| 1909 | Detected first-known American case of industry-threatening bubbles disease of mushrooms |
| 1910 | Discovered first-known Importation of dangerous potato wart disease in America |
| 1925 | Revealed major newly recognized group of plant pathogens as represented by citrus-scab fungus |
| 1926 | Characterized all known pathogens and diseases of Hevea rubber trees in South America |
| 1927 | Established fundamental significance of Neurospora to development of modern research in fungal genetics |
| 1931 | Developed comprehensive taxonomic key to all known genera of fungi in English |
| 1941 | Completed research on entomogenous fungi with checklist of fungal pathogens in insects in America |
| 1950 | Monographed Balansia, a genus of fungi causing sterility in grasses |
| 1954 | Organized definitive system for use in specialized hyphal morphology for classifying wood-decay fungi |
| 1955 | Monographed Stereum, an important genus of wood-decay and tree-disease fungi |
| 1975 | Documented all known fungi of Puerto Rico in the most comprehensive technical inventory available for a specific, large tropical area |
| 1976 | Monographed Myxomycetes of American Tropics |
| 1983 | Monographed the phragmosporous species of Nectria and related genera in the Hypocreales |
| 1985 | Monographed the species of Tubeufiaceae, many of which are parasitic on leaf fungi |
| 1987 | Published checklist of species described in Cercospora leaf spot fungi |
| 1988 | Completed a world list of Phomopsis names with notes on nomenclature, morphology, and biology, including over 1,000 species with their hosts and type specimens |
| 1989 | Published a comprehensive account of the Fungi on Plants and Plant Products in the United States, including 13,000 accepted fungal species on 8,000 vascular plants hosts |
| 1991 | Described the fungus causing dogwood anthracnose as the previously unknown species, Discula destructiva; this description served as the basis for research on this important disease |
| 1991 | Published world monograph of Monilinia, fungi causing brown rot of stone fruits and other diseases |
| 1993 | Produced an index to the 200,000 species of fungi included in Index to Saccardo's Sylloge Fungorum and made this index available in print and electronic form |
| 1994 | Established public access to data files of over 650,000 herbarium specimens as well as databases of fungi on vascular plants both inside and outside the United States |
| 1995 | Published book on the scientific and common names of 7,000 vascular plants in the United States, a companion volume to fungi on plants and plant products |
| 1995 | Developed checklist and account of fungi reported on Rhododendron throughout the world |
| 1996 | A melon-killer fungus on cantaloupes, honeydew, and watermelons in Texas was described as a pycnidial genus and species new to science. This research allows the identification of this fungus and development of a control strategy for the disease. |
| 1997 | Information about plant-associated fungi was placed on-line through the World Wide Web. The databases include records of plant-associated fungi both inside and outside the United States, references on the systematics of plant-associated fungi, data on 700,000 specimens in the U.S. National Fungus Collections, and access to the source of published fungal names. |
| 1998 | Database developed of the host range and geographic distribution of plant-associated fungi for high-priority risk assessments. These data are essential to plant regulatory officials in making risk assessments concerning the allowable importation of nursery stock, logs, and other plant material. |
| 1998 | How-to manual for inventorying fungal biodiversity published. This document presents a standard set of techniques for sampling and isolating fungi from all kinds of substrates and habitats in a large, terrestrial area. |
| 1999 | A monographic account of the 56 genera included in the Hypocreales was published including a synopsis of the 149 excluded genera. Descriptions, illustrations and keys for identification to species were provided for most genera in the Hypocreales including their asexual states. |
| 1999 | Phomopsis amygdali causing peach shoot blight was characterized using morphological and molecular characteristics. These results are important for disease control, breeding for resistance, and implementing plant quarantine regulations. |
| 1999 | The fungus causing the plant-quarantine significant disease Karnal bunt of wheat, Tilletia indica, was distinguished from the new species described as Tilletia walkeri on ryegrass, thus saving the U.S. wheat export market valued at $6 billion annually. |
| 1999 | An on-line identification system for species of Tilletia in the United States was developed. This system is based on characteristics of their teliospores, specifically size, color, and ornamentation and the host on which the fungus occurs. |
| 2000 | Phomopsis vaccinii, which causes a twig dieback as well as a fruit rot, was distinguished from other non-disease causing species of Phomopsis that are commonly isolated from Vaccinium spp. A new species of Phomopsis, P. columnaris, on lingonberry was described. |
| 2001 | The database of plant-associated fungi reported both inside and outside the United States passed 500,000 records. Data from fungi associated with plants in South Africa were integrated into the SBML database. |
| 2001 | A new species of Trichoderma, T. stromaticum, was described that controls witches broom of cacao, the most devastating disease of the chocolate plant in South America. The Hypocrea sexual state of T. stromaticum was also discovered. |
| 2002 | An interactive key for the identification of the most common species of Trichoderma and Hypocrea was developed and placed on-line. This system includes descriptions and illustrations. |
| 2002 | The order Diaporthales or chestnut blight family is a large group of fungi consisting of approximately 100 genera of plant pathogenic fungi. A molecular study of this order showed that there are at least six major family-level lineages in the order. |
| 2002 | Green mold is a serious disease of cultivated mushrooms in the United States and Europe caused by a Trichoderma that was confused with one used in biological control. The cultivated mushroom pathogen was determined to be a new species of Trichoderma, T. aggresivum, that is distinct from the species of Trichoderma used in biological control. |
