Antonio (Toni) DiTommaso

Primary areas of scholarship focus on:

• Effects of the environment on weed species. Evaluation of the effects of biotic (e.g. plant competition; selective disease and insect predation) and abiotic factors (e.g. light, fertility, salinity) on the seed biology, growth and reproduction of important agricultural weeds (velvetleaf, pigweeds, common ragweed) and introduced invasive plant species (e.g. swallow-wort, mugwort) of natural communities in the Northeastern United States.
• Effects of weeds on their environment. Examination of the direct and indirect impact of weeds in their habitat. Includes research on the effect of the invasive alien vine pale swallow-wort (Vincetoxicum rossicum) [Apocynaceae] on monarch butterfly populations, arbuscular mycorrhizal fungal (AMF) populations, and native plant species.
• Manipulation of the environment to suppress weeds. Research aimed at modifying the biotic and/or abiotic environment of troublesome weeds in both cropland and natural systems to improve control. These tactics can be used either alone or as part of an integrated management strategy. Manipulation of the biotic environment is primarily achieved through the use of selective biological control agents such as fungal pathogens and insects while abiotic manipulations focus largely on soil fertility management.

Selected Publications

View publications on: ResearchGate | Google Scholar.

Journal Publications

• Kochendoerfer, N., A.S. Westbrook, C.E. McMillan, P.A. Lapierre, M.A. Zaman, S.H. Morris, A. DiTommaso, and S.M. Grodsky (2025) Co-location of sheep grazing and solar energy production yields agrotechnological synergies. Agricultural Systems 229 (2025) 104403. https://doi.org/10.1016/j.agsy.2025.104403
• Stup, R.S., A.S. Westbrook, and A. DiTommaso (2025) Friend or foe? Conservation and management of common milkweed (Asclepias syriaca). Weed Technology 39(e85), 1-9. https://doi.org/10.1017/wet.2025.10037
• Sturchio, M.A., D.F. Russell, J. Schmidt, C. Marschner, A. DiTommaso, J. Kim, and S.M. Grodsky (2025) Environmental controls of suppressed fall crop productivity in an agrivoltaics solar array. Environmental Research: Food Systems 2(2025) 035004 https://doi.org/10.1088/2976-601X/adf075
• Wolff, A.C. and A. DiTommaso (2025) To know diverse manner of weeds: the development of weed identification manuals in early modern England and their influence on North American guides. Weed Technology https://doi.org/10.1017/wet.2025.10033
• Xu, Q., C. Ozaslan, A.S. Westbrook, S. Kezar, and A. DiTommaso (2025) Effects of soil moisture on competition between a central New York State Johnsongrass (Sorghum halepense) biotype and corn. Weed Science 73(e80), 1-10. https://doi.org/10.1017/wsc.2025.10055
• Yang, S., C. Chen, Y. Yang, L. Teng, J. Liu, W. Gui, W. Zhou, A.S. Westbrook, and A. DiTommaso (2025) Differential responses of weeds and rice to shading stress from oilseed rape straw mulch. Crop Protection 189 (2025) 107038 https://doi.org/10.1016/j.cropro.2024.107038
• Gannett, M., A. DiTommaso, J.P. Sparks, and J. Kao-Kniffin (2024) Microbial nitrogen immobilization as a tool to manage weeds in agroecosystems. Agriculture, Ecosystems & Environment 366 (2024) 108904.  https://doi.org/10.1016/j.agee.2024.108904
• Gannett, M.A., A. DiTommaso, Y. Son, J.P. Sparks, M.C. Reid, and J. Kao-Kniffin (2024) Manipulating soil resource availability to alter microbial communities for weed management in agroecosystems. Soil Biology and Biochemistry. 196 (2024) 109492. https://doi.org/10.1016/j.soilbio.2024.109492
• Gannett, M.A., A. DiTommaso, J.P. Sparks, and J. Kao-Kniffin (2024) Microbial nitrogen immobilization reduces competitive advantage of nitrophilous plants with soybean. Plant and Soil. https://doi.org/10.1007/s11104-024-06830-4
• Gannett, M.A., A.L. Butler-Jones, A. DiTommaso, J.P. Sparks, and J. Kao-Kniffin (2024) Soil C:N impacts on soil biological health and consequences on weed control in soybean and corn systems. Weed Science 72(4):402-421. https://doi.org/10.1017/wsc.2024.17
• Pratt, M.K., A.S. Westbrook, and A. DiTommaso (2024) Reproductive strategy, management, and medicinal uses of field horsetail (Equisetum arvense). Weed Technology. In Press.
• Westbrook, A.S., R.S. Stup, S.H. Morris, T.A. Ugine, and A. DiTommaso (2024) Establishing flower strips near agricultural fields with minimal weed management. Agriculture, Ecosystems and Environment. https://doi.org/10.1016/j.agee.2024.109157
• Westbrook, A.S., S. H. Morris, R.S. Stup, R.H. Xia, R.E. Coffey, and A. DiTommaso (2024) Annual flower strips increase biodiversity even if planting is delayed. Annals of Applied Biology 185:81–90. https://doi.org/10.1111/aab.12921
• Westbrook, A.S., N-R. Wilcox, R.S. Stup, N. Djuric, S. Xu, R. Coffey, C. Özaslan, R. Xia, S. Urmaza, M. Sher, and A. DiTommaso (2024) What we still don’t know about weed diversity: A scoping review. Weed Research. In Press. https://doi.org/10.1111/wre.12662
• Stup, R.S., A.S. Westbrook, and A. DiTommaso (2024) Impact of burial depth and root segment length on vegetative propagation of common milkweed (Asclepias syriaca). Weed Science. In Press. DOI: 10.1017/wsc.2024.37
• Marschner, C.A., I. Colucci, R.S. Stup, A.S. Westbrook, C. A.C.G. Brunharo, A. DiTommaso, and M. Mesgaran (2024) Modeling weed emergence times to optimize management: a systematic review. Weed Science 72(4):313-329. https://doi.org/10.1017/wsc.2024.25
• Allen, J., U. Menalled, G. Adeux, C. Pelzer, S. Wayman, A. Jernigan, S. Cordeau, A. DiTommaso, and M.R. Ryan (2024) Fertility and tillage intensity affect weed community diversity and functional structure in long-term organic systems. Ecological Applications 34(7) e3029. https://doi.org/10.1002/eap.3029
• Ozaslan, C., S. Gürsoy, and A. DiTommaso (2024) Band herbicide application combined with inter-row cultivation as a sustainable weed management strategy for reducing herbicide use: A meta-analysis. Crop Protection 175 (2024) 106474 https://doi.org/10.1016/j.cropro.2023.106474
• Shen, H., S. Dong, A. DiTommaso, A.S. Westbrook, S. Li, H. Zheng, Y. Zhi, H. Zuo, Q. Wang, and J. Liu (2024) Physiological factors contribute to increased competitiveness of grass relative to sedge, forb and legume species under different N application levels. Science of the Total Environment 906(2024) 167466 https://doi.org/10.1016/j.scitotenv.2023.167466
• Menalled, U.D., K.A. Bybee-Finley, R.G. Smith, A. DiTommaso, H.M. Darby, S.J. Pethybridge, and M.R. Ryan (2024) Legacy effects of crop diversity on weed-crop competition in maize production. NPJ Sustainable Agriculture 2:28 https://doi.org/10.1038/s44264-024-00036-y
• Menalled, U.D., C.J. Pelzer, A. DiTommaso, and M.R. Ryan (2023) Effect of multi-tactic weed management on weed suppression and yield in the establishment year of intermediate wheatgrass. Agrosystems, Geosciences & Environment. 2023;6:e20426. https://doi.org/10.1002/agg2.20426
• Shoenberger, E.D., J.M. Jungers, E.P. Law, C.L. Keene, A. DiTommaso, C.C. Sheaffer, D.L. Wyse, V.D. Picasso, and D.E. Stoltenberg (2023) Synthetic auxin herbicides do not injure intermediate wheatgrass or affect grain yield. Weed Technology 37(5): 560–568. doi: 10.1017/wet.2023.71
• Menalled, U.D., R.G. Smith, S. Cordeau, A. DiTommaso, S.J. Pethybridge, and M.R. Ryan (2023) Phylogenetic relatedness can influence cover crop‑based weed suppression. Scientific Reports (2023) 13:17323 | https://doi.org/10.1038/s41598-023-43987-x
• Westbrook, A. S., and A. DiTommaso (2023) Hybridization in agricultural weeds: A review from ecological, evolutionary, and management perspectives. American Journal of Botany 110(12): e16258. https://doi.org/10.1002/ajb2.16258
• Fletcher, R.A., D.Z. Atwater, D.C. Haak, M.V. Bagavathiannan, A. DiTommaso, E. Lehnhoff, A.H. Paterson, S. Auckland, P. Govindasamy, C. Lemke, E. Morris, L. Rainville, and J.N. Barney (2023) Adaptive constraints at the range edge of a widespread and expanding invasive plant. AoBPlants 15:1-12 https://doi.org/10.1093/aobpla/plad070
• Rowland, A.V., U.D. Menalled, C.J. Pelzer, L.M. Sosnoskie, A. DiTommaso, and M.R. Ryan (2023) High seeding rates, inter-row mowing, and electrocution for weed management in organic no-till soybean. Weed Science. 71(5):478-492 DOI: https://doi.org/10.1017/wsc.2023.45
• Esposito, M., A.S. Westbrook, A. Maggio, V. Cirillo, and A. DiTommaso (2023) Neutral weed communities: the intersection between, crop productivity, biodiversity, and weed ecosystem services. Weed Science 71(4):301-311. DOI: https://doi.org/10.1017/wsc.2023.27
• Dandeniya, W.S., J.E. Thies, and A. DiTommaso (2023) Does subjecting plants to water stress enhance biological nitrification inhibition potential of rice? Plant and Soil. 490(1-2):157-173. https://doi.org/10.1007/s11104-023-06064-w
• Yang, S., J. Liu, R. Liu, R. G. Zhou, C. Chen, W. Zhou, B. Ali, W. Gui, J. Zhu, and A. DiTommaso (2023) Competitiveness of bensulfuron-methyl-susceptible and -resistant biotypes of Ammannia auriculata Willd. in direct-seeded rice. Agronomy 2023, 13, 1152. https://doi.org/10.3390/ agronomy13041152
• Westbrook, A.S., L.R. Milbrath, J. Weinberg, and DiTommaso, A (2023) Biology of Invasive Plants. 3. Vincetoxicum nigrum (L.) Moench and V. rossicum (Kleopow) Barbarich. Invasive Plant Science and Management 16(1):3-26. DOI: https://doi.org/10.1017/inp.2023.7
• Westbrook, A.S., M. Amirkhani, A.G. Taylor, M.T. Loos, J.E. Losey, and DiTommaso, A (2023) Multi-Seed Zea Pellets (MSZP) for increasing agroecosystem biodiversity. Weed Science 71(2):160-171. DOI: https://doi.org/10.1017/wsc.2023.5
• Kordbacheh, F., C.L. Mohler, A. DiTommaso, A.G. Taylor, A.S. Westbrook, H. Rahimian-Mashhadi, and H.M. Alizadeh (2023) Optimizing cutting method and timing for the control of Abutilon theophrasti seed production. Weed Research 63(1):34-44. https://onlinelibrary.wiley.com/doi/10.1111/wre.12560
• Averill, K.M., A.S. Westbrook, L. Pineda-Bermudez, R.P. O’Briant, A. DiTommaso, and M.R. Ryan. 2022. Effects of Tertill® weeding robot on weed abundance and diversity. Agronomy 2022, 12, 1754. https://doi.org/10.3390/agronomy12081754
• Averill, K.M., A.S. Westbrook, S.H. Morris, E. Kubinksi, and A. DiTommaso. 2022. Silage corn yield is reduced by burcucumber competition and drought in New York State. Weed Technology 36(1):86-92. DOI: https://doi.org/10.1017/wet.2021.80
• Averill, K.M., S.H. Morris, A.S. Westbrook, M.C. Hunter, and A. DiTommaso. 2022. Ivyleaf morningglory competition is not intensified by drought in silage corn in central New York State. Canadian Journal of Plant Science. In Press. https://cdnsciencepub.com/doi/pdf/10.1139/CJPS-2022-0002
• Brown, B., E.R. Gallandt, A. DiTommaso, P. Salon, R.G. Smith, M.R. Ryan, and S. Cordeau.  2022. Improving weed management based on the timing of emergence peaks: A case study of problematic weeds in the Northeast USA. Frontiers in Agronomy. https://www.frontiersin.org/articles/10.3389/fagro.2022.888664/full
• Cheng, L., A. DiTommaso, and J. Kao-Kniffin. 2022. Opportunities for microbiome suppression of weeds using regenerative agricultural technologies. Frontiers in Soil Science. February 15, 2022. https://www.frontiersin.org/articles/10.3389/fsoil.2022.838595/abstract
• DiTommaso, A., C.L. Mohler, and A.S. Westbrook. 2022. Response of Galinsoga quadriradiata to nitrogen, phosphorus, and competition from lettuce. Weed Science. In Press. DOI: https://doi.org/10.1017/wsc.2022.40
• Law, E.P., S. Wayman, C.J. Pelzer, A. DiTommaso, and M.R. Ryan. 2022. Tradeoffs between grain and straw production from perennial Kernza intermediate wheatgrass and annual winter wheat in central New York State. Accepted, Agronomy Journal 114(1):700-716. https://doi.org/10.1002/agj2.20914
• Law, E.P., S. Wayman, C.J. Pelzer, S.W. Culman, M.I. Gomez, A. DiTommaso, and M.R. Ryan. 2022. Multi-criteria assessment of the economic and environmental sustainability characteristics of intermediate wheatgrass as a dual-purpose grain and forage crop.  Sustainability. https://www.mdpi.com/2071-1050/14/6/3548
• Losey, J., L. Allee, H. Gill, S. Morris, R. Smyth, D. Wolleman, A.S. Westbrook, and A. DiTommaso. 2022. Predicting plant attractiveness to coccinellids with plant trait profiling, citizen science, and common garden surveys. Biological Control 176 (Dec 2022) 105063. https://doi.org/10.1016/j.biocontrol.2022.105063
• Magidow, L., A. DiTommaso, A.S. Westbrook, M. Kwok, Q.M. Ketterings, and L.R. Milbrath. 2022. Soil characteristics of North American sites colonized by two no-native invasive vines black and pale swallow-wort. Northeastern Naturalist 29(1):108-132. https://doi.org/10.1656/045.029.0111
• Milbrath, L.R., J. Biazzo, S.H. Morris, and A. DiTommaso. 2022. Response of Vincetoxicum nigrum (black swallowwort) to herbicides plus mowing. Invasive Plant Science and Management. 15(4):161-167. DOI: https://doi.org/10.1017/inp.2022.27
• Qin, Z., J.E. Zhang, A. DiTommaso, J.M. Diez, Y. Zhao, and F.G. Wang. 2022. Predicting the potential distribution of three allergenic invasive Ambrosia (ragweed) species in Asia. Journal of Environmental Informatics 39(1):49-66. doi:10.3808/jei.202000444
• Shen, H., S. Dong, A. DiTommaso, J. Xiao, M. Yang, and Y. Zhi. 2022.  N deposition promotes aboveground plant productivity of an alpine meadow through increased dominance of graminoids: A three-year case study from the Qinghai-Tibetan Plateau. Frontiers in Plant Science. March 4, 2022. https://www.frontiersin.org/articles/10.3389/fpls.2022.811970/full
• Westbrook, A.S., V. Bhaskar, and A. DiTommaso. 2022. Weed control and community composition in living mulch systems. Weed Research 62(1):12-23. https://doi.org/10.1111/wre.12511
• Wolff, A.C., A.S. Westbrook, and A. DiTommaso. 2022. In the ruins: The neglected link between archaeology and weed science.  Weed Science 70(2):135-143 (invited article). https://doi.org/10.1017/wsc.2022.11
• Bhaskar, V., A.S. Westbrook, R.R. Bellinder, and A. DiTommaso. 2021. Integrated management of living mulches for weed control: A review. Weed Technology 36(5):856-868. https://doi.org/10.1017/wet.2021.52
• DiTommaso, A., K.M. Averill, Z. Qin, M. Ho, A.S. Westbrook, and C.L. Mohler. 2021. Biomass allocation of Vincetoxicum rossicum and V. nigrum (Apocynaceae) in contrasting competitive environments. American Journal of Botany 108(9):1646-1661. https://doi.org/10.1002/ajb2.1734
• Shen, H., S. Dong, A. DiTommaso, J. Xiao, and Y. Zhi. 2021. N deposition may accelerate grassland degradation succession from grasses- and sedges-dominated into forbs-dominated in overgrazed alpine grassland systems on Qinghai-Tibetan Plateau. Ecological Indicators 129(2021) 107898. https://doi.org/10.1016/j.ecolind.2021.107898
• Westbrook, A.S., R. Han, J. Zhu, S. Cordeau, and A. DiTommaso. 2021. Drought and competition with ivyleaf morningglory (Ipomoea hederacea) inhibits corn and soybean growth. Frontiers in Agronomy 3:720287. https://doi.org/10.3389/fagro.2021.720287
• Menalled, U.D., S.J. Pethybridge, C.J. Pelzer, R.G. Smith, A. DiTommaso, and M.R. Ryan. 2021. High seeding rates and low soil nitrogen environments optimize weed suppression and profitability in organic no-till planted soybean. Frontiers in Agronomy May 2021/Volume 3/Article 678567.  doi.org/10.3389/fagro.2021.678567
• Bhaskar, V., R.R. Bellinder, S. Reiners, A.S. Westbrook, and A. DiTommaso. 2021. Significance of herbicide order in sequential herbicide applications to target weeds in a sunn hemp living mulch. Weed Technology. doi:10.1017/wet.2021.15
• Little, N.G., A. DiTommaso, A.S. Westbrook, Q.M. Ketterings, and C.L. Mohler. 2021. Effects of fertility amendments on weed growth and weed-crop competition: A review.  (Invited paper). Weed Science 69(2):132-146 doi.org/10.1017/wsc.2021.1
• Law E.P., C.J. Pelzer, S. Wayman, A. DiTommaso, and M.R. Ryan. 2021. Strip-tillage renovation of intermediate wheatgrass (Thinopyrum intermedium) for maintaining grain yield in mature stands. Renewable Agriculture and Food Systems 1–7. doi.org/10.1017/S1742170520000368
• DiTommaso, A., L.R. Milbrath, C.A. Marschner, S.H. Morris, and A.S.  Westbrook. 2021. Seed germination ecology of meadow knapweed (Centaurea × moncktonii) populations in New York State, USA. Weed Science 69(1):111-118.   doi.org/10.1017/wsc.2020.86
• Menalled, U.D., K.A. Bybee-Finley, R.G. Smith, A. DiTommaso, S.J. Pethybridge, and M.R. Ryan. 2020. Soil-mediated effects on weed-crop competition: Elucidating the role of annual and perennial intercrop diversity legacies. Agronomy 2020, 10, 1373. doi:10.3390/agronomy10091373
• Shen, H., S. Dong, A. DiTommaso, S. Li, J. Xiao, M. Yang, J. Zhang, X. Gao, Y. Xu, Y. Zhi, S. Liu, Q. Dong, W. Wang, and P. Liu. 2020. Eco-physiological processes are more sensitive to simulated N deposition in leguminous forbs than non-leguminous forbs in an alpine meadow of the Qinghai-Tibetan Plateau. 2020. Science of the Total Environment 744 (2020) 140612. doi.org/10.1016/j.scitotenv.2020.140612
• Sousa-Ortega, C., A. Royo-Esnal, A. DiTommaso, J. Izquierdo, I. Loureiro, A.I. Marí, F. Cordero, M. Vargas, M. Saavedra, J.A. Paramio, J.L. Fernández, J. Torra, J.M. Urbano. 2020. Modeling the emergence of Centaurea diluta, an increasingly troublesome weed in Spain. Weed Science 68(3):268-277. doi.org/10.1017/wsc.2020.22
• Zhu, J., Wen Liang, Siyu Yang, Huifu Wang, Chunhua Shi, Shuo Wang, Weijun Zhou, Qiang Lu, Faisal Islam, Weidong Xu, and A. DiTommaso. 2020. Safety of oilseed rape straw mulch of different lengths to rice and its suppressive effects on weeds. Agronomy 2020, 10, 201; doi:10.3390/agronomy10020201
• Zhu, J., J. Wang, A. DiTommaso, C. Zhang, G. Zheng, W. Liang, F. Islam, C. Yang, X. Chen, and W. Zhou. 2020. Weed research status, challenges, and opportunities in China. Crop Protection 134(2020) 104449. doi.org/10.1016/j.cropro.2018.02.001
• Youngerman, C.Z., A. DiTommaso, J.E. Losey, and M.R. Ryan. 2020. Cover crop and weed seed preference of four common weeds seed predators. Renewable Agriculture and Food Systems 35(5):522-532. doi.org/10.1017/S1742170519000164
• Bhaskar, V., R.R. Bellinder, S. Reiners, and A. DiTommaso. 2020. Reduced herbicide rates for control of living mulches and weeds in fresh market tomato. Weed Technology 34(1):55-63. doi.org/10.1017/wet.2019.81
• Ball, M.G., B.A. Caldwell, A. DiTommaso, L.E. Drinkwater, C.L. Mohler, R.G. Smith, and M.R. Ryan. 2019. Weed community structure and soybean yields in a long-term organic cropping systems experiment. Weed Science 67(6):673–681. doi: 10.1017/wsc.2019.44
• Iqbal, J., A. DiTommaso, M. Ishaq, A. Rehmani, K. Jabran, S. Hussain, W. Nasim, S. Fahad, M.A. Shehzad, and A. Ali. 2019. Purple nutsedge (Cyperus rotundus) control through interference by summer crops. International Journal of Agriculture and Biology 21(5):1083-1088. doi: 10.17957/IJAB/15.0997
• Milbrath, L.R., J. Biazzo, A. DiTommaso, and S. Morris. 2019. Impact of Abrostola asclepiadis combined with other stressors on invasive swallow-worts (Vincetoxicum species). Biological Control. 130(3): 118-126. doi.org/10.1016/j.biocontrol.2018.11.005
• Mohler, C. L., Caldwell, B. A., Marschner, C. A., Cordeau, S., Maqsood, Q., Ryan, M. R., & DiTommaso, A. (2018). Weed Seedbank and Weed Biomass Dynamics in a Long-Term Organic Vegetable Cropping Systems Experiment. Weed Science. 66:611-626.
• Youngerman, C. Z., DiTommaso, A., Curran, W. S., Mirsky, S. B., & Ryan, M. R. (2018). Corn Density Effect on Interseeded Cover Crops, Weeds, and Grain Yield. Agronomy Journal. 110:2478-2487.
• DiTommaso, A., Stokes, C. A., Cordeau, S., Milbrath, L. R., & Whitlow, T. H. (2018). Seed-Dispersal Ability of the Invasive Perennial Vines Vincetoxicum nigrum and Vincetoxicum rossicum. Invasive Plant Science and Management. 11:10-19.
• Zhu, J., Wang, J., DiTommaso, A., Zhang, C., Zheng, G., Liang, W., Islam, F., Yang, C., Chen, X., & Zhou, W. (2018). Weed research status, challenges, and opportunities in China. Crop Protection.
• Averill, K. M., Mortensen, D. A., Smithwick, Erica A. H.,, Kalisz, S., McShea, W. J., Bourg, N. A., Parker, J. D., Royo, A. A., Abrams, M. D., Apsley, D. K., Blossey, B., Boucher, D. H., Caraher, K. L., DiTommaso, A., Johnson, S. E., Masson, R., & Nuzzo, V. A. (2018). A regional assessment of white-tailed deer effects on plant invasion. AoB Plants. 10.
• Mohler, C. L., Taylor, A. G., DiTommaso, A., Hahn, R. R., & Bellinder, R. R. (2018). Effects of Incorporated Rye and Hairy Vetch Cover Crop Residue on the Persistence of Weed Seeds in the Soil. Weed Science. 66:379-385.
• Bhaskar, V., Bellinder, R. R., DiTommaso, A., & Walter, M. F. (2018). Living Mulch Performance in a Tropical Cotton System and Impact on Yield and Weed Control. Agriculture. 8.
• Cordeau, S., Smith, R. G., Gallandt, E. R., Brown, B., Salon, P., DiTommaso, A., & Ryan, M. R. (2017). How do weeds differ in their response to the timing of tillage? A study of 61 species across the northeastern United States. Annals of Applied Biology. 171:340-352.
• Young, S. L., Clements, D. R., & DiTommaso, A. (2017). Climate Dynamics, Invader Fitness, and Ecosystem Resistance in an Invasion-Factor Framework. Invasive Plant Science and Management. 10:215-231.
• Jernigan, A. B., Caldwell, B. A., Cordeau, S., DiTommaso, A., Drinkwater, L. E., Mohler, C. L., & Ryan, M. R. (2017). Weed abundance and community composition following a long-Term organic vegetable cropping systems experiment. Weed Science. 65:639-649.

Books

• Neal, J.C., R.H. Uva, J.M. DiTomaso, and A. DiTommaso (2023) Weeds of the Northeast. Second Edition. Cornell University Press. 592 p.
• Mohler, C.L., J. Teasdale, and A. DiTommaso. 2021. Manage Weeds on Your Farm: A Guide to Ecological Strategies.  Sustainable Agriculture Research and Education Press (SARE Handbook Series, 16). 416 p. College Park: MD. https://www.sare.org/resources/manage-weeds-on-your-farm/
• Manage Weeds on Your Farm: A Guide to Ecological Strategies received a 2022 ACE’s silver award in the Publishing-Technical Publications category. ACE is a professional association largely made up of communicators in the state Extension systems (https://aceweb.org/).

Book Chapters

• Kumar V., M.Z. Tugoo, P. Jha, A. DiTommaso, and K. Al-Khatib. 2025. Chapter 10. Weed management in pearl millet: Challenges and opportunities. In: R. Perumal, P.V. Vara Prasad, C. Tara Satyavathi, M. Govindaraj, and A. Tenkouano (eds.). Pearl Millet – A Resilient Cereal Crop for Food, Nutrition, and Climate Security. Agronomy Monograph, John Wiley & Sons, Hoboken, NJ, USA. pp. 277-298.
• Westbrook, A. S., A. DiTommaso, and F.D. Menalled. 2025. Chapter 1. Ecological principles in the study of edible weeds. In: R. Ebel and F. Menalled (Eds.), Agroecology of Edible Weeds and Noncrop Plants. Ecology and Socioeconomic Potential of the Associated Plant Biodiversity. Academic Press, London, UK. pp. 3-23.
• Westbrook, A.S., E. Nikkel, D.R. Clements, and A. DiTommaso. 2023. Chapter 16. Modeling and Managing Invasive Weeds in a Changing Climate. In: L.H. Ziska, ed. Invasive Species and Global Climate Change. Second Edition. CABI Publishing, Wallingford, UK. pp. 282-306.
• Clements, D.R. and A. DiTommaso. 2022. Chapter 12. Climate change and the persistence of weeds. In: Upadhyaya, M.K., D.R. Clements, and A. Shrestha, eds. Persistence Strategies of Weeds. First Edition. John Wiley & Sons, Hoboken, NJ. pp. 219-243.
• Woodbury, P.B., A. DiTommaso, J. Thies, M. Ryan, and J. Losey. 2017. Chapter 6. Effects of transgenic crops on the environment. In: M. Coll and E. Wajnberg, eds. Pest Management within the Environment: Challenges for Agronomists, Ecologists, Economists and Policymakers. John Wiley & Sons, London, UK. pp. 131-150.
• DiTommaso, A., Q. Zhong, and D.R. Clements. 2014. Identifying Climate Change as a Factor in the Establishment and Persistence of Invasive Weeds in Agricultural Crops. In: L.H. Ziska and J.S. Dukes, eds. Invasive Species and Global Climate Change. CABI Publishing, Wallingford, UK. pp. 253-270.
• Clements, D.R., A. DiTommaso, and T. Hyvönen. 2014. Chapter 2. Ecology and Management of Weeds in a Changing Climate. In: B.S. Chauhan and G. Mahajan, eds. Recent Advances in Weed Management. Springer Science+Media, New York, NY, USA pp. 13-37.

Presentations and Activities

• The Sky Measures Little – exhibit. Invited Panelist for a conversation with artist Precious Okoyomon.  Johnson Museum, Ithaca, NY. October 24, 2024.
• The biology and management of common invasive plants in the northeastern U.S. and southern Canada – presentation. Invited Webinar Speaker. NE-IPM Webinar IPM Toolbox Series. NE-IPM Center, Ithaca, NY. February 27, 2024.
• A Summary of the Agronomic and Health Impacts of Ragweeds in the United States – presentation. Invited Virtual Keynote Speaker. 25th COLUMA Annual Conference on Weed Management. Végéphyl. Orléans, France. December 6, 2023.
• What’s that Weed? – presentation. Invited Webinar Speaker. NE-IPM Webinar IPM Toolbox Series. NE-IPM Center, Ithaca, NY. September 21, 2023.
• Modeling Invasive Weed Distributions under Future Climate Scenarios. Invited Symposium Speaker. Theme of Symposium: Crop-Weed Management in a Rising CO2 and Warming World. February 2023. Joint Meeting of the Weed Science Society of America and Northeastern Weed Science Society. Arlington, VA, USA.
• Invasive Plants: Is Quebec Agriculture Threatened? Invited Keynote Speaker. Virtual Presentation. March 2022. Union des Producteurs Agricoles (UPA) “Meet n‘Greet” Conference. -Montérégie, Quebec, Canada.
• Employing Ecological Strategies to Manage Weeds with Cover Crops. Invited Session Speaker. Virtual Meeting. March 2022. Northeast Cover Crops Council Conference.
• Weed Migrations and Climate Change: Staying at the Forefront. Invited Plenary Speaker. Virtual Meeting. February 2021. Invasives 2021 Virtual Forum and AGM.
• Weed Migrations and Climate Change. Invited Plenary Speaker. Virtual Meeting. November 2020. 74th Annual Meeting of the Canadian Weed Science Society.
• Climate change and weed migration: What do we know and what next? 21st Australasian Weeds Conference. September 2018. The Weed Society of New South Wales Inc., on behalf of the Council of Australasian Weed Societies Inc.. Sydney, Australia.
• Impact of drought on competition between ivyleaf morningglory and corn. Northeastern Plant, Pest, and Soils Conference. July 2018. Northeastern Weed Science Society. Philadelphia, PA United States.
• When it comes to tillage, timing matters and drives weed communities. 18th European Weed research Society Symposium. June 2018. European Weed research Society. Ljubljana, Slovenia.
• Seed germination ecology of meadow knapweed (Centaurea x moncktonii) populations in New York State. Annual Meeting of the Weed Science Society of America. January 2018. Weed Science Society of America. Arlington, VA.
• Weed seedling emergence in two extreme years in Central New York State. Annual Meeting of the Weed Science Society of America. January 2018. Weed Science Society of America. Arlington, VA.
• New F.A.C.E.S.: Fostering Agricultural Extension and Communication Students – A USDA‐HEMSP Supported Project at Cornell University. NACTA Annual Conference. June 2014. North American Colleges and Teachers of Agriculture (NACTA),. Bozeman, MT .
• Climate change and the ecology and management of weeds: What do we know? 2013 Northeast Region Certified Crop Adviser (NRCCA) Annual December Training Meeting. . December 2013. Northeast Region Certified Crop Adviser (NRCCA) . Syracuse, NY.
• Update: Invasive plants of increasing concern. 7th Annual Invasive Species Track. Cornell Cooperative Extension In-service Agriculture and Food Systems Program. . November 2013. CCE. Ithaca, NY.

• 2025 Outstanding Achievements in IPM Award from the Northeastern IPM Center
• 2024 CALS Outstanding Service to the CALS Community Award
• 2023 Fellow Award from the Weed Science Society of America
• 2019 USDA Excellence in College and University Teaching in the Food and Agricultural Sciences – Regional Award
• 2019 Fellow Northeastern Weed Science Society
• 2018 Outstanding Researcher Award, Northeastern Weed Science Society
• 2017 Stephen H. Weiss Presidential Fellow, Cornell University
• 2015 CSSA Crop Science Teaching Award, Crop Science Society of America
• 2015 Excellene in IPM Award, New York State Integrated Pest Management Program

My teaching philosophy is founded on respect both for students as individuals and for the pedagogical process. My approach is based on the following belief: As students become active observers, they will be motivated to seek and learn new ways to discover, problem-solve, collaborate, and develop critical thinking. Thus, it is my role and responsibility as a teacher, to seek ways to stimulate, encourage, and enhance students` curiosity.

Undergraduate Courses Taught:

• PLSCI 3150/5150 - Weed Biology & Management - (Fall term) 4 credits.
• ENTOM/PLSCI 4440/5440 - Integrated Pest Management (Spring term) - 4 credits. Course website:

Graduate Courses Taught:

• PLSCS 6140 Weed Ecology and Management (Spring term) - 3 credits - offered in odd years only.