Name:   Sunsetologist - Subject:   Japanese clover (aka lespedeza) Date:   7/10/2016 7:44:32 PM (updated 7/10/2016 7:54:40 PM)

This link may help you out  http://extension.uga.edu/publications/detail.cfm?number=B1395  I saw where you can order metsulfuron (the product is called MSM Turf) on Amazon for post emergent of japanese clover.  A cheaper chemical may be the Atrazine which seems readily available.  The UGA extension site suggests preemergent as the best way to battle this type of clover.