expert system for plant disease identification?

[Glenn]

Netters,

   Does anyone have any experience with or leads on an expert system
or other software useful for diagnosing plant diseases by
morphological and biochemical data?  I'll gladly hear about any
software, regardless of cost or platform.  Thanks in advance,

Glenn Brooke, Ph.D.
Pioneer Hi-bred International, Inc.
brookerg at phibred.com