Nigel (Holt Studios International, UK) D. Cattlin & Bud (Crops and Livestock Research Centre Agriculture and Agri-Food, Charlottetown, Canada) Platt 
Diseases, Pests and Disorders of Potatoes [PDF ebook] 
A Colour Handbook

Covering the most important pathogens, this handbook provides clear, concise descriptions of the symptoms and cycles of diseases and disorders, and the pests that commonly prey on potato crops, their distribution and importance, and advice on their control. The text is illustrated with some 235 superb color photographs of affected crops to aid in the rapid and accurate identification of disease. It provides a practical reference for professionals and students involved with potato production, handling and storage worldwide.

Diseases and Pests covered include: Potato early blight, Gray mould, Black dot, Ring rot, Blackleg, Soft rot, Pit rot, Dry rot and wilt, Violet root rot, Silver scurf, Aster yellows, Witches broom, Pocket rot, Gangrene, Pink rot, Potato late blight, Skin spot, Spraing, Mild Mosaic, Sev. Mosaic, Net Necrosis, Watery wound rot, Leak, Brown rot, Stem canker, Black Scurf, White mould, Powdery scab, Common scab, Wart, Spraing, Verticillium wilt.