Research Interests   Selected Publications
  Professional Background   Software for Sale
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Forrest W. Nutter, Jr.
Associate Professor
Department of Plant Pathology
Iowa State University
Ames, IA 50010
Phone: (515)294-8737


fwn@iastate.edu

Research Interests

Dr. Nutter's research interests are in quantitative epidemiology and plant disease management using a system approach to optimize and integrate pest managemnet tactics; use of quantitative epidemiological principles to assess the risks and benefits of new agricultural biotechnologies. His research program focuses on understanding, quantifying and forecasting the occurrence of plant disease epidemics. Theoretical and practical approaches for quantifying spatial and temporal component processes are being developed and incorporated into computer models. These models will be used to develop larger agroecosystem models that will help optimize and integrate the epidemiological effects of new disease management strategies. Risks and benefits of new agricultural biotechnologies on plant disease epidemics are also being assessed.

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Selected Publications

Nutter, F. W., Jr., P. S. Teng, and M. H. Royer. 1993. Terms and concepts for yield, crop loss, and disease thresholds. Plant Dis. 77:211-215.

Parker, S. K., M. L. Gleason, and F. W. Nutter, Jr. 1995. Influence of rain events on spatial distribution of Septoria leaf spot of tomato. Plant Dis.79:148-152.

Nutter, F. W., Jr. 1995. Improving the accuracy and precision of disease assessments: selection of methods and use of computer-aided training programs. Can. J. Pl. Pathol. 16:(in press)

Nutter, F. W., Jr, 1992. Quantification of components contributing to rate-reducing resistance in a plant-virus pathosystem. Pages 299-310 in: System Approaches to Agricultural Development, ed. F. W. T. Penning De Vries, et al. Kluwer Acad. Press, The Netherlands.

Martinson, C.A., Wegulo, S.N., Mauricio, J., Rivera, C., and Nutter, F. W., Jr. 1994. Fungicidal spray program for seed corn production. Pages 71-79 in: D. wilkinson. Proc. 49th Annual Corn & Sorghum Research Conf. Dec 7-8, 1994, Chicago, IL. Amer. Seed Trade Assn., Wash. D. C.

Nutter F. W., Jr., and Gaunt, R.E. 1996. Recent developments in methods for assessing disease losses in forage/pasture crops. Pages 93-118 in: S. Chakraborty, D.T. Leath, R.A. Skipp, G.A. Pederson, R.A. Bray, G.C.M. Latch, and F. W. Nutter, Jr. (eds.) Pasture and Forage Crop Plathology. American Soc. Agronomy, Crop Sci. Soc. America and Soil Sci. Soc. America, Madison, WI.

Teng, P.S., Heong, K. L., Kropff, M. J., Nutter, F. W. Jr., and Sutherst, R.W. 1996. Linked pest-crop models under global change. Pages 291-316 in: Global Change and Terrestrial Ecosystems, B. walker and W. Steffens, eds. Cambridge University Press, Cambridge, U.K.

Nutter, F. W., Jr. and Parker, S. P. 1997. Fitting disease progress curves using EPIMODEL. Pages 24-28 in: Exercises in Plant Disease Epidemiology, L. Francl and D. Neher, eds. APS Press, St. Paul, MN

Nutter, F. W.,Jr. 1997. Disease severity assessment training. Pages 1-7 in: Plant Disease Epidemiology, L. Francl and D. Neher, eds. APS Press, St. Paul, MN.

Refereed Journal Articles (last 5 years):

Nutter, F. W., Jr., Teng, P.S., and Royer, M.H. 1993. Terms and concepts for yield, crop loss, and disease thresholds. Plant Disease 77: 211-215.

Nutter, F. W., Jr., Gleason, M.L., Jenco, J. H., and Christians, N. L. 1993. Accuracy, intra-rater repeatability, and inter-rater reliability of disease assessment systems. Phytopathology 83: 806-812.

Guilebrau, L. P., All, J. N., Nutter, F.W. Jr., and Kuhn, C. W. 1993. Comparison of foliar and soildrench applications of rubidium chloride solutions to plants for marking feeding aphids (homopera: aphidae). J. Entomol. Sci. 28: 370-375

Labrinos, J. L., and Nutter, F. W., Jr. 1993. Comparative effects of a protectant versus a sterile inhibiting fungicide on disease components of late leafspot of peanut. Plant Dis. 77: 837-845.

Rizvi, S. S. A., and Nutter, F. W., Jr. 1993. Population dynamics of alfalfa foliar pathogens in Iowa. Plant Dis. 77: 1126-1135

Alderman, S. C., and Nutter, F. W., Jr. 1994. Effect of temperature and relative humidity on development of Cercosporidium Personatum on peanut in Georgia. Plant Dis. 78: 74-78.

Aquino, V. M., Shokes, F. M., Gorbet, D. W., and Nutter, F. W. Jr. 1995. Late leafspot disease progression on peanuts as affected by components of partial resistance. Plant Dis. 79: 74-78.

Madden, L. V., and Nutter, F. W., Jr. 1995. Modeling crop losses at the field scale. Can. J. Plant Pathol. 17: 124-137.

Nutter, F. W., Jr. 1995. Improving the accuracy and precision of disease assessments: selection of methods and use of computer-aided training programs. Can. J. of Pl. Pathology 17: 174-185.

Park, S. K., Gleason, M. L., and Nutter F. W., Jr. 1995. Dissemination of Septoria lycopersici spores during rain events. Plant Disease 79: 148-152.

Alberts, E.V., Nutter F. W., Jr., Corbett, A. J., and Graetz, D.K. 1996. First report of alfalfa mosaic virus in lupins in Australia. Plant Disease 80: 1302.

Nutter, F. W., Jr. and Littrell, R. H. 1996. Relationships among defoliation, canopy reflectance, and pod yield in the peanut-late leafspot pathosystem. Corp Protection 15: 135-142.

Webb, D.H., Nutter, F. W., Jr., and Buxton, D. R. 1996. Risk assessment of reducing leaf lignin content on components of resistance to alfalfa rust. Plant Disease. 80: 1184-1188

Epstein, A.H., Hill, J. H., and Nutter, F. W., Jr. 1997. An evaluation of the augmentation of rose rosette disease for the biological control of multiflora rose. Weed Sci. 45: 172-178.

Habili, N., and Nutter, F. W., Jr. 1997. Temporal and spatial analysis of grapevine leafroll-associated virus 3 in Pinot Noir grapevines in Australia. Plant Disease 81: 624-628.

Parker, S. K., Nutter, F. W., Jr., and Gleason, M. L. 1997. Temporal and spatial spread of Septoria leafspot of tomato. Plant Disease 81: 272-276.

Nutter, F. W., Jr. 1997. Quantifying the temporal dynamics of plant viruses: a review. Crop Prot. 16: 603-618

Webb, D. H., and Nutter, F. W., Jr. 1997. Effect of temperature and duration of leaf wetness on two disease components of alfalfa rust on alfalfa. Phytopathology 87: 946-950.

Wegulo, S. N., Nutter, F. W., Jr., and Martinson, C.A. 1997. Risks and benefits assessment of fungicide usage on seed corn in Iowa. Plant Disease 81: 415-422.

Nutter, F. W., Jr., Schultz, P. M., and Hill, J.H. 1998. Use of strain specific monoclonal antibodies to quantify within-field temporal and spatial spread od soybean mosaic virus in soybean.

Wegulo, S. N., Martinson, C.A., and Nutter, F. W., Jr. 1998. Funicide usage to control common rust and other fungal disease in hybrid corn seed production in Iowa. Plant Disease 82: (acepted for publication).

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Software for Sale

 

Disease.Pro Program

Disease.Pro is a computerized disease assessment training program designed o help people working in the agricultureal sciences improve their ability to estimate disease proportion.

The program simulates four foliar diseases of peanut: peanut rust, early leaf spot, late leaf spot, and mixed leaf spots. You, the user, will be asked to select the number of peanut leaves that you wish to evluate ( 1 to 50 ), the size of lesions that will appear on a simulated peanut leaf ( small, medium, large, or random mixture ), and whether or not you want the actual disease proportion displayed after you have keyed in your estimate of the disease proportion ( immediate feedback ).

Finally, the progam allows you to evaluate your rating performance by (1) producing a graph of the error of estimated disease proportions versus the actual proportions as calaulated by the program, (2) producing a table and score report of these data, (3) producing a graph of the estimated severity versus the actual severity as well as calaulating and displaying the linear regression line and equation, and (4) outputting the data to a file or inputting data from a file.

Barley.Pro Program

Barley.Pro is a computerized disease assessment training program designed to help people working in the agricultureal sciences improve their ability to estimate disease proportion.

The program simulates four foliar diseases of barley: barley rust, spot blotch, and scald. You, the user, will be asked to select the number of barley leaves that you wish to evaluate ( 1 to 50 ), the size of lesions that will appear on a simulated barley leaf ( small, medium, large, or random mixture ), and whether or not you want the actual disease proportion displayed after you have keyed in your estimate of the disease proportion ( immediate feedback ).

Finally, the progam allows you to evaluate your rating performance by (1) producing a graph of the error of estimated disease proportions versus the actual proportions as

calaulated by the program, (2) producing a table and score report of these data, (3) producing a graph of the estimated severity versus the actual severity as well as calaulating and displaying the linear regression line and equation, and (4) outputting the data to a file or inputting data from a file.

Alfalfa.Pro Program

Alfalfa.Pro is a computerized disease assessment training program designed to help people working in the agricultureal sciences improve their ability to estimate disease proportion.

Alfalfa.Pro is a computerized disease assessment training program designed to help people working in the agricultureal sciences improve their ability to estimate disease proportion.

The program simulates five foliar diseases of Alfalfa: alfalfa rust, spring black stem and leaf spot, summer black stem and leaf spot, stemphylium leaf spot, and bacterial leaf spot. You, the user, will be asked to select the number of alfalfa leaves that you wish to evaluate ( 1 to 50 ), the size of lesions that will appear on a simulated alfalfa leaf ( small, medium, large, or random mixture ), and whether or not you want the actual disease proportion displayed after you have keyed in your estimate of the disease proportion ( immediate feedback ).

Finally, the progam allows you to evaluate your rating performance by (1) producing a graph of the error of estimated disease proportions versus the actual proportions as calaulated by the program, (2) producing a table and score report of these data, (3) producing a graph of the estimated severity versus the actual severity as well as calaulating and displaying the linear regression line and equation, and (4) outputting the data to a file or inputting data from a file.

 

Corn.Pro Program

Corn.Pro is a computerized disease assessment training program designed to help people working in the agricultureal sciences improve their ability to estimate disease proportion.

The program simulates nine foliar diseases of corn: common rust, southern rust, northern leaf blight, northern leaf spot, southern leaf blight(race O), gray leaf spot, eyespot, and Stewart's disease.You, the user, will be asked to select the number of corn leaves that you wish to evaluate ( 1 to 50 ), whether or not you want the actual disease proportion displayed after you have keyed in your estimate of the disease proportion ( immediate feedback ), the range of disease severity, and the lesion size(when applicable).

Finally, the progam allows you to evaluate your rating performance by (1) producing a graph of the error of estimated disease proportions versus the actual proportions as calaulated by the program, (2) producing a table and score report of these data, (3) producing a graph of the estimated severity versus the actual severity as well as calaulating and displaying the linear regression line and equation, and (4) outputting the data to a file or inputting data from a file.

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