Greenhouse Tomatoes: Guidelines for Biological Controls
- This article outlines the biological agents available for controlling whitefly, fungus gnats, nematodes, mites, thrips and aphids, all best used as a part of an integrated pest management plan.
- http://www.appliedbio-nomics.com/technical-manual/410-tomato.pdf

Blossom End Rot in Tomatoes
- Article discussing this condition which is a physiological disorder caused by an imbalance of potash and calcium in the soil.
- http://www.nvsuk.org.uk/growing_show_vegetables_1/tomato-blossom-end-rot.php

Tomato Pest Management
- Provides an integrated pest management program from planting through to harvesting with information on the control of many diseases, insects, mites, nematodes and weeds.
- http://www.ipm.ucdavis.edu/PMG/selectnewpest.tomatoes.html

Leaf and Fruit Diseases of Tomato
- Information on the major leaf spot and fruit diseases, their causes and possible control methods, with photographs of the damage caused.
- http://www.oznet.ksu.edu/library/plant2/L721.pdf

Bacterial Spot, Speck and Canker of Tomatoes
- Photographs of these diseases affecting this crop, the symptoms, causal organisms and management.
- http://ohioline.osu.edu/hyg-fact/3000/3120.html

Septoria Leaf Spot of Tomatoes
- Photographs of this disease, the symptoms, causal organism and control methods.
- http://ohioline.osu.edu/hyg-fact/3000/3112.html

Wilt, Nematode and Virus Diseases of Tomato
- Photographs and information on these diseases of tomatoes, the symptoms, causal agents and control.
- http://www.oznet.ksu.edu/library/plant2/l723.pdf

Fusarium Wilt
- Photographs of infected tomato plants and lesions on stems.
- http://www.forestryimages.org/browse/subimages.cfm?SUB=9494

Beet Curly Top Virus, Hybrigeminivirus
- Photograph of a tomato plant infected with this virus.
- http://www.forestryimages.org/browse/detail.cfm?imgnum=0454051

Blight on Tomatoes
- Photograph of some lower leaf surfaces.
- http://www.apsnet.org/online/archive/1998/latetom.htm

Anthracnose of Tomato
- Factsheet with photographs and information on this condition, including the symptoms, causal organism and control.
- http://ohioline.osu.edu/hyg-fact/3000/3114.html

Tomato Disease Factsheets
- Information on a number of viral, fungal and bacterial diseases that may infect tomato crops.
- http://vegetablemdonline.ppath.cornell.edu/factsheets/Tomato_List.htm