Sweetpotato DiagNotes is an interactive tool for extension workers, students, researchers and others who want to learn about the crop; about the pest, disease and other problems that can occur; how to diagnose crop symptoms and what management practices can be used to deal with sweetpotato disorders. Online version [1]
Links:
[1] http://www.lucidcentral.org/keys/sweetpotato/key/Sweetpotato Diagnotes/media/html/FrontPage/FrontPage.htm