looks like necrotic spot virus
http://www.umass.edu/umext/floricult.../insvtswv.html
http://www.rhs.org.uk/advice/profile...croticspot.asp
http://www.coopext.colostate.edu/TRA...NTS/insv1.html

"Steve Kraus" wrote in message
link.net...
My mom's impatiens are getting these spots on the leaves with yellow and
fall off. What's the diagnosis?

Photo:
http://i4.photobucket.com/albums/y12...c/P9170064.jpg