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» An Overview of Viruses Infecting Dioscoria Yams in Sub-Saharan Africa
   Viruses in yams produce a range of symptoms including mosaics, mottle, distortion, stunting and chlorosis. This article gives details of many of these and their vectors, and suggests ways of growing virus free crops.
   http://www.iita.org/cms/details/virology/pdf_files/432-439.pdf

» On the Bright Side of Yam Production
   Nigeria is the leading producer of yams in sub-Saharan Africa but most farmers face problems with declining productivity, disease, cost and scarcity of clean planting material. A project in Kogi States is showing farmers how to grow their own disease free
   http://www.new-ag.info/06-3/develop/dev03.html

» Yam Diseases in Ghana
   Outlines research into the nature and impact of diseases which may affect the yam crop.
   http://www.bspp.org.uk/icpp98/4.7/1.html

» Yam Virus Diseases in Sub-Saharan Africa
   Results of a survey undertaken to try to provide further information on viral infections in this important crop in sub-Saharan Africa.
   http://www.iita.org/cms/details/virology/pdf_files/128-136.pdf