Brown spot vs. bacterial blight

Comparison of brown spot (left) and bacterial blight (right) in soybean.

Brown spot vs. bacterial blight

This image appears in the following articles:

Early season foliar diseases of soybeans (July 1996)
Soybean foliar diseases appearing (July 1997)
Soybean disease scouting in July (July 2001)
Soybean brown spot and bacterial blight (July 2003)
Soybean diseases to scout in July (July 2004)