Verticillium Wilts in Tree Species
- Information from an EU-funded research project including a compendium on Verticillium wilts in trees (pdf-format), links to the participating groups and a description of ongoing research.
- http://www.plant.wageningen-ur.nl/projects/verticillium/

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, and forest.
- http://www.pk.uni-bonn.de/ppigb/ppigb.htm

Guide to Plant Disease Control
- Resource of many plant diseases, images, and control recommendations from the Oregon state University.
- http://plant-disease.ippc.orst.edu/

Database Resource for Analysis of Signal Transduction In Cells
- Provides an understanding of signaling between plants and pathogens with animated movies and diagrams. Includes database of plant genes regulated in response to infection, and related links.
- http://www.drastic.org.uk/

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.
- http://www.apsnet.org/online/common/

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.
- http://www.planthealthaustralia.com.au/

New Zealand Plant Diseases
- Database of fungal pathogens on trees, shrubs, and herbaceous plants. Search by pathogen, host or recording authority.
- http://www.landcare.cri.nz/science/nzpddb/

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