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Dr. Thomas M. Chappell

Chappell, Dr. Thomas M.
Dr. Thomas M. Chappell
Assistant Professor
202E L.F Peterson
Undergraduate Education
B.S. (magna cum laude), Biology, University of Michigan, 2004
B.M. (summa cum laude), Performance, University of Michigan, 2004
Graduate Education
Ph.D., Biology, Duke University, 2010
Post-doctoral, Entomology, North Carolina State University

Research Emphasis

Plant pathosystems are dynamic, and timely understanding of the mechanisms and causes of relevant dynamics greatly benefits disease management. The Chappell lab uses empirical approaches to develop models of plant pathosystems and works to implement these models as tools to support risk, vector, and disease management in agroecosystems. Climate, synoptic- to microscale meteorology, landscape configuration, and vector dynamics are of principal interest, and we work to understand the relationships of drivers such as these to their respective epidemiological outcomes. Methodologically, a variety of experimental and observational approaches are used to develop models, and a variety of environmental, organismal, and molecular approaches are used to generate data.

Examples of current modeling efforts aimed at providing useful information to disease managers include 1) study of soil characteristics’ interaction with plants and weather, especially precipitation, to understand dynamics of soil-borne fungal disease; 2) study of vector phenology and behavior, driven by the interaction of arthropod biology with environment, to understand dynamics of vector-borne viral and bacterial disease; and 3) epidemiology of disease systems experiencing pathogen or vector evolution of resistance to existing management technologies, such as fungicides and pesticides. We study plant disease at the system level, with the ultimate goal of improving pathosystem management.


Chappell TM and Kennedy GG (in press) Estimating the effectiveness of imidacloprid when used to suppress transmission of Tomato spotted wilt orthotospovirus in commercial agriculture. J.Econ. Entomol. http://dx.doi.org/10.1093/jee/toy164

Huseth AS, Chappell TM, Chitturi A, Jacobson AL, Kennedy GG (2018) Insecticide Resistance Signals Negative Consequences of Widespread Neonicotinoid Use on Multiple Field Crops in the U.S. Cotton Belt. Environ. Sci. Technol. 52(4): 2314–2322. http://dx.doi.org/10.1021/acs.est.7b06015

Smeda JR, Schilmiller AL, Anderson T, Ben-Mahmoud S, Ullman DE, Chappell TM, Kessler A, Mutschler MA (2018) Combination of Acylglucose QTL reveals additive and epistatic genetic interactions and impacts insect oviposition and virus infection. Mol. Breeding, 38: 3. http://dx.doi.org/10.1007/s11032-017-0756-z

Knowles LL, Chappell TM, Marquez EJ, Cohn TJ (2016) Tests of the Role of Sexual Selection in Genitalic Divergence with Multiple Hybrid Clines. J. Orthoptera Res., 25(2):75-82. http://dx.doi.org/10.1665/034.025.0206

Chappell TM and Rausher MD (2016) Host range evolution in Coleosporium ipomoeae, a plant pathogen with multiple hosts. Proc. Nat. Acad. Sci., 113(19): 5346-5351. http://dx.doi.org/10.1073/pnas.1522997113

Leckie BM, D’Ambrosio DA, Chappell TM, Halitschke R, De Jong DM, Kessler A, Kennedy GG, Mutschler MA (2016) Differential and synergistic functionality of acylsugars in suppressing oviposition by insect herbivores PLOS ONE, 11(4). http://dx.doi.org/10.1371/journal.pone.0153345

Huseth AS, Chappell TM, Langdon K, Morsello SC, Martin S, Greene JK, Herbert A, Jacobson AL, Reay-Jones FPF, Reed T, Reisig DD, Roberts PM, Smith R, Kennedy GG (2016) Frankliniella fusca resistance to neonicotinoid insecticides: an emerging challenge for cotton pest management in the Eastern United States. Pest Manag. Sci., 72: 1934-1945. http://dx.doi.org/10.1002/ps.4232

Kennedy SR, Schultz EM, Chappell TM, Kohrn B, Knowels GM, Herr AJ (2015) Volatility of mutator phenotypes at single cell resolution. PLOS Genet., 11(4). http://dx.doi.org/10.1371/journal.pgen.1005151

Chappell TM, Kennedy GG, Walgenbach JF (2014) Predicting codling moth (Cydia pomonella) phenology in North Carolina based on temperature and improved generation turnover estimates. Pest Manag. Sci., 71: 1425-1432.  http://dx.doi.org/10.1002/ps.3947

Chappell TM, Beaudoin AL, Kennedy GG (2013) Interacting Virus Abundance and Transmission Intensity Underlie Tomato Spotted Wilt Virus Incidence: An Example Weather-Based Model for Cultivated Tobacco. PLOS ONE, 8(8). http://dx.doi.org/10.1371/journal.pone.0073321

Chappell TM and Rausher MD (2011) Genetics of resistance to the rust fungus Coleosporium ipomoeae in three species of morning glory (Ipomoea). PLOS ONE, 6(12). http://dx.doi.org/10.1371/journal.pone.0028875