Virus Problems of Potatoes
- Photographs of symptoms and information on virus Y, leafroll virus, virus S, virus X, mop top virus, spraing, tobacco rattle virus, potato spindle tuber viroid and alfalfa mosaic virus.
- http://vegetablemdonline.ppath.cornell.edu/NewsArticles/Potato_Virus.htm

Scab of Potato Tubers
- Photographs of potato tubers infected with this disease, the symptoms and causal organisms.
- http://ohioline.osu.edu/hyg-fact/3000/3105.html

Rhizoctonia Stem and Stolon Canker of Potato
- Photographs of these diseases affecting potatoes, the symptoms, causal organisms and management.
- http://ohioline.osu.edu/hyg-fact/3000/3108.html

Potato Yellow Dwarf Virus, Nucleorhabdovirus
- Photograph of an affected plant and a description of the symptoms.
- http://www.forestryimages.org/browse/detail.cfm?imgnum=1949048

Potato Pest Management
- Provides general information on pesticides and details of the diseases, insects, mites, nematodes and weeds that may attack this crop.
- http://www.ipm.ucdavis.edu/PMG/selectnewpest.potatoes.html

Potato Late Blight
- Photograph and description of the symptoms of this disease caused by the fungus Phytophtora infestans, its biology and advice on control measures.
- http://www.sac.ac.uk/consultancy/cropclinic/clinic/diseases/blight

Potato Damage
- Image of tuber infected with Thecaphora smut.
- http://www.apsnet.org/online/Archive/2002/potato76.asp

Potato Cyst Nematode
- Information on the two species, Globodera rostochiensis (golden cysts) and Globodera pallida (white cysts), their biology and advice on control measures.
- http://www.sac.ac.uk/consultancy/cropclinic/clinic/pests/PCN

Pest Management: Aphids
- Virus transmission can prove disastrous in potato crops. Syngenta offers information on the action that can be taken to control aphid vectors.
- http://www.syngenta-crop.co.uk/Crop+Information+Centre/Potato/Pest+Management/

Organic Alternatives for Late Blight Control in Potatoes
- New strains of late blight make potato production especially challenging. Several nonchemical options are available for managing this disease, including cultural practices, some varietal resistance, and alternative fungicidal sprays.
- http://attra.ncat.org/attra-pub/lateblight.html

Late Blight of Potato
- Photographs of plants and tubers affected by Phytophthora infestans, the life cycle of the fungus, the symptoms and plant health management.
- http://nu-distance.unl.edu/homer/disease/agron/Potato/PoLtBlt.html

Fusarium Dry Rot and Seed-Piece Decay of Potato
- Photographs of these diseases which cause serious losses in stored tubers, the symptoms, causal organisms and management.
- http://ohioline.osu.edu/hyg-fact/3000/3107.html

Diseases of Potatoes
- An identification guide to the bacterial, fungal, nematode, viral and other diseases that may infect this crop, with many photographs, brief descriptions of the symptoms and suggested management strategies.
- http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/prm8938

Diseases of Potato
- Information on various diseases which may affect this crop, the life cycle of the causal agents, the symptoms and plant health management.
- http://nu-distance.unl.edu/homer/disease/agron/potato/

Blackleg, Aerial Stem Rot, and Tuber Soft Rot of Potato
- Photographs of these diseases affecting potatoes, the symptoms, causal organisms and management.
- http://ohioline.osu.edu/hyg-fact/3000/3106.html

Biology and Management of Potato Insects
- Illustrated account of the various pests that attack this crop below the ground, chew foliage and stems or suck the sap, with possible control measures for each.
- http://www.ianrpubs.unl.edu/epublic/live/ec1565/build/ec1565.pdf

Bacterial Ring Rot of Potatoes
- Photographs of this important disease of tubers, the symptoms, causal organism and management.
- http://ohioline.osu.edu/hyg-fact/3000/3103.html

Aphid Monitoring
- Aphids can transmit Potato Virus Y which is a serious threat to potato crops. The British Potato Council offers a service monitoring this pest to help in decision making on insecticide use.
- http://aphmon.csl.gov.uk/

Potato Pink Rot, Pythium Leak and Seed-Piece Decay
- Photographs of these diseases affecting tubers, the symptoms, causal organisms and management.
- http://ohioline.osu.edu/hyg-fact/3000/3104.html

Potato Disease Factsheets
- Description of disease and management for Botrytis blight, common potato scab, late blight, powdery mildew, and oedema from Cornell State University Extension, U.S.
- http://plantclinic.cornell.edu/vegetable/potato_factsheets.htm

Potato Disease Problems
- Information on wart disease, late blight, leaf roll virus and net necrosis, silver scurf, and storage management from University of Idaho, U.S.
- http://www.uidaho.edu/ag/plantdisease/potato.htm