D.R., J.D. McMillin, S.C. Krause, and E.R. Hart. 2000. Laboratory and field evaluations of two Bacillus thuringiensis formulations, Novodor and Raven, for control of cottonwood leaf beetle (Coleoptera: Chrysomelidae). J. Econ. Entomol. 93: 713–720.

Coyle, D.R., J.D. McMillin, and E.R. Hart. 1999. Pupal and adult parameters as potential indicators of cottonwood leaf beetle (Coleoptera: Chrysomelidae) fecundity and longevity. Great Lakes Entomol. 32: 107–113.

Coyle, D.R. and K.J. Larsen. 1998. Carrion beetles (Coleoptera: Silphidae) of northeastern Iowa: A comparison of baits for sampling. J. Iowa Acad. Sci. 105: 161–164.

Web Pages:

In collaboration with Southern Regional Extension Forestry, I run a Forest Health and Invasive Species program for the southeastern U.S.

In collaboration with Dr. Ronald Zalesny, we created a web page highlighting the recent literature pertaining to intensively-managed Populus.

In collaboration with personnel from the University of Georgia and the USDA Forest Service we created web page to disseminate information pertaining to southen pine health.

Non-Refereed and Extension Publications:

Zalesny, R.S., Jr. and D.R. Coyle. 2013. Short rotation Populus: A bibliography of North American Literature, 1989-2011. Gen. Tech. Rep. NRS-110. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 103 p.

Coleman M.D., D.R. Coyle, J. Blake, K. Britton, M. Buford, B. Campbell, J. Cox, B. Cregg, D. Daniels, M. Jacobson, K. Johnson, T. McDonald, K. McLeod, E. Nelson, D. Robison, R. Rummer, P. Sanchez, J. Stanturf, B. Stokes, C. Trettin, J. Tuskan, L. Wright, and S. Wullschleger. 2004. Production of Short Rotation Woody Crops Grown with a Range of Nutrient and Water Availability: Establishment Report and First-Year Responses. USDA-Forest Service, Southern Research Station, Asheville, NC. SRS-GTR-072. 21 p.

Coyle, D.R. and D.R. Lewis. 1999. Common Butterflies of Iowa. Iowa State University Extension Press, Pm 1795. 16 pp.

In Review/Accepted:

Avtzis, D.M., D.R. Coyle, V. Christopoulos, and A. Roques. Accepted with Revisions. Biological invasions, national borders, and the current state of non-native species in Greece and its neighboring countries. Bulletin of Insectology.

In the works:

Coyle, D.R., B.F. Barnes, K.D. Klepzig, F.H. Koch, L.A. Morris, J.T. Nowak, W.J. Otrosina, W.D. Smith, K.J.K. Gandhi. Stand management impacts pine health in the Southeast: the curious case of "pine decline". To be submitted to Forest Ecology and Management.

Denham, S.O., D.R Coyle, A.C. Oishi, B.P. Bullock, K. Heliövaara, and K.A. Novick.  In Review. Effects of simulated, micro-infestations of bark beetles on tree resin dynamics.  To be submitted to Canadian Journal of Forest Research.

Coyle, D.R., D.P. Aubrey, and M.D. Coleman. Nitrogen dynamics of four intensively-managed tree species receiving water and nutrient amendments over a full harvest rotation. To be submitted to Forest Ecology and Management.

Coyle, D.R., J.L.M. Gutknecht, and K.F. Raffa. Altered soil microbial communities as a result of an above-belowground pest and disease progression in red pine plantations. To be submitted to Soil Biology and Biochemistry.

Coyle, D.R., J.L.M. Gutknecht, T.C. Balser, and K.F. Raffa.  In Preparation.  The soil microbial community of a northern hardwood forest is altered by the abundance of rhizophagous weevil larvae.  To be submitted to Soil Biology and Biochemistry.

Spaine, P., M.M. Cram, D.R. Coyle, S.V. Lumpkin, and M.D. Coleman. Differential pathegenicity of Botryosphaeria species to intensively managed sweetgum, Liquidambar styraciflua.  To be submitted to Tree Planter's Notes.