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United States Department of Agriculture

Agricultural Research Service

Shawn Steffan

Research Entomologist


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Colonies of bumble bees (Bombus impatiens) produce fewer workers, less bee biomass, and have smaller mother queens following fungicide exposure Reprint Icon - (Peer Reviewed Journal)
Bernauer, O.M., Gaines-Day, H.R., Steffan, S.A. 2015. Colonies of bumble bees (Bombus impatiens) produce fewer workers, less bee biomass, and have smaller mother queens following fungicide exposure. Insects. 6(2):478-488.
Diet quality influences isotopic discrimination among amino acids in an aquatic vertebrate Reprint Icon - (Peer Reviewed Journal)
Chikaraishi, Y., Steffan, S.A., Takano, Y., Ohkouchi, N. 2015. Diet quality influences isotopic discrimination among amino acids in an aquatic vertebrate. Ecology and Evolution. 5(10):2048-2059.
Evaluating plant volatiles for monitoring natural enemies in apple, pear and walnut orchards - (Peer Reviewed Journal)
Jones, V.P., Horton, D.R., Mills, N.J., Unruh, T.R., Baker, C.C., Melton, T.D., Miliczky, E., Steffan, S.A., Shearer, P.W., Amarasekare, K.G. 2015. Evaluating plant volatiles for monitoring natural enemies in apple, pear and walnut orchards. Biological Control. Available: http://www.sciencedirect.com/science/article/pii/S1049964415000523.
From planning to execution to the future: An overview of a concerted effort to enhance biological control in apple, pear, and walnut orchards in the western U.S. - (Peer Reviewed Journal) - (04-Mar-15)
Toxicity of chelated iron (Fe-DTPA) in American cranberry Reprint Icon - (Peer Reviewed Journal)
Siebach, S., Covarrubias Pazaran, G., Harbut, R., Workmaster, B., Wasko Devetter, L., Steffan, S., Guedot, C., Atucha, A., Zalapa, J. 2015. Toxicity of chelated iron (Fe-DTPA) in American cranberry. Journal of Horticulture. Available: http://esciencecentral.org/journals/effect-of-integrated-nutrient-management-on-growth-yield-and-quality-of-gladiolus-gladiolus-grandifloru-l-cv-psittacinus-hybrid-2376-0354-1000128.php?aid=42769.
Development and validation of 697 novel polymorphic genomic and EST-SSR Markers in the American cranberry (Vaccinium macrocarpon Ait.) Reprint Icon - (Peer Reviewed Journal)
Schlautman, B., Fajardo, D., Bougie, T., Wiesman, E., Polashock, J., Vorsa, N., Steffan, S., Zalapa, J. 2015. Development and validation of 697 novel polymorphic genomic and EST-SSR Markers in the American cranberry (Vaccinium macrocarpon Ait.). Molecules. 20(2):2001-2013.
It is time for IsoBank Reprint Icon - (Peer Reviewed Journal)
Pauli, J.N., Steffan, S.A., Newsome, S.D. 2015. It is time for IsoBank. Bioscience. 65(3):229-230.
Trophic cascades in a cranberry marsh: Can detritus-removal improve biological control - (Abstract Only)
Van Zoeren, J., Steffan, S.A. 2015. Trophic cascades in a cranberry marsh: Can detritus-removal improve biological control [abstract]. Wisconsin Ecology Annual Spring Symposium. Paper No. 8.
Multi-species pheromone-based mating disruption: Moth birth control in cranberries - (Abstract Only)
Steffan, S.A., Chasen, E.M. 2015. Multi-species pheromone-based mating disruption: Moth birth control in cranberries [abstract]. Wisconsin State Cranberry Growers Association. Paper No. SA-9.
Carnivorous arthropods after spring flood - (Abstract Only)
Van Zoeren, J., Steffan, S.A. 2015. Carnivorous arthropods after spring flood [abstract]. Wisconsin State Cranberry Growers Association. Paper No. SA-7.
Citizen science: Plant and insect phenology with regards to degree-days - (Abstract Only)
Chasen, E.M., Steffan, S.A. 2015. Citizen science: Plant and insect phenology with regards to degree-days [abstract]. Wisconsin State Cranberry Growers Association. Paper No. SA-3.
Do fungicide applications affect bee fidelity to cranberries - (Abstract Only)
Gaines-Day, H., Bernauer, O., Steffan, S.A. 2015. Do fungicide applications affect bee fidelity to cranberries [abstract]. Wisconsin State Cranberry Growers Association. Paper No. SA-8.
Temperature-mediated development thresholds of Sparganothis sulfureana (Lepidoptera: Tortricidae) in cranberries Reprint Icon - (Peer Reviewed Journal)
Deutsch, A.E., Rodriguez-Saona, C.R., Zalapa, J.E., Steffan, S.A. 2015. Temperature-mediated development thresholds of Sparganothis sulfureana (Lepidoptera: Tortricidae) in cranberries. Environmental Entomology. 44(2):400-405.
Degree-day benchmarks for Sparganothis sulfureana (Lepidoptera: Tortricidae) development in cranberries Reprint Icon - (Peer Reviewed Journal)
Deutsch, A.E., Rodriguez-Saona, C.R, Kyryczenko-Roth, V., Sojka, J., Zalapa, J.E., Steffan, S.A. 2014. Degree-day benchmarks for Sparganothis sulfureana (Lepidoptera: Tortricidae) development in cranberries. Journal of Economic Entomology. 107(6):2130-2136.
Clonal diversity and genetic differentiation revealed by SSR markers in wild Vaccinium macrocarpon and Vaccinium oxycoccos Reprint Icon - (Peer Reviewed Journal)
Zalapa, J.E., Bougie, T.C., Bougie, T.A., Schlautman, B.J., Wiesman, E., Guzman, A., Fajardo, D.A., Steffan, S., Smith, T. 2014. Clonal diversity and genetic differentiation revealed by SSR markers in wild Vaccinium macrocarpon and Vaccinium oxycoccos. Annals of Applied Biology. 166(2):196-207.
A phenology model for Sparganothis fruitworm in Cranberries - (Abstract Only)
Steffan, S.A., Deutsch, A., Rodriguez-Saona, C., Zalapa, J.E., Kyryczenko-Roth, V. 2014. A phenology model for Sparganothis fruitworm in Cranberries. American Cranberry Growers Association.
Strong evidence of mating disruption despite heavy fruitworm pressure - (Trade Journal)
Steffan, S.A., Chasen, E.M., Zalapa, J.E. 2014. Strong evidence of mating disruption despite heavy fruitworm pressure. Cranberry Crop Management Newsletter. XXVII(6):4-8.
When and how long to flood for insect control - (Trade Journal)
Steffan, S.A., Singleton, M., Zalapa, J.E. 2014. When and how long to flood for insect control. Cranberry Crop Management Newsletter. XXVII(3):1-5.
Beneficial or not? Carnivore trophic position under the lens of amino acid isotopic analysis - (Abstract Only)
Steffan, S.A., Chikaraishi, Y., Horton, D.R., Miliczky, E., Zalapa, J.E., Jones, V., Ohkouchi, N. 2014. Beneficial or not? Carnivore trophic position under the lens of amino acid isotopic analysis [abstract]. Entomological Society of America Annual Meeting. Paper No. 1420.
Citizen science project to correlate growing degree days with cranberry phenology - (Other)
Chasen, E.M., Steffan, S.A. 2014. Citizen science project to correlate growing degree days with cranberry phenology. Wisconsin State Cranberry Growers Association. XXVII(1):2.
Creation of citizen science project to correlate growing degree days with cranberry phenology - (Other)
Chasen, E.M., Steffan, S.A. 2014. Creation of citizen science project to correlate growing degree days with cranberry phenology. Cranberry Crop Management Newsletter. XXVII(1):2.
High-resolution food webs based on nitrogen isotopic composition of amino acids Reprint Icon - (Peer Reviewed Journal)
Chikaraishi, Y., Steffan, S.A., Ogawa, N.O., Ishikawa, N.F., Sasaki, Y., Tsuchiya, M., Ohkouchi, N. 2014. High-resolution food webs based on nitrogen isotopic composition of amino acids. Ecology and Evolution. 4(12):2423-2449.
Trophic spectra under the lens of amino acid isotopic analysis - (Abstract Only)
Steffan, S.A., Chikaraishi, Y., Horton, D.R., Miliczky, E., Zalapa, J.E., Jones, V., Ohkouchi, N. 2014. Trophic spectra under the lens of amino acid isotopic analysis [abstract]. Entomological Society of America Annual Meeting North Central Branch.
Pheromone-based mating disruption in Wisconsin cranberries - (Abstract Only)
Deutsch, A., Mafra-Neto, A., Sojka, J., Dittl, T., Zalapa, J.E., Steffan, S.A. 2014. Pheromone-based mating disruption in Wisconsin cranberries [abstract]. Wisconsin State Cranberry Growers Association.
A syndrome of mutualism reinforces the lifestyle of a sloth Reprint Icon - (Peer Reviewed Journal)
Pauli, J., Mendoza, J., Steffan, S.A., Carey, C.C., Weimer, P.J., Peery, Z. 2014. A syndrome of mutualism reinforces the lifestyle of a sloth. Proceedings of the Royal Society B. 281:20133006.
The American cranberry mitochondrial genome reveals the presence of selenocysteine (tRNA-Sec and SECIS) insertion machinery in land plants Reprint Icon - (Peer Reviewed Journal)
Fajardo, D., Schlautman, B., Steffan, S.A., Polashock, J.J., Vorsa, N., Zalapa, J.E. 2014. The American cranberry mitochondrial genome reveals the presence of selenocysteine (tRNA-Sec and SECIS) insertion machinery in land plants. Gene. 536(2):336-343.
Susceptibility of cranberries to Drosophila suzukii (Diptera: Drosophilidae) Reprint Icon - (Peer Reviewed Journal)
Steffan, S.A., Lee, J.C., Singleton, M., Vilaire, A., Walsh, D., Lavine, L., Patten, K. 2013. Susceptibility of cranberries to Drosophila suzukii (Diptera: Drosophilidae). Journal of Economic Entomology. 106(6):2424-2427.
Trophic hierarchies illuminated via amino acid isotopic analysis Reprint Icon - (Peer Reviewed Journal)
Steffan, S.A., Chikaraishi, Y., Horton, D.R., Ohkouchi, N., Singleton, M., Hogg, D.B., Miliczky, E., Jones, V. 2013. Trophic hierarchies illuminated via amino acid isotopic analysis. PLoS One. 8(9):e76152. Available: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0076152.
Amino acid isotopic analysis in agricultural systems - (Abstract Only)
Steffan, S.A., Chikaraishi, Y. 2013. Amino acid isotopic analysis in agricultural systems [abstract]. National Meeting of Entomological Society Of America. Paper No. 1435.
Multi-species mating disruption in Wisconsin cranberries - (Abstract Only)
Deutsch, A., Sojka, J., Dittl, T., Mafra-Neto, A., Zalapa, J.E., Steffan, S.A. 2013. Multi-species mating disruption in Wisconsin cranberries [abstract]. National Meeting of Entomological Society Of America. Paper No. 0711.
Sparganothis fruitworm biology and phenology - (Abstract Only)
Steffan, S.A., Deutsch, A., Kyryczenko-Roth, V., Rodriguez-Saona, C., Zalapa, J.E. 2013. Sparganothis fruitworm biology and phenology [abstract]. North American Cranberry Research and Extension Workers Annual Meeting. p. 2.
Stage-specific development of Sparganothis sulfureana (Lepidoptera: Tortricidae) - (Abstract Only)
Deutsch, A., Kyryczenko-Roth, V., Rodriguez-Saona, C., Zalapa, J.E., Steffan, S.A. 2013. Stage-specific development of Sparganothis sulfureana (Lepidoptera: Tortricidae) [abstract]. North American Cranberry Research and Extension Workers Annual Meeting. p. 1.
Multi-species mating disruption in cranberries - (Abstract Only)
Deutsch, A., Sojka, J., Dittl, T., Mafra-Neto, A., Zalapa, J.E., Steffan, S.A. 2013. Multi-species mating disruption in cranberries [abstract]. North American Cranberry Research and Extension Workers Annual Meeting. p. 2.
Trophic hierarchies revealed via amino acid isotopic analysis - (Abstract Only)
Steffan, S.A., Chikaraishi, Y., Horton, D.R., Ohkouchi, N. 2013. Trophic hierarchies revealed via amino acid isotopic analysis [abstract]. Ecological Society of America (ESA). Paper No. COS 59-2.
Grazing food web view from compound-specific stable isotope analysis of amino acids - (Abstract Only)
Chikaraishi, Y., Steffan, S.A., Ohkouchi, N. 2013. Grazing food web view from compound-specific stable isotope analysis of amino acids [abstract]. Ecological Society of America (ESA). Paper No. COS 59-3.
Spotted Wing Drosophila, Sparganothis phenology and a new look at the BugFloods - (Proceedings)
Steffan, S.A., Lee, J.C., Deutsch, A., Singleton, M., Rodriguez-Saona, C., Zalapa, J.E. 2013. Spotted Wing Drosophila, Sparganothis phenology and a new look at the BugFloods. Wisconsin Cranberry School. 21:1-6.
Sparganothis fruitworm phenology - (Abstract Only)
Steffan, S.A., Rodriguez-Saona, C., Deutsch, A., Kyryczenko-Roth, V. 2013. Sparganothis fruitworm phenology [abstract]. American Cranberry Growers Association. Paper No. 11.
Targeting red-headed flea beetle larvae - (Proceedings)
Bosak, E.J., Perry, J., Sojka, J., Dittl, T., Steffan, S.A. 2013. Targeting red-headed flea beetle larvae. Wisconsin Cranberry School. 21:7-13.
The volatilization of SPLAT® for use in pheromone mating disruption of cranberry pests - (Abstract Only)
Volk, K., Deutsch, A., Steffan, S.A. 2013. The volatilization of SPLAT® for use in pheromone mating disruption of cranberry pests [abstract]. Introductory Biology 152 Undergraduate Research.
Pheromone-based mating disruption to control the historical top three insect pests of Wisconsin cranberries - (Proceedings)
Deutsch, A., Sojka, J., Dittl, T., Mafra-Neto, A., Steffan, S.A. 2013. Pheromone mating disruption. Wisconsin Cranberry School. 21:14-16.
Cranberries and Spotted Wing Drosophila (SWD) in Wisconsin - (Other)
Steffan, S.A., Lee, J.C., Lavine, L., Walsh, D., Metzger, C., Zalapa, J.E., Guedot, C., Pellitteri, P. 2012. Cranberries and Spotted Wing Drosophila (SWD) in Wisconsin. Wisconsin State Cranberry Growers Association. XXIII(11):13.
Complete plastid genome sequence of Vaccinium macrocarpon: structure, gene content and rearrangements revealed by next generation sequencing Reprint Icon - (Peer Reviewed Journal)
Fajardo, D., Senalik, D.A., Ames, M., Zhu, H., Steffan, S.A., Harbut, R., Polashock, J.J., Vorsa, N., Gillespie, E., Kron, K., Zalapa, J.E. 2013. Complete plastid genome sequence of Vaccinium macrocarpon: structure, gene content and rearrangements revealed by next generation sequencing. Tree Genetics and Genomes. 9(2):489-498.
Flooding as “spring cleaning” for insect pests - (Proceedings)
Steffan, S.A., Singleton, M., Sojka, J., Zalapa, J.E., Dittl, T. 2012. Flooding as “spring cleaning” for insect pests. Wisconsin State Cranberry Growers Association. p. 32-34.
The record-breaking 2012 spring: Why degree-days were critical in assessing insect and plant development - (Proceedings)
Steffan, S.A., Singleton, M., Deutsch, A., Bosak, L., Zalapa, J.E. 2012. The record-breaking 2012 spring: Why degree-days were critical in assessing insect and plant development. Wisconsin State Cranberry Growers Association. p. 29-31.
Removal of arthropods in the spring “trash floods” - (Other)
Steffan, S.A., Singleton, M., Sojka, J., Zalapa, J.E. 2012. Removal of arthropods in the spring “trash floods”. Wisconsin State Cranberry Growers Association. XXV(7):3-4.
The warm winter and spring of 2012: Why degree-days were critical in measuring insect and plant development - (Other)
Steffan, S.A., Singleton, M., Deutsch, A., Bosak, L., Zalapa, J.E. 2012. The warm winter and spring of 2012: Why degree-days were critical in measuring insect and plant development. Wisconsin State Cranberry Growers Association. XXV(7):1-2.
Discrimination of American cranberry cultivars and assessment of clonal heterogeneity using microsatellite markers - (Peer Reviewed Journal)
Fajardo, D., Morales, J., Zhu, H., Steffan, S.A., Harbut, R., Bassil, N.V., Hummer, K.E., Polashock, J.J., Vorsa, N., Zalapa, J.E. 2012. Discrimination of American cranberry cultivars and assessment of clonal heterogeneity using microsatellite markers. Plant Molecular Biology Reporter. 31(2):264-271.
Ongoing research and insecticide trials for cranberry pests - (Abstract Only)
Rodriguez-Saona, C., Steffan, S.A., Kyryczenko-Rothvera, V., Holdcraft, R. 2012. Ongoing research and insecticide trials for cranberry pests [abstract]. American Cranberry Growers Assn 2012 Summer Field Day. Paper No. 19.
Niche engineering reveals complementary resource use - (Peer Reviewed Journal)
Gable, J., Crowder, D., Northfield, T., Steffan, S.A., Snyder, W. 2012. Niche engineering reveals complementary resource use. Ecology. 93(9):1994-2000.
Niche engineering reveals complementary resource use - (Abstract Only)
Gable, J., Crowder, D., Northfield, T., Steffan, S.A., Snyder, W. 2012. Niche engineering reveals complementary resource use [abstract]. Ecological Society of America (ESA). Paper No. COS166.
Rapid reconstruction and annotation of vaccinium macrocarpon organellar genomes - (Abstract Only)
Steffan, S.A., Senalik, D.A., Polashock, J.J., Vorsa, N., Fajardo, D., Harbut, R., Zalapa, J.E. 2012. Rapid reconstruction and annotation of vaccinium macrocarpon organellar genomes [abstract]. Botany 2012 - The Next Generation. Paper. No. 1043.
Bottle biology: Making cranberry cutting tubbe necklaces - (Abstract Only)
Zalapa, J.E., Gustin, E.S., Steffan, S.A., Harbut, R., Bryan, T., Fajardo, D., Williams, P., Trumble, H. 2012. Bottle biology: Making cranberry cutting tubbe necklaces [abstract]. Botany 2012 - The Next Generation. Paper No. 1059.
Use of plant volatiles to reconcile biological and chemical controls - (Abstract Only)
Steffan, S.A. 2012. Use of plant volatiles to reconcile biological and chemical controls [abstract]. Wisconsin Fresh Fruit & Vegetable Conference.
Early-season flooding for insect pest control - (Proceedings)
Steffan, S.A., Singleton, M., Sojka, J., Zalapa, J.E., Harbut, R. 2012. Early-season flooding for insect pest control. Wisconsin Cranberry School 2012 Proceedings. 20:24-28.
In silico analysis of 454 data yields the complete American cranberry (Vaccinium macrocarpon Ait.) plastid genome - (Abstract Only)
Zalapa, J.E., Steffan, S.A., Simon, P.W., Senalik, D.A., Polashock, J.J., Vorsa, N., Fajardo, D., Harbut, R., Zhu, H., Mccown, B., Zeldin, E. 2012. In silico analysis of 454 data yields the complete American cranberry (Vaccinium macrocarpon Ait.) plastid genome [abstract]. Plant and Animal Genome Conference. Paper No. P0047.
Trophic spectra reveal the community structure of a terrestrial system - (Abstract Only)
Steffan, S.A., Chikaraishi, Y., Bosak, E., Horton, D.R., Ohokouchi, N., Jones, V. 2012. Trophic spectra reveal the community structure of a terrestrial system [abstract]. 2012 Ocean Sciences Meeting. Paper No. AO323.
Progress towards the complete American cranberry (Vaccinium macrocarpon Ait.) plastid genome - (Abstract Only)
Zalapa, J.E., Steffan, S.A., Simon, P.W., Senalik, D.A., Polashock, J.J., Vorsa, N., Diego, F., Harbut, R., Zhu, H. 2011. Progress towards the complete American cranberry (Vaccinium macrocarpon Ait.) plastid genome [abstract]. Plant Sciences Symposium.
Using next generation sequencing approaches for the isolation of simple sequence repeats (SSF) in the plant sciences - (Peer Reviewed Journal)
Zalapa, J.E., Cuevas, H.E., Steffan, S.A., Simon, P.W., Senalik, D.A., Zhu, H., Mccown, B., Zeldin, E., Harbut, R. 2012. Using next generation sequencing approaches for the isolation of simple sequence repeats (SSR) in the plant sciences. American Journal of Botany. 99(2):193-208.
Re-visiting spring flooding as an IPM approach in Wisconsin cranberries - (Abstract Only)
Steffan, S.A., Zalapa, J.E., Singleton, M., Harbut, R. 2011. Re-visiting spring flooding as an IPM approach in Wisconsin cranberries [abstract]. North American Cranberry Research and Extension Workers Annual Meeting. p. 18.
Development of educational tools to connect public audiences with cranberry researchers and growers - (Abstract Only)
Zalapa, J.E., Steffan, S.A., Harbut, R., Fredette, N. 2011. Development of educational tools to connect public audiences with cranberry researchers and growers [abstract]. North American Cranberry Research and Extension Workers Annual Meeting. Paper No. 8.
Measuring genetic diversity and purity of cranberry clonal cultivars using microsatellite markers - (Abstract Only)
Zalapa, J.E., Steffan, S.A., Hummer, K.E., Bassil, N.V., Moreno, J., Zhu, H., Mccown, B., Zeldin, E., Harbut, R. 2011. Measuring genetic diversity and purity of cranberry clonal cultivars using microsatellite markers [abstract]. North American Cranberry Research and Extension Workers Annual Meeting. Paper No. 5.
Last Modified: 3/19/2013
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