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Ada Szczepaniec

Szczepaniec, Ada
Ada Szczepaniec
Assistant Professor - Amarillo
Undergraduate Education
B.S. Cell Molecular Biology and Genetics - 2003
Graduate Education
Ph.D. Entomology, University of Maryland - 2009

Program description:

My research is focused on the mechanisms that drive the outcomes of arthropod-plant interactions and contribute to pest outbreaks in managed landscapes. In particular, I study molecular mechanisms underlying insecticide-mediated changes in target and non-target organisms (i.e., plants and arthropods), mechanisms of plant-herbivore/pathogen interactions and host plant resistance, biology and ecology of insect herbivores and their natural enemies, and sustainable management of existing and invasive pests in agroecosystems. I integrate molecular, laboratory, and field experiments to address these research foci.

The goal of my work is to improve our knowledge of species interactions at a cellular, organismal, and population-level and advance our ability to predict arthropod outbreaks and mitigate their impact through enhanced host plant resilience, more judicious use of insecticides, and decreased environmental and economic costs of crop production. The entirety of my work has been done in the context of applied entomology, and by the virtue of its applied nature my research has facilitated frequent interactions with Extension faculty and staff, commodity groups, and stakeholders.


Guest lectures in Field Crops Entomology (ENTO 402) and Insect Biotechnology (ENTO 428).

Publications and Scholarly Work (*Graduate student co-author; **Undergraduate student co-author; §Postdoctoral associate):

Nalam, V.J., J. Han, P. Nachappa, and A. Szczepaniec. Drought stress and pathogen infection alter
feeding behavior of a phytopathogen vector. Entomologia Experimentalis et Applicata, in review

Szczepaniec, A., and C.M. Rush. Outbreaks of black blister beetle (Coleoptera: Meloidae) in the Texas Panhandle. American Entomologist, in review

Neupane*, S.B., D. Kerns, and A. Szczepaniec. The impact of sorghum ontology and resistance on life history traits of sugarcane aphids, Melanaphis sacchari (Hemiptera: Aphididae). Journal of Economic Entomology, in review

Koralewski, T.E., H.H. Wang, W.E. Grant, M.J. Brewer, N.C. Elliot, J.K. Westbrook,
A. Szczepaniec, A. Knutson, K.L. Giles, and J.P. Michaud. Integrating models of atmospheric
dispersion and crop-pest dynamics: Linking detection of local aphid infestations to forecast of
region-wide invasion of cereal crops. Annals of Entomological Society of America, Accepted – doi: 10.1093/aesa/saz047

Szczepaniec, A., and D. Finke. 2019. Plant-vector-pathogen interactions in the context of drought stress. Frontiers of Ecology and Evolution doi: 10.3389/fevo.2019.00262.

Wulff§, J.A., M. Kiani§, K. Regan*, M.D. Eubanks, and A. Szczepaniec. 2019. Neonicotinoid insecticides alter the transcriptome of soybeans and decrease plant resistance. International Journal of Molecular Science 20 (3): 783-800.

Szczepaniec, A., K. Varela**, M. Kiani§, L. Paetzold, and C. Rush. 2019. Incidence of neonicotinoid resistance in Bactericera cockerelli across the Southwest U.S. Crop Protection 116: 188-195

Hewlett*, J., A. Szczepaniec, and M. D. Eubanks. 2019. The effects of sugarcane aphid density in sorghum on predation by lady beetles and lacewings. Biological Control 129: 171-177

Kiani§, M., and A. Szczepaniec. 2018. Effects of sugarcane aphid herbivory on transcriptional responses of resistant and susceptible sorghum. BMC Genomics 19: 774

Szczepaniec, A. 2018. Assessment of a density-based action threshold for suppression of sugarcane aphids, Melanaphis sacchari (Hemiptera: Aphididae) in the southern High Plains. Journal of Economic Entomology 111(5): 2201-2207.

Szczepaniec, A. 2018. Interactive effects of crop variety, insecticide seed treatments, and planting date on population dynamics of sugarcane aphid (Melanaphis sacchari) and their predators in late-colonized sorghum. Crop Protection 109: 72-79.

Regan*, K., D. Ordosch*, K.D. Glover, K.J. Tilmon, and A. Szczepaniec. 2017. Effects of a pyrethroid and two neonicotinoid insecticides on population dynamics of key pests of soybean and abundance of their natural enemies. Crop Protection 98: 24-32

Ordosch*, D., R. Narem, and A. Szczepaniec. 2016. Effectiveness of Bt maize against corn rootworm and species composition of Diabrotica (Coleoptera: Chrysomelidae) in South Dakota 10 years following the introduction of transgenic corn. Journal of Agricultural and Urban Entomology, 32(1): 59-70.

Szczepaniec, A., and N. Spomer. 2016. Effects of several insecticides on suppression of aster leafhoppers (Macrosteles quadrilineatus, Hemiptera: Cicadellidae) in spring wheat and their impact on yield of wheat. Journal of Agricultural and Urban Entomology 32(1): 25-34

Byamukama, E., A. Szczepaniec, C. Strunk, R. Fanning, D. Deneke, and P. Johnson. 2016. Assessing integrated pest management implementation and knowledge gaps in South Dakota. Journal of Extension 54(1): 1-8

Szczepaniec, A., K.D. Glover, and W. Berzonsky. 2015. Impact of stem solidity of winter and spring wheat on severity of wheat stem sawfly (Hymenoptera: Cephidae) infestations and yield and quality of grain. Journal of Economic Entomology 108(5): 2316-23

Szczepaniec, A., B.B. Raupp**, and M.J. Raupp. 2013. Effects of dinotefuran and imidacloprid on target and non-target arthropods on American elm. Arboriculture and Urban Forestry 39(5): 231-235

Szczepaniec, A., M.J. Raupp, R.D. Parker, D. Kerns, and M.D. Eubanks. 2013. Neonicotinoid insecticides alter induced defenses and increase susceptibility to spider mites in distantly related crop plants. PLoS ONE doi: 10.1371/journal.pone.0062620

Szczepaniec, A., S.E. Widney**, J.S. Bernal and M.D. Eubanks. 2013. Higher expression of induced defenses in teosintes (Zea spp.) is correlated with greater resistance to fall armyworm, Spodoptera frugiperda. Entomologia Experimentalis & Applicata 146(2): 242-251

Szczepaniec, A., and M.J. Raupp. 2012. Direct and indirect effects of imidacloprid on fecundity and abundance of Eurytetranychus buxi (Acari: Tetranychidae) on boxwood. Experimental and Applied Acarology 59(3): 307-318

Szczepaniec, A. and M.J. Raupp. 2012. Effects of imidacloprid on spider mite (Acari: Tetranychidae) abundance and associated injury to boxwoods. Journal of Arboriculture and Urban Forestry; 38(2): 37-39

Szczepaniec, A., S.F. Creary, K.L. Laskowski, J.P. Nyrop and M.J. Raupp. 2011. Neonicotinoid insecticide imidacloprid causes outbreaks of spider mites on elm trees in urban landscapes. PLoS ONE 6(5): e20018. doi:10.1371/journal.pone.0020018

Barbosa P., J. Hines, I. Kaplan, H. Martinson, A. Szczepaniec, Z. Szendrei. 2009. Associational resistance and susceptibility: having right or wrong neighbors. Annual Review of Ecology, Evolution & Systematics: 40:1-20

Szczepaniec, A., and M.J. Raupp. 2007. Residual Toxicity of Imidacloprid to Hawthorn Lace Bug, Corythuca cydoniae, Feeding on Cotoneasters in Landscapes and Containers. Journal of Environmental Horticulture; 25: 43-46

Raupp, M. J., A. Szczepaniec, and A. Buckelew Cumming. Prophylactic pesticide applications and low species diversity: Do they create pest outbreaks in the urban forest? Proceedings of the 2007 USDA Interagency Research Forum – GTR-NRS-P-28

Raupp, M.J., R.E. Webb, A. Szczepaniec, D. Booth, and R. Ahern. 2004. Incidence, Abundance, and Severity of Mites on Hemlocks Following Applications of Imidacloprid. Journal of Arboriculture; 30(2): 108-113