Plantstress - Discussions and articles on plant environmental stress, its impact and mitigation in agriculture. Includes news, announcements, events, bulletin board, and reference database.

Common Names of Plant Diseases (listed by host) - Searchable database of the official names adopted for use by the American Phytopathological Society in its publications. Includes diseases caused by bacteria, fungi, nematodes, phytoplasmas, virus (and virus-like), and miscellaneous diseases/disorders.

New and Emerging Plant Diseases Project - Provides agricultural producers with a comprehensive listing of new, emerging and re-emerging plant diseases throughout the world. Lists sorted by disease, host or pathogen.

Plant Pathology Internet Guide Book - Resource for phytopathology, applied entomology and related sciences on topics like pesticides, plant diseases, pest management, plant pathology education, mycology, viruses, bacteria, nematodes, biological control, turf management, forest and more.

New Zealand Plant Diseases - Database of fungal pathogens on trees, shrubs, and herbaceous plants. Search by pathogen, host or recording authority.

Diagnosing Plant Damage - A how to approach on accurate diagnosis, with diagrams and photographs.

Plant Health Australia - Commission projects and develop policies to enhance the ability of Australian agriculture to respond to pests, weeds and diseases. Includes corporate and operational plans, projects, members list, publications, and related links.

Database of Integrated Pest Management Resources - Search engine covering a wide array of crops, pests, control tactics, regions, organizations, and related topics.