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Dr. Charles Mohler

Senior Research Associate

Refereed Journal Article

2018Mohler, C.L., B.A. Caldwell, C.A. Marschner, S. Cordeau, Q. Maqsood, M.R. Ryan, and A. DiTommaso. 2018. Weed seed bank and weed biomass dynamics in a long-term organic vegetable cropping systems experiment. Weed Science 66(5):611-626. doi: 10.1017/wsc.2018.52
Mohler, C.L., A.G. Taylor, A. DiTommaso, R.R. Hahn, and R.R. Bellinder. 2018. Effects of incorporated rye and hairy vetch cover crop residue on the persistence of weed seed in the soil. Weed Science 65(3):379-385. doi: 10.1017/wsc.2017.80
2017DiTommaso, A., L.R. Milbrath, S.H. Morris, C.L. Mohler, and J. Biazzo. 2017. Seedbank dynamics of two swallowwort (Vincetoxicum) species. Invasive Plant Science and Management 10(2):136-142.
Jernigan, A.B., B.A. Caldwell, S. Cordeau, A. DiTommaso, L.E. Drinkwater, C.L. Mohler, and M.R. Ryan. 2017. Weed abundance and community composition following a long-term organic vegetable cropping systems experiment. Weed Science 65(5):639-649.
2016Mohler, C.L., C.A. Marschner, B.A. Caldwell, and A. DiTommaso. 2016. Weed mortality caused by row-crop cultivation in organic corn-soybean-spelt cropping systems. Weed Technology 30(3):648-654. View
Mohler, C.L., J. Iqbal, J. Shen, and A. DiTommaso. 2016. Effects of water on recovery of weed seedlings following burial. Weed Science. 64(2):285-293View
2015Little, N.G., C.L. Mohler, Q.M. Ketterings, and A. DiTommaso. 2015. Effects of organic nutrient amendments on weed and crop growth. Weed Science 63(3):710-722.View
2014DiTommaso, A., M.R. Ryan, C.L. Mohler, D.C. Brainard, R.E. Shuler, L.L. Allee and J.E. Losey. 2014. Effect of Cry3Bb Bt corn and tefluthrin on post-dispersal weed seed predation. Weed Science 62(4):619-624.View
Caldwell, B.A., C.L. Mohler, Q.M. Ketterings, and A. DiTommaso. 2014. Yields and profitability during and after transition in organic grain cropping systems. Agronomy Journal 106(3):871-880.View
2013Magidow, L.C., A. DiTommaso, Q.M. Ketterings, C.L. Mohler, and L.R. Milbrath. 2013. Emergence and performance of two invasive swallow-worts (Vincetoxicum spp.) in contrasting soil types and soil pH. Invasive Plant Science and Management. 6(2):281-291.View
2012Mohler, C.L., C. Dykeman, E.B. Nelson, and A. DiTommaso. 2012. Reduction in weed seedling emergence by pathogens following the incorporation of green crop residue. Weed Research 52(5): 467-477.View
2011Averill, K.M., A. DiTommaso, C.L. Mohler and L.R. Milbrath. Survival, growth, and fecundity of the invasive swallowworts (Vincetoxicum rossicum and V. nigrum) in New York State. Invasive Plant Science and Management 4(2):198-206.View
2010Blanchard, M. L., J. N. Barney, K. M. Averill, C. L. Mohler, A. DiTommaso. Does polyembryony confer a competitive advantage to the invasive perennial vine Vincetoxicum rossicum (Apocynaceae)?. American Journal of Botany, 97, 251-260. View
Averill, K.M., A. DiTommaso, C.L. Mohler and L.R. Milbrath. Establishment of the invasive perennial Vincetoxicum rossicum across a disturbance gradient in New York State, USA. Plant Ecology 211(1): 65-77View
2008Hotchkiss, E.E., A. DiTommaso, D.C. Brainard, and C. L. Mohler. 2008. Survival and performance of the invasive vine Vincetoxicum rossicum (Apocynaceae) from seeds of different embryo number under two light environments. American Journal of Botany 95:447-453.View
Shuler, R. E., A. DiTommaso, J. E. Losey, and C. L. Mohler. Post-dispersal weed seed predation is affected by experimental substrate. Weed Science, 56(6):889-895.View
2007Brainard, D. C., A. DiTommaso, and C. L. Mohler. Interspecific variation in seed characteristics of Powell amaranth (Amaranthus powellii) from habitats with contrasting crop rotation histories. Weed Science 55:218-226.View
2006Mohler, C. L., J. C. Frisch and C. E. McCulloch. Vertical movement of weed seed surrogates by tillage implements and natural processes. Soil and Tillage Research 86:110-122.View
Brainard, D. C., A. DiTommaso, and C. L. Mohler. Intraspecific variation in germination response to ammonium nitrate of Amaranthus powellii seeds originating on organic versus conventional vegetable farms. Weed Science 54:435-442.View
2004Clements, D. R., A. DiTommaso, N. Jordan, B. D. Booth, J. Cardina, D. Doohan, C. L. Mohler, S. D. Murphy, and C. L. Swanton. Adaptability of plants invading North American cropland. Agriculture, Ecosystems & Environmrent. 104:379-398.View
McDonald, A, S. Riha, and C. L. Mohler. Mining the record: historical evidence for climatic influences on maize - Abutilon theophrasti competition Weed Research 44(6): 439-445. View
2003Long, Z. T., C. L. Mohler, and W. P. Carson. Extending the resource concentration hypothesis to plant communities: effects of litter and herbivores. Ecology 84:652-665View
2002Sawma, J. T. and C. L. Mohler. Evaluating seed viability by an unimbibed seed crush test with comparison to the tetrazolium test. Weed Technology 16:781-786.View
2001Caldwell, B. and C. L. Mohler. Stale seedbed practices for vegetable production. HortScience 36:703-705.
2000Teasdale, J. R. and C. L. Mohler. The quantitative relationship between weed emergence and the physical properties of mulches. Weed Science 48:385-392.View
1999Kuo, W-L., T. S. Steenhuis, C. E. McCulloch, C. L. Mohler, D. Weinstein, S. DeGloria, and D. Swaney. Effect of grid size on runoff and soil moisture for a variable-source-area hydrology model. Water Resources Research 35:3419-3428.View
1997Mohler, C. L., J. C. Frisch and J. Mt. Pleasant. Evaluation of mechanical weed management programs for corn (Zea mays). Weed Technology 11:123-131.View
Mohler, C. L. and A. Galford. Weed seedling emergence and seed survival: separating the effects of seed position and soil modification by tillage. Weed Research 37:147-155.
1996Mohler, C. L. Ecological bases for the cultural control of annual weeds. Journal of Production Agriculture 9:468-474.
1995Mohler, C. L and M. B. Callaway. Effects of tillage and mulch on weed seed production and seed banks in sweet corn. Journal of Applied Ecology 32:627-639.View
Lynn, H., C. Mohler, S. DeGloria and C. McCulloch. Error assessment in decision-tree models applied to vegetation analysis. Landscape Ecology 10:323-335.View
1994Dushoff, J., B. Caldwell and C. L. Mohler. Evaluating the environmental impact of pesticides: a critique of the environmental impact quotient. American Entomologist 40:180-184.
1993Mohler, C. L. A model of the effects of tillage on emergence of weed seedlings. Ecological Applications 3:53-73.View
Teasdale, J. R. and C. L. Mohler. Light transmittance, soil temperature, and soil moisture under residue of hairy vetch and rye. Agronomy Journal 85:673-680.
Mohler, C. L. and J. R. Teasdale. Response of weed emergence to rate of Vicia villosa Roth and Secale cereale L. residue. Weed Research 33:487-499.View
1992Mohler, C. L. and M. B. Callaway. Effects of tillage and mulch on the emergence and survival of weeds in sweet corn. Journal of Applied Ecology 29:21-34.View
1991Mohler, C. L. Effects of tillage and mulch on weed biomass and sweet corn yields. Weed Technology, 5:545-552.
Crews, T. E., C. L. Mohler and A. G. Power. Energetics and ecosystem integrity: the defining principles of sustainable agriculture. American Journal of Alternative Agriculture, 6:146-149.
1990Mohler, C. L. Co-occurrence of oak subgenera: implications for niche differentiation. Bulletin of the Torrey Botanical Club 117:247-255.View
1987Mohler, C. L. and M. Liebman. Weed productivity and composition in sole crops and mixed crops of barley and field peas. Journal of Applied Ecology 24:685-699.View
1986Morris, W. F., P. L. Marks, C. L. Mohler, N. R. Rappaport, F. R. Wesley, and M. A. Moran. Seed dispersal and seedling emergence in an old field community in central New York (U.S. A.). Oecologia 70:92-99.View
1985Marks, P. L. and C. L. Mohler. Succession after elimination of buried seeds from a recently plowed field. Bulletin of the Torrey Botanical Club 112:376-382.View
1983Wilson, M. V. and C. L. Mohler. Measuring compositional change along gradients. Vegetatio 54:129-141.View
Mohler, C. L. Effect of sampling pattern on estimation of species distribution along gradients. Vegetatio 54:97-102.View
1981Mohler, C. L. Effects of sample distribution on eigenvector ordination. Vegetatio 45:141-145.View
1978Mohler, C. L., P. L. Marks and D. G. Sprugel. Stand structure and allometry of trees during self-thinning of pure stands. Journal of Ecology 66:599-614. View
Mohler, C. L., T. Bjorkman, and K. Martens, and A. DiTommaso. Response of weed size and density to compost application rate in an organic grain rotation. For American Journal of Sustainable Agriculture, In prep.
Mohler, C. L., C. Dykeman, E. Nelson, and A. DiTommaso. Reduction of weed seedling emergence by pathogenic fungi following incorporation of green crop residue. For Weed Research, In prep.

Refereed Book Chapter or Section

2009Bolluyt, J., P. Lowy and C. L. Mohler. Linking a field map and spreadsheet in Microsoft Excel. Pp 148-149 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. and M. T. McGrath. Crop diseases hosted by common agricultural weeds. Pp 142-147 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler. C. L. Characteristics of common agricultural weeds relevant to crop rotation. Pp 138-141 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. Crop sequence problems and opportunities. Pp 104-123 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. and A. Rangarajan. Characteristics of crops commonly grown in the northeastern U.S.A. Pp 101-103 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. and K. A. Stoner. Guidelines for intercropping. Pp 95-100 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds., pp. . Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. Crop rotation during the transition from conventional to organic agriculture. Pp 91-94 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. A crop rotation planning procedure. Pp 58-90 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. The role of crop rotation in weed management. Pp 44-46 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. What this chapter is about. Pp 21-23 In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
Mohler, C. L. Introduction. Pp 1-2. In, Crop Rotation on Organic Farms: A Planning Manual, C. L. Mohler and S. E. Johnson eds. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY.
2002Mohler, C. L. Mechanical weed control in agriculture. In, Encyclopedia of Pest Management, Supplement 2, D. Pimentel, ed. Marcel Dekker, New York. View
DiTommaso, A., C.L. Mohler, and R.E. Nurse. Herbaceous weeds, In Pest Control, R. Lal. Ed. In: Encyclopedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, Eolss Publishers, Oxford, UK.View
2001Mohler, C. L., M. Liebman, and C. Staver. Weed management: The broader context Pp. 494-518, in, Ecological Management of Agricultural Weeds, M. Liebman, C. L. Mohler and C. Staver. Cambridge University Press, Cambridge.
Mohler, C. L. Weed evolution and community structure. Pp. 444-493, in, Ecological Management of Agricultural Weeds, M. Liebman, C. L. Mohler and C. Staver. Cambridge University Press, Cambridge.
Mohler, C. L. Enhancing the competitive ability of crops. Pp. 269-231, in Ecological Management of Agricultural Weeds, M. Liebman, C. L. Mohler and C. Staver. Cambridge University Press, Cambridge.
Liebman, M., and C.L. Mohler. Weeds and the soil environment. Pp. 210-268, in Ecological Management of Agricultural Weeds, M. Liebman, C. L. Mohler and C. Staver. Cambridge University Press, Cambridge.
Mohler, C. L. Mechanical management of weeds. Pp. 139-209, in Ecological Management of Agricultural Weeds, M. Liebman, C. L. Mohler and C. Staver. Cambridge University Press, Cambridge.
Mohler, C. L. Weed life history: Identifying vulnerabilities. Pp. 40-98, in, Ecological Management of Agricultural Weeds, M. Liebman, C. L. Mohler and C. Staver. Cambridge University Press, Cambridge.

Presentation with Abstract

2016DiTommaso, A., L.R. Milbrath, S.H. Morris, C.L. Mohler, and J. Biazzo. 2016. Seed bank dynamics of invasive swallowworts. In: Gover, A.E. (ed.) Proceedings of the Northeastern Plant, Pest, and Soils Conference, 70:127.
2015Iqbal, J., C. Mohler, and A. DiTommaso. 2015. Effects of water on recovery of weed seedlings following burial. In: Tielkes, E. (ed.) Tropentag 2015 – International Research on Food Security, Natural Resource Management and Rural Development - Plant Production under water and soil regimes. Cuvillier Verlag, Göttingen, Germany. p. 156 (ID 917).
DiTommaso, A., L.R. Milbrath, S.H. Morris, C.L. Mohler, and J. Biazzo. 2015. Seed bank dynamics of invasive swallowworts. In: Gover, A.E. (ed.) Proceedings of the 69th Annual Meeting of the Northeastern Weed Science Society, 69:19.
2014Stokes, C.A., A. DiTommaso, L.R. Milbrath, C.L. Mohler, and T. Whitlow. 2014. Swallowwort dispersal: Seed tracking under field conditions. In: Gover, A.E. (ed.) Proceedings of the 68th Annual Meeting of the Northeastern Weed Science Society, 68:59.
DiTommaso, A., Z. Qin, M. Ho, C.L. Mohler, and K.A. Averill. 2014. Biomass allocation of two swallowwort species in contrasting competitive environments. In: Gover, A.E. (ed.) Proceedings of the 68th Annual Meeting of the Northeastern Weed Science Society, 68:99.
2013Torresen, K.S., E. Haugland, A. DiTommaso, C.L. Mohler, and M. Jorgensen. 2013. Sprouting ability of different parts of the taproot of Anthriscus sylvestris. 16th European Weed Research Society Symposium, Samsun, Turkey. June 24-27, 2013. Abstract #S1-P-037.
Marschner, C., C.L. Mohler, M. Ryan, B. Caldwell, and A. DiTommaso. 2013. Weed management in organic grain systems. Abstracts from the Joint Annual Meeting of the Weed Science Society of America and Northeastern Weed Science Society. February 4-7, Baltimore, MD. No. 361.
Mohler, C.L., B. Caldwell, C. Marschner, and A. DiTommaso. 2013. Mortality of weeds due to tine weeding and inter-row cultivation in corn and soybeans. Abstracts from the Joint Annual Meeting of the Weed Science Society of America and Northeastern Weed Science Society. February 4-7, Baltimore, MD. No. 248.
Stokes, C.A., A. DiTommaso, C.L. Mohler, and L.R. Milbrath. 2013. Preliminary studies on seed dispersal of swallow-wort (Vincetoxicum spp.). Abstracts from the Joint Annual Meeting of the Weed Science Society of America and Northeastern Weed Science Society. February 4-7, Baltimore, MD. No. 197.
Kordbacheh, F., C.L. Mohler, A. DiTommaso, and H. Rahimian Mashhadi. 2013. Effects of different cutting methods and timing on seed viability and germination of three annual weed species. Abstracts from the Joint Annual Meeting of the Weed Science Society of America and Northeastern Weed Science Society. February 4-7, Baltimore, MD. No. 195.

Education & Extension Publications/Presentations

2011Caldwell, B., C. L. Mohler, Q. Ketterings and A. DiTommaso. 2011. Yields and profitability during and after transition in the Cornell Organic Grain Cropping Systems Experiment. What's Cropping Up 21(2):7-11.

Non-refereed Publication

2010Seaman, A. (ed.), M. Kirkwyland, E. Graeper Thomas, G.Abawi, M. Glos, B. Gugino, D. Halseth, M. Helms, A. Leed, C. L. Mohler, A. Rangarajan,View
Seaman, A. (ed.), E. Graeper Thomas, M.Kirkwyland, G. Abawi, B. Gugino, M. Helms, M. McGrath, C. Mohler, A. Rangarajan, and W. Tingey. 2010 Production Guide for Organic Lettuce.View
Seaman, A. (ed.), M. Kirkwyland, E. Graeper Thomas, G. Abawi, B. Gugino, M. Helms, M. McGrath, C. Mohler, A. Rangarajan, and W. Tingey. 2010 Production Guide for Organic Spinach.View
Seaman, A. (ed.). E. Graeper Thomas, M. Kirkwyland, G. Abawi, T. Bjorkman, A. Cobb, B. Gugino, R. Hadad, M. Helms, C.Hoepting, M. McGrath, C. Mohler, A. Rangarajan, A. Shelton, and C. Smart. 2010 Production Guide for Organic Cole Crops.View
2009Mohler, C. L. Important considerations in crop rotation and the new crop rotation manual. Proceedings of the 2009 Empire State Fruit and Vegetable Expo, Syracuse NY, Feb. 11-12, 2009, pp. 131-133. Cornell Cooperative Extension: Ithaca, NY.
Mohler, C. Outwitting weeds, part II. Organic Farms, Folks and Foods. Spring 2009:18-19.
Godwin, G., Q. M. Ketterings, C. L. Mohler, B. Caldwell, and K. Czymmek. Impact of clover incorporation and ammonium nitrate sidedressing on ammonium, nitrate and Illinois Soil Nitrogen Test dynamics over time. What's Cropping Up? 19(3):12-15.
Seaman, A. (ed.)View
Mohler, C. L. Is your fertility management creating weed problems? Tails and Tassels ll(4):6-7.
Mohler, C. L. Fertility effects on the yield of spelt and corn in the Organic Grain Cropping Systems Experiment. Tails and Tassels 11(4):5-6.
Mohler, C. Crop rotation on organic farms. P. 123 in Building Soils for Better Crops: Sustainable Soil Management, F. Magdoff and H. van Es. Sustainabel Agriculture Research and Education (SARE): Waldorf, MD.
2008Isaacs, K., C. L. Mohler, B. Caldwell, R. Schindelbeck and H. van Es. Organic management improves soil health: results from the Organic Grain Cropping Systems Experiment. What's Cropping Up 18(1):5-9.
Isaacs, K., B. Caldwell, and C. L. Mohler. 2008. Organic Ridge Till Vegetabl;es. Organic Farms, Folks & Foods, Spring 2008: 20-21.
Mohler, C. L. and V. Grubinger. Managing large crabgrass. Southern Tier Produce News December 2008:3-4.
Schonbeck, M. and C. Mohler. Manipulating weed seedbanks to promote their decline.View
2006Organic Crop Rotation Manuals and Spreadsheets. http://www.neon.cornell.edu/croprotation/index.htmlView
Organic Cropping Systems Project. Organic Agriculture for the Future: Designing Farms for Better Soil and Pest Management. www.organic.cornell.edu/ocs/html/index.View
2004Mohler, C. L. Understanding weed biology. In, Organic Vegetable Production, A. Seaman (ed.), pp. 59-75. Natural Resource, Agriculture, and Engineering Service (NRAES): Ithaca, NY.
2002Mohler, C. L. Ecological principles of sustainable organic systems: an ecologist
1997Mohler, C. L. and J. C. Frisch. Mechanical weed control in oats with a rotary hoe and tine weeder. Proceedings of the Northeastern Weed Science Society 51:2-6.
1996Mt. Pleasant, J., J. C. Frisch, C. L. Mohler and R. Burt. Cultivation basics for weed control in corn. Cornell Cooperative Extension Information Bulletin 241. 10 p.
D. P. Swaney, W. L. Kuo, D. A. Weinstein, C. Mohler, S. DeGloria, C. Pelkie, F-A. Tsai, T. S. Steenhuis, and C. E. McCulloch. Response of a watershed model to varying spatial landscape characteristics. pp 65-72, in, H. T. Mowrer; R. L. Czaplewski; R. H. Hamre (tech coords.), Spatial Accuracy Assessment in Natural Resources and Environmental Sciences: Second International Symposium. May 21-23, 1996. General Technical Report RM-GTR-277. Fort Collins, CO. U.S. Dept of Agriculture, Fo
1995Mohler, C. L. Controlling weeds in the crop row with cultivators: principles and practice. Proceedings of the 1995 New York State Vegetable Growers Conference, Feb. 14-16, 1995, Liverpool, NY. p. 112-115.
Mohler, C. L. A living mulch (white clover) / dead mulch (compost) weed control system for winter squash. Proceedings of the Northeastern Weed Science Society 49:5-10.
1992Teasdale, J. R. and C. L. Mohler. Weed suppression by residue from hairy vetch and rye cover crops. Proceedings of the First International Weed Congress 2:516-518.
1991Mohler, C. L. Plant community types of the central Finger Lakes Region of New York: a synopsis and key. The Proceedings of the Rochester Academy of Science, 17:55-107.
1986Mohler, C. L. and L. Mudrak. Terrestrial vegetation of the northeastern shore of Lake Erie. Technical Memorandum #1 - Vegetation: An evaluation of selected landscape forms for managing winds on coastal redevelopment sites. Landscape Architecture Program, Cornell University.
Mohler, C. L. A forest type classification for New York State based on U.S. Forest Service survey data. Ecosystems Research Center Report (ERC-069), Cornell University.
1979Mohler, C. L. An analysis of floodplain vegetation of the lower Neches drainage, Southeast Texas, with some considerations on the use of regression and correlation in plant synecology. Ph.D. Thesis, Ecology and Evolutionary Biology, Cornell University.

Book

2009Mohler, C. L. and S. E. Johnson, Eds. Crop Rotation on Organic Farms: A Planning Manual. Natural Resources, Agriculture and Economics Service (NRAES): Ithaca, NY. 156 p.
2006Mohler, C. L., P. L. Marks and S. Gardescu. A Guide to the Plant Communities of the Central Finger Lakes Region. New York State Agricultural Experiment Station: Geneva, NY. 127 p.
2001Liebman, M., C. L. Mohler and C. Staver. Ecological Management of Agricultural Weeds. Cambridge University Press, Cambridge. 532 pp.
Mohler, C. L. and A. DiTommaso. Managing Weeds on your Farm: A Guide to Ecological Strategies. Sustainable Agriculture Research and Education (SARE). In prep.

Presentation

Mechanical Weed Management (Narrated PowerPoint)View
Planning for Flexibility in Effective Crop Rotations (Narrated PowerPoint)View
The Ecology of Weed Management (Flash)View
The Ecology of Weed Management (PDF)View