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Hoch, Harvey Charles
Cornell Emeritus Professor
Cornell Faculty Member
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Positions
- Professor, Plant Pathology at Geneva - 2012
My program investigates the cell biology of plant pathogens, especially of fungal and bacterial pathogens.
Research Areas
- cell biology
- disease control
- molecular biology
- nanobiotechnology
- nanotechnology
- new life sciences
- pathogens
- pest management
- plant biology
- plant pathology
- viticulture
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Affiliations
member of graduate field
other Cornell affiliations
Research
research overview
- Over the years my research program has emphasized various aspects of fungal cell biology, especially of fungi that cause plant diseases. These studies have been directed at investigations into the mechanisms by which fungi use leaf surface characteristics to sense the right time and place to infect their host. Toward this, micro- and nanotechnology has been used to fabricate devices, and surfaces that mimic plant features, to interrogate fungal cell function. Highlighted discoveries of our studies are that: the bean rust pathogen, Uromyces appendiculatus, uses topographical leaf surface features to guide the pathogen to plant stomata (pores) where it then senses a 0.4 to 0.8 micrometer high topographical features which triggers it to develop specialized infection structures needed to enter the host plant; Colletotrichum graminicola, the incitant of anthranose disease of grasses, require at least 4 micrometers of surface area to develop similar infection structures. More recent research activities involve studying colonization of grape xylem elements by the pathogenic bacterium, Xylella fastidiosa, the causal agent of Pierce's Disease of grape, as well as other bacterial pathogens, e.g., Clavibacter michiganesis, Xanthomonas campestris, and Agrobacterium vitis of various crop plants. Because the xylem vessel environment within a living plant can not be readily viewed, similar fabrication technologies were used to create microfluidic chambers that mimic plant xylem vessels where the bacteria can be studied temporally and spatially. We have demonstrated that the bacteria move against the flow of xylem sap through the extension and retraction of hair-like type IV pili, and that they develop large aggregates of cells within biofilms.
research activities
principal investigator on
co-principal investigator on
- DEVELOPMENT, IMPLEMENTATION, AND OUTREACH FOR EMERGING TECHNOLOGIES OF PLANT PATHOGEN DETECTION awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2009 - 2012
- EXPLOITING A CHEMOSENSORY SIGNAL TRANSDUCTION SYSTEM THAT CONTROLS TWITCHING MOTILITY AND VIRULENCE IN XYLELLA FASTIDIOSA awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2010 - 2013
area(s) of concentration/expertise
keywords
- Bacterial Cell Biology
- Fungal Cell Biology
- Mycology
- Nanobiotechnology
- Plant Pathology
submitted impact statement
Publications
individual publications
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academic article
- Identification of an Operon, Pil-Chp, that Controls Twitching Motility and Virulence in Xylella fastidiosa. Molecular Plant Microbe Interactions. 24:1198-1206. 2011
- Dispersal and Movement Mechanisms of Phytophthora capsici Sporangia. Phytopathology. 99:1258-1264. 2009
- Diversity of Ampeloviruses in mealybug and soft scale vectors and in grapevine hosts from leafroll-affected vineyards. Phytopathology. 99:1177-1184. 2009
- Grapevine xylem sap enhances biofilm development by Xylella fastidiosa. FEMS Microbiol. Letters. 295:129-134. 2009
- Surface motility and associated surfactant production in Agrobacterium vitis. Letters of Applied Microbiology. 49:596-601. 2009
- Surface motility and associated surfactant production on Agrobacterium vitis.. Letters in Applied Microbiology. 49:569-601. 2009
- Survey for the three major leafroll disease-associated viruses in Finger Lakes vineyards in New York. Plant Disease. 93:395-401. 2009
- Twitching motility and biofim formation are associated with tonB1 in Xylella fastidiosa. FEMS Microbiol Letters. 299:193-199. 2009
- Autoaggregation of Xylella fastidiosa Cells Is Influenced by Type I and Type IV Pili. Applied and Environmental Microbiology. 74:5579-5582. 2008
- Life on the leaf: How bacteria survive during vegetable production. Phytopathology. 98. 2008
- Assessing adhesion forces of type I and type IV pili of Xylella fastidiosa bacteria using a microfluidic flow chamber. Applied and Environmental Microbiology. 73. 2007
- Mutations in type I and type IV pilus biosynthetic genes affect twitching motility rates in Xylella fastidiosa. Journal of Bacteriology. 189. 2007
- Twitching motility among pathogenic Xylella fastidiosa isolates and the influence of bovine serum albumin on twitching-dependent colony fringe morphology. FEMS Microbiology Letters. 268. 2007
- Type I and type IV pili of Xylella fastidiosa affect twitching motility, biofilm formation, and cell-cell aggregation. Microbiology. 153:719-726. 2007
- Xylella fastidiosa movement and biofilm formation studied in artificial xylem vessels. Phytopathology. 97. 2007
- Comparison of xylem colonization by Clavibacter michiganensis subsp. michiganensis and Agrobacterium vitis using microfluidics. Phytopathology. 96. 2006
- Generality of the prerequisite of conidium attachment to a substratum as a signal for germination among Phyllosticta species. Mycological Research. 98. 2006
- Two new fluorescent dyes applicable for visualization of fungal cell walls. Mycological Research. 97:580-588. 2005
- Upstream migration of Xylella fastidiosa via pilus-driven twitching motility. Journal of Bacteriology. 187:5560-5567. 2005
- Quantification of substratum contact required for initiation of Colletotrichum graminicola appressoria. Fungal Genetics and Biology. 41:1-12. 2004
- Microfabricated plastic devices from silicon using soft intermediates. Biomedical Microdevices. 4:277-283. 2002
- Expression of recombinant aequorin as an intracellular calcium reporter in the phytopathogenic fungus, Phyllosticta ampelicida. Fungal Genetics and Biology. 34. 2001
- Ca2+ Regulation of Phyllosticta ampelicida Pycnidiospore Germination and Appressorium Formation. Fungal Genetics and Biology. 31. 2000
- Identification and localization of calcium-dependent protease II in Neurospora crassa and Uromyces appendiculatus. Protoplasma. 210:85-91. 2000
- Comparative imaging of total ion-species distribution in urediospore germlings of Uromyces using ion microscopy. Fungal Genetics and Biology. 27:77-87. 1999
- The pycnidiospore of Phyllosticta ampelicida: surface properties involved in substratum attachment and germination. Mycological Research. 103:915-924. 1999
- Germination and appressorium development of Phyllosticta ampelicida pycnidiospores. Mycologia. 90:258-268. 1998
- Influence of irradiation in cell wall structure of stored apples. Scanning. 20. 1998
- Microinjected antisense INF24 oligonucleotides inhibit appressorium development in Uromyces. Mycological Research. 102:1513-1518. 1998
- Germination of Phyllosticta ampelicida pycnidiospores: prerequisite of adhesion to the substratum and the relationship of substratum wettability. Fungal Genetics and Biology. 20:18-29. 1996
- Inhibition of thigmostimulated cell differentiation with RGD-peptides in Uromyces germlings. Protoplasma. 194:91-102. 1996
- The parasitic relationship between Phyllosticta ampelicida and Vitis vinifera. Mycologia. 88:629-634. 1996
- Identification of thigmoresponsive loci for cell differentiation in Uromyces germlings. Protoplasma. 186:34-40. 1995
- Superoxide dismutase: a differentiation protein expressed in Uromyces germlings during early appressorium development. Experimental Mycology. 19:284-296. 1995
- Visualization of the extracellular matrix surrounding pycnidiospores, germlings, and appressoria of Phyllosticta ampelicida. Mycologia. 87:759-771. 1995
- Fractionation of extracellular matrix components from urediospore germlings of Uromyces. Mycologia. 86:787-794. 1994
- Deformation of stomatal guard cell lips and microfabricated artificial topographies during appressorium formation by Uromyces. Experimental Mycology. 17:70-78. 1993
- Fluorescence Confocal Microscopy: Applications in Fungal Cytology. Mycologia. 85:721-733. 1993
- Microinjection of urediospore germlings of Uromyces appendiculatus. Experimental Mycology. 17:241-252. 1993
- Substrate Hydrophobicity and Adhesion of Uromyces Urediospores and Germlings. Experimental Mycology. 17:253-273. 1993
- The autogenic extracellular environment of Uromyces appendiculatus urediospore germlings. Mycologia. 85:392-400. 1993
- Measuring mechanosensitive channels in Uromyces: Response. Technical comment. Science. 256:1335-1336. 1992
- A mechano-sensitive cation channel in the plasma membrane of the topography sensing fungus, Uromyces. Science. 253:1415-1417. 1991
- Appressorium formation in response to topographical signals by 27 rust species. Phytopathology. 81:323-331. 1991
- Cytoskeletal organization in Uromyces urediospore germling apices during appressorium formation. Protoplasma. 165:37-50. 1991
- Initiation of appressorium formation in Uromyces appendiculatus: Organization of the apex, and the responses involving microtubules and apical vesicles. Canadian Journal of Botany. 69:2560-2573. 1991
- Morphology and ontogeny of stomata in Phaseolus vulgaris. Canadian Journal of Botany. 69:477-484. 1991
- Temporal and spatial dynamics of appressorium development in Uromyces appendiculatus. Experimental Mycology. 15:116-131. 1991
- The effect of pH and K+ on appressorium formation by Uromyces appendiculatus urediospore germlings. Experimental Mycology. 15:356-360. 1991
- Uniformity among races of Uromyces appendiculatus in response to topographic signaling for appressorium formation. Phytopathology. 81:883-887. 1991
- Isolation and purification of actin from the phytopathogenic filamentous fungus, Uromyces appendiculatus. European Journal of Cell Biology. 53:364-372. 1990
- Virus-like particles in hyphae and conidia of European hypovirulent (ds-RNA-containing) strains of Endothia (Cryphonectria) parasitica. Canadian Journal of Botany. 68:90-101. 1990
- Cyclic AMP, cyclic GMP and bean rust uredospore germlings. Experimental Mycology. 13:100-104. 1989
- Heat shock-induced development of infection structures by bean rust uredospore germlings. Experimental Mycology. 13:149-157. 1989
- The use of fluorochromes in the study of fungal cytology and differentiation. Topical Review. Experimental Mycology. 13:303-320. 1989
- Differential effects of sterol inhibitors on growth, cell membrane permeability and ultrastructure in two target fungi. Phytopathology. 78:1033-1042. 1988
- An intact microtubule cytoskeleton is necessary for mediation of the signal for cell differentiation in Uromyces. European Journal of Cell Biology. 45:209-218. 1987
- Association of the microtubule cytoskeleton with the thigmotropic signal for appressorium formation in Uromyces. Mycologia. 79:540-545. 1987
- Biochemical, immunological and immunocytochemical evidence for the association of chalcone synthase with the endoplasmic reticulum membranes. Proceedings of the National Academy of Sciences (PNAS). 84:8966-8970. 1987
- Cell-substratum adhesive protein involved in surface contact responses of the bean rust fungus. Physiological and Molecular Plant Pathology. 30:373-388. 1987
- Chemically induced appressoria in Uromyces appendiculatus are formed aerially, apart from the substrate. Mycologia. 79:418-424. 1987
- Infection structures-- form and function. Topical Review. Experimental Mycology. 11:163-169. 1987
- Isolation and characterization of coated vesicles from filamentous fungi. European Journal of Cell Biology. 43:189-194. 1987
- Purification of calmodulin from bean rust uredospores. Experimental Mycology. 11:231-235. 1987
- Signaling for growth orientation and cell differentiation by surface topography in Uromyces. Science. 235:1659-1662. 1987
- Structural and chemical changes among the rust fungi during appressorium formation. Annual Review of Phytopathology. 25:231-247. 1987
- Colonization of the rhizosphere by biological control agents applied to seeds. Phytopathology. 76:60-65. 1986
- Inhibition of cell differentiation in Uromyces with D2O and taxol. European Journal of Cell Biology. 41:290-297. 1986
- Purification and some properties of a virus associated with cardamom mosaic, a new member of the potyvirus group. Plant Disease. 70:65-69. 1986
- Thallophytic Allelopathy: Isolation and identification of laetisaric acid. Science. 232:105-106. 1986
- The involvement of F-actin in Uromyces cell differentiation: The effects of cytochalasin E and Phalloidin. Protoplasma. 135:88-101. 1986
- The relation of population densities of the antagonist, Laetisaria arvalis , to seedling diseases of table beet incited by Pythium ultimum. Canadian Journal of Microbiology. 32:156-159. 1986
- A foliar ringspot of Thunbergia alata caused by broad bean wilt virus. Plant Disease. 69:726. 1985
- Effect of potassium on sugar uptake and assimilation by bean rust germlings. Mycologia. 77:248-452. 1985
- Extracellular proteins associated with induction of differentiation in bean rust uredospore germlings. Phytopathology. 75:1073-1076. 1985
- Recognition of host morphology by rust fungi; responses and mechanisms. Canadian Journal of Plant Pathology. 7:314-322. 1985
- The development of infection structures by the rust and other fungi. Microbiol. Sci. 2:193-198. 1985
- The microtubule cytoskeleton in hyphae of Uromyces phaseoli germlings: Its relationship to the region of nucleation and to the F-actin cytoskeleton. Protoplasma. 124:112-122. 1985
- The relation of population densities of the antagonist, Laetisaria arvalis, to seedling diseases of table beet incited by Pythium ultimum. Canadian Journal of Microbiology. 32:156-159. 1985
- Biological control of Phoma root rot of table beet seedlings with Laetisaria arvalis. Phytopathology. 74:1094-1096. 1984
- Changes in Dna Content of Nuclei in Rust Uredospore Germlings During the Start of Differentiation. Experimental Mycology. 8:245-255. 1984
- Evidence that cyclic AMP initiates nuclear division and infection structure formation in the bean rust fungus, Uromyces phaseoli. Experimental Mycology. 8:37-46. 1984
- Influence of the antagonist Laetisaria arvalis on infection of table beets by Phoma betae. Phytopathology. 74:1094-1096. 1984
- Metabolic alterations in bean rust germlings during differentiation induced by potassium ion. Experimental Mycology. 8:183-192. 1984
- Contact with membrane grooves induces wheat stem rust uredospore germlings to differentiate appressoria but not vesicles. Phytopathology. 73:1436-1439. 1983
- Letter to the Editor: Terminology to describe the differentiation response by germling of fungal spores. Phytopathology. 73:380. 1983
- Population dynamics of Laetisaria arvalis and low-temperature Pythium spp. in untreated and pasteurized beet field soils. Phytopathology. 73:1445-1449. 1983
- Potassium ions induce rust fungi to develop infection structures. Experimental Mycology. 7:40-46. 1983
- The ultrastructure of Endothia parasitica: Comparison of a virulent with a hypovirulent isolate. Canadian Journal of Botany. 61:389-399. 1983
- Ultrastructural organization of the non-differentiated uredospore germling of Uromyces phaseoli. Mycologia. 75:795-824. 1983
- Visualization of actin in situ by rhodamine-conjugated phalloin in the fungus Uromyces phaseoli. European Journal of Cell Biology. 32:52-58. 1983
- A possible role for microtubules in the induction of nuclear division in bean rust uredospore germlings. Experimental Mycology. 6:293-302. 1982
- Distribution of secondary metabolites and their biosynthetic enzymes in pea (Pisum sativum L.) leaves. Plant Physiology. 70:745-748. 1982
- Conventional chemical fixations induce artifactual swelling of dolipore septa. Experimental Mycology. 5:167-172. 1981
- Laetisaria arvalis sp. nov. (Aphyllophoralis, Corticiaceae), a possible biological control agent for Rhizoctonia solani and Pythium species. Mycologia. 72:728-736. 1980
- Subepidermal air-spaces: Basis for the phenotypic expression of the Argenteum mutant of Pisum. American Journal of Botany. 67:905-911. 1980
- Ultrastructure of freeze-substituted hyphae of the Basidiomycete, Laetisaria arvalis. Protoplasma. 103:281-297. 1980
- Biological control of Pythium root rot of table beet with Corticium sp. Phytopathology. 69:417-419. 1979
- Cytochemical localization of N-acetyl-b-D-glucosaminidase in hyphae of Mucor racemosus. Experimental Mycology. 3:164-173. 1979
- Fungicidal control of Venturia inaequalis: An analysis of the chlorotic flecks resulting from fungicide application to infected Malus leaves. Phytopathology. 69:456-462. 1979
- Mycoparasitic relationships. V. Cytology of the Sphaerotheca fuliginea-Tilletiopsis sp. interaction. Phytopathology. 69:359-362. 1979
- Mycoparasitism of Pythium ultimum oospores by Fusarium merismoides. Mycologia. 71:621-625. 1979
- Mycoparasitism of oospores of Pythium ultimum by Fusarium merismoides. Mycologia. 71:621-625. 1979
- Penetration of chemicals into the Malus leaf cuticle: An ultrastructural analysis. Planta. 147:186-195. 1979
- Mycoparasitic relationships. IV. Stephanoma phaeospora parasitic on a species of Fusarium. Mycologia. 70:370-379. 1978
- Ultrastructural localization of bean common mosaic virus in dormant and germinating seeds of Phaseolus vulgaris. Phytopathology. 68:327-330. 1978
- Mycoparasitic relationships. I. Morphological features of interactions between Pythium acanthicum an several fungal hosts. Archives of Microbiology. 111:207-224. 1977
- Mycoparasitic relationships. III. Parasitism of Physalospora obtusa by Calcarisporium parasiticum. Canadian Journal of Botany. 55:198-207. 1977
- Mycoparasitic relationships: Gonatobotrys simplex parasitic on Alternaria tenuis. Phytopathology. 67:309-314. 1977
- Tomato leaf roll caused by the interaction of the wilty gene and tobacco mosaic virus infection. Plant Dis. Reptr. 61:500-502. 1977
- Use of permanganate of increase the electron opacity of fungal walls. Mycologia. 69:1209-2113. 1977
- Sterigmata and basidiospore development in Poria latemarginata. Mem. N.Y. Botanical Gardens. 28:98-104. 1976
- Further observations on the mechanisms involved in primary asexual spore cleavage in Aphanomyces euteiches. Canadian Journal of Botany. 53:1085-1091. 1975
- Microbodies and glyoxylate-cycle enzyme activities in filamentous fungi. Planta. 124:109-123. 1975
- Role of Pythium spp. as incitants of bean root and hypocotyl rot in Wisconsin. Plant Dis. Reptr. 58:443-447. 1975
- Ultrastructural alterations observed in isolated apple leaf cuticles. Canadian Journal of Botany. 53:2006-2013. 1975
- Preparation of fungal hyphae grown on agar-coated microscope slides for electron microscopy. Stain Technology. 49:318-320. 1974
- Proteinaceous hexagonal inclusions in hyphae of Whetzelinia sclerotiorum and Neurospora crassa. Canadian Journal of Microbiology. 20:1029-1035. 1974
- Studies on chemical control of bean root and hypocotyl rot in Wisconsin. Plant Dis. Reptr. 58:941-944. 1974
- Studies on nuclear division in basidia of Poria latemarginata. Canadian Journal of Botany. 52:2323-2333. 1974
- The effects of osmotic water potentials on Aphanomyces euteiches during zoosporogenesis. Canadian Journal of Botany. 51:413-420. 1973
- A continuous flow system for inducing and observing asexual spore formation in Aphanomyces euteiches. Canadian Journal of Botany. 50:681-682. 1972
- The ultrastructure of Aphanomyces euteiches during asexual spore formation. Phytopathology. 62:149-160. 1972
- The ultrastructure of zoospores of Aphanomyces euteiches and of their encystment and subsequent germination. Protoplasma. 75:113-138. 1972
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article
-
chapter
- Ions Regulate Spore Attachment, Germination, and Fungal Growth. The Mycota, Biology of the Fungal Cell. 219-236. 2007
- Ions as Regulators of Growth and Development. The Mycota, Volume VIII: Biology of the Fungal Cell. 73-89. 2001
- Physical and chemical clues for spore germination and appressorial formation by fungal pathogens. The Mycota, Volume V: Plant Relationships, Part A. 27-40. 1997
- Microfabricated surfaces in signaling for cell growth and differentiation in fungi. Nanofabrication and Biosystems: Integrating Materials Science, Engineering, and Biology. 1995
- Leaf surface features and the epiphytic growth of fungi. Microbial Ecology of Leaves. 1991
- Signaling for infection structure formation in fungi. The Fungal Spore and Disease Initiation in Plants and Animals. 1991
- Preservation of Cell Ultrastructure by Freeze-substitution. Electron Microscopy Applied to Plant Pathology. 1990
- Preinfection changes in germlings of a rust fungus induced by host contact. Biotechnology for Crop Protection. 82-93. 1988
- Freeze-substitution: A technique that yields improved ultrastructural presentation of fungi. Zoosporic fungi in Teaching and Research. 1987
- Pythium acanthicum - A mycoparasite. Zoosporic fungi in Teaching and Research. 96-97. 1987
- Freeze-substitution in fungi. Electron Microscopy of Microorganisms. 1986
- Gene expression during infection structure development by germlings of the rust fungus. Biology and Molecular Biology of Plant-Pathogen Interactions. 331-341. 1986
- Biological control of soilborne pathogens with antagonists. Biological Control and Integrated Pest Management Systems. 1985
- A sensing mechanism in rust uredospore germlings responsive to host morphology starts the cell cycle. Infection Processes in Fungi. 1984
- Pythium acanthicum - A mycoparasite. Lower Fungi in the Laboratory. 1978
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conference paper
- Survey for the three major leafroll disease-associated viruses in finger lakes vineyards in New York. Proceedings of the 2nd Annual National Viticulture Research Conference. 2008
- Increasing abundance and effectiveness. Proc. Natl. Interdisciplinary Biol. Control Conference, Feb. 15-17. 1983
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document part
- Dispersal and movement mechanisms of Phytophthora capsici sporangia 2009
- Distribution and diversity of leafroll-associated ampeloviruses in viruliferous vectors and grapevine hosts 2009
- Pathogenic development of Phytophthora capsici on cucumber fruits 2009
- Comparison of methods to isolate and enumerate Laetisaria arvalis from soil. 1344-1345. 1983
- Importance of Pythium ultimum, Rhizoctonia solani, and Phoma betae in the etiology of diseases of table beet seedlings. 1344. 1983
- Effect of Laetisaria arvalis on population dynamics of Pythium ultimum in pasteurized and natural field soil. 1010. 1982
featured in archived article
Teaching
teaching activities
- PLPA-8900: Master's Level Thesis Research - Spring 2013
- PLPA-9900: Doctoral-Level Thesis Research - Spring 2013
- PLPA-8900: Master's Level Thesis Research - Spring 2012
- PLPA-9900: Doctoral-Level Thesis Research - Spring 2012
- PLPA-7990: Graduate-Level Thesis Research - Fall 2011
- PLPA-8900: Master's-Level Thesis Research - Fall 2011
- PLPA-9900: Doctoral-Level Thesis Research - Fall 2011
Service
service to the profession
- Applied Research and Extension Program Council on Agriculture and Food Systems, Cornell University Member 2005 - 2010
- BioCurrents Research Center (NIH:NCRR), Marine Biological Laboratory Board of Advisors 2005 - 2009
- Nanotechnology Technical Advisory Group (TAG) to the President's Council of Advisors on Science and Technology (PCAST) for the National Nanotechnology Initiative (NNI) Committee Member 2003 - 2008
- Advisory Board, BioCurrents Research Center (NIH:NCRR), Marine Biological Laboratory Chairperson - 2006
- Cell Biology/Physiology, Mycological Society of America Councilor 2002 - 2005
- Mycological Society of America Councilor, Cell Biology/Physiology 2002 - 2005
- International Fungal Spore Meeting Committee Member 1998 - 2004
- Organizing committee International Fungal Spore Meeting Committee Member 1998 - 2004
- NIH Site visit team and Chairperson (Woods Hole, MA). The Biocurrents Research Center, an NCRR Research Resource Chairperson 2004
- Phylloplane Committee of American Phytopathological Society Committee Member 1998 - 2003
- Western Regional Project (W-147) Committee Member 1978 - 2003
- Organizing Committee for VIIIth International Fungal Spore Conference, August, 2002, Mexico Committee Member 1999 - 2002
- Committee on Phytopathology, Mycological Society of America Committee Member 1996 - 2000
- Organizing Committee for VIIth International Fungal Spore Conference, August, 1999, Groningen, Netherlands Committee Member 1998 - 1999
- Phylloplane Committee of American Phytopathological Society Vice-Chair 1998 - 1999
- NIH sponsored National Vibrating Probe Facility, Marine Biology Laboratory, Woods Hole Chairperson 1994 - 1996
- Cell Biology/Physiology, Mycological Society of America Councilor 1992 - 1996
- NIH sponsored National Vibrating Probe Facility, Marine Biology Laboratory, Woods Hole Board of Advisors 1992 - 1996
- Committee on Phytopathology, Mycological Society of America Chairperson - 1996
- Phylloplane Committee of American Phytopathological Society Chairperson - 1996
- American Phytopathological Society representative to the Biological Stain Commission Representative 1986 - 1995
- Biochemistry, Physiology, and Molecular Biology Committee, American Phytopathological Society Committee Member 1986 - 1992
- Collections and Germ Plasm Committee, American Phytopathological Society Committee Member 1989 - 1991
- Mycology Committee, American Phytopathological Society Committee Member 1984 - 1988
- Mycological Society of America representative to the Biological Stain Commission Representative 1981 - 1987
- Steering Committee, Eastern Research Conference on the Ecology of Root- infecting Microorganisms Committee Member 1978 - 1984
- Biological Control Committee of the Intersociety Consortium for Plant Protection (APS representative) Committee Member 1980 - 1983
- Biological Control Committee, American Phytopathological Society Committee Member 1975 - 1981
- Biological Control Committee, American Phytopathological Society Chairperson 1975 - 1981
- Plant Disease Management Coordinating Committee of American Phytopathological Society Committee Member 1978 - 1980
- Western Regional Project (W-147) Officer, Secretary - 1979
reviewer or editor for
Background
education and training
- Ph.D. in Plant Pathology, University of Wisconsin 1972
- M.S. in Plant Pathology, Colorado State University 1967
- B.S. in Botany, Colorado State University 1965
awards and honors
- Distinguished Mycologist Award, 2006
- Fellow, 2002
- Ruth Allen Award, 1994
Other
college
- CALS
research keyword
- Bacterial Cell Biology
- Fungal Cell Biology
- Mycology
- Nanobiotechnology
- Plant Pathology