TOPICS
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Name: Berggren, Jr., Gerard T.
Title: Professor
E-mail: 
Department: Plant Pathology and Crop Physiology Department
Organization: LSU AgCenter
Address 1: 302 Life Sciences
Address 2: Baton Rouge, LA 70803
Phone Number: (225) 578-1366
Fax Number:
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Education/Training
Ph.D. in Plant Pathology, 1974
Louisiana State University, Baton Rouge, Louisiana
Dissertation: Berggren, Jr., G. T. 1974. Studies on chemical control of cotton boll rot.
M.S. in Plant Pathology, 1971
Louisiana State University, Baton Rouge, Louisiana
Thesis: Berggren, Jr. G. T. 1971. Uptake location and relative amount of 14C-labeled Vitavax in cotton seedlings resulting from a Vitavax soil drench.
B.S. in Biology Education, 1969
Southeastern Louisiana University, Hammond, Louisiana |
Areas of Specialization/Research
Administrative. Department Head and Professor of Plant Pathology and Crop Physiology, and Accountable Property Officer for Federal Surplus Excess Property Program.
Research interests: Plant Disease Management and Control. |
Professional Experience
Research Contribution:
First identified Southern soybean stem canker in Louisiana, along with N. L. Horn, H. K. Whitam, and J. P. Snow.
Through collaborative efforts with other scientists (J. P. Snow, H. K. Whitam, and B. G. Harville) identified soybean cultivars most resistant to southern stem canker.
Identified soybean cultivars most resistant to red crown rot (in collaboration with D. K. Berner, B. G. Harville, and J. P. Snow).
With J. P. Snow and B. Lalitha, (Graduate Assistant) identified a toxin produced by the stem canker fungus.
Results of fungicides screening research demonstrated the utilization of single application of materials for control of foliar, pod and stem diseases, and the control of soybean aerial blight. This contributed significantly to the labeling of two materials for the management of diseases.
Teaching Experience:
Diseases of Agronomic Crops
Integrated Pest Management
Introductory Plant Pathology
Plant Disease Diagnosis and Control
Seminar - Graduate Seminar in Plant Pathology
Miscellaneous Professional Activities:
Business Manager for the APS publication Fungicide and
Nematicide Tests, 1986-1999
President, Southern Soybean Disease Workers, 1986-1987
Member of the American Phytopathological Society
New Fungicide and Nematicide Data Committee, 1984-1987
Editorial Board, Louisiana Agriculture, 1984-1986
Chairman, Southern Regional Information Exchange Group
(Soybean IPM), 1984-1985
President, Louisiana Association of Plant Pathologists and
Nematologists, 1984-1985
Vice President, Southern Soybean Disease Workers, 1984-1985
Vice President, Louisiana Association of Plant Pathologists and
Nematologists, 1983-1984
Member Louisiana Seed Commission - soybean stem canker
committee, 1983-1984
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Awards/Grants
Distinguished Alumnus, Southeastern Louisiana University, College of
Arts and Sciences (2003)
Distinguished Service Award for Faculty Excellence in Classroom
Teaching and Graduate Advising (1986)
Department Head's Award for Faculty Excellence (1985, 1986)
Department Head's Award for Outstanding Faculty Member (1985)
Distinguished Service Award for Fungicide and Nematicide Tests
(1992, 1999)
Professional Society Memberships:
American Phytopathological Society
Louisiana Association of Plant Pathologists and Nematologists
(Louisiana Plant Protection Association) |
Publications/Presentations/Patents
Refereed Journal Articles
Black, B. D., G. B. Padgett, J. S. Russin, J. L. Griffin, J. P. Snow, and G. T. Berggren. 1996. Potential weed hosts for Diaporthe phaseolorum var. caulivora the causal agent for soybean stem canker. Plant Disease 80:763-765.
Kousik, C. S., J. P. Snow, G. T. Berggren, and B. G. Harville. 1995. Effect of temperature on virulence of Rhizoctonia solani on soybean leaves and seedlings. Plant Pathology 44:580-586.
Kousik, C. S., J. P. Snow, and G. T. Berggren. 1994. Factors affecting infection cushion development by Rhizoctonia solani Ag-IA and IB on soybean leaves. Plant Pathology 43:237-244.
Padgett, G. B., J. S. Russin, J. P. Snow, D. J. Boethel, and G. T. Berggren. 1994. Interactions among the soybean looper (Lepidoptera: Noctuidte), three cornered alfalfa hopper (Homoptera: Membracidae), stem canker, and red crown rot in soybean. Journal Entomology Science, pp. 110-119.
Subbarao, K. V., J. P. Snow, G. T. Berggren, J. P. Damicone, and G. B. Padgett. 1992. Analysis of Stem Canker Epidemics in irrigated and non-irrigated conditions on differentially susceptible soybean cultivars. Phytopathology 82:1251-1256.
Berner, D. K., G. T. Berggren, and J. P. Snow. 1991. Effects of Glyphosate on Calonectria crotalariae and Red Crown Rot in Soybean. Plant Disease 75:809-813.
Yang, X. B., J. P. Snow, and G. T. Berggren. 1991. Patterns of Rhizoctonia Foliar Blight on Soybean and Effect of Aggregation on Disease Development. Phytopathology 81:287-293.
Damicone, J. P., J. P. Snow, and G. T. Berggren. 1990. Spatial and temporal spread of soybean stem canker from an inoculum point source. Phytopathology 80:571-578.
Joye, G. F., G. T. Berggren, and K. K. Berner. 1990. Effects of row spacing and within-row plant population on Rhizoctonia aerial blight of soybean and soybean yield. Plant Disease 74:158-160.
Russin, J. S., M. B. Layton, D. J. Boethel, E. C. McGawley, J. P. Snow, and G. T. Berggren. 1990. Growth, nodule development and N2-Fixing ability in Soybean damaged by an insect-fungus-nematode pest complex. Journal of Economic Entomology 83(1):247-254.
Subbarao, K. V., G. T. Berggren, and J. P. Snow. 1990. Characterization of leaf rust epidemics in Louisiana. Phytopathology 80:402-410.
Book and Book Chapter Contributions
Snow, J. P., and G. T. Berggren. 1992. Disease Management in Soybean: Use of Chemical Control and Application Technology. pp. 224-231 in: Pest Management in Soybean. L. G. Copping, M. B. Green, and R. T. Ress, editors. Elsevier Applied Science, London.
Berggren, G. T. 1989. Root and Lower Stem Diseases and Aerial Blight. pp. 6-10, 17 in: Soybean Disease Atlas 2nd edition. P. D. Coyler, ed. L. S. U. Agricultural Center and The Southern Soybean Disease Workers.
Berggren, Jr., G. T., and J. P. Snow. 1989. Rhizoctonia aerial blight. pp. 23-24 in: Compendium of Soybean Diseases 3rd edition. J. B. Sinclair and P. A. Backman, eds. The American Phytopathological Soc., St. Paul, MN.
Berggren, Jr., G. T., and J. P. Snow. 1989. Red Crown Rot. pp. 44 in: Compendium of Soybean Diseases 3rd edition. J. B. Sinclair and P. A. Backman, eds. The American Phytopathological Soc., St. Paul, MN.
Snow, J. P., and G. T. Berggren, Jr. 1989. Target Spot. pp. 27-28 in: Compendium of Soybean Diseases 3rd edition. J. B. Sinclair and P. A. Backman, eds. The American Phytopathological Soc., St. Paul, MN.
Semi-Technical Articles
Simoneaux, W. D., G. T. Berggren, Jr., T. Clark, R. Chaney, M. M. Eichhorn, D. Redfearn, and B. C. Venuto. 1997. Forage Production of Bermudagrass Varieties on Mississippi Delta Soils. Louisiana Cattleman, pp. 14-16.
Simoneaux, W. D., G. T. Berggren, Jr., T. P. Clark, C. R. Chaney, B. C. Venuto, M. M. Eichhorn, Jr., and D. Redfearn. 1997. Bermudagrass varieties show promise for hay production on Mississippi delta soils. Louisiana Agriculture 40(2):14. |
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