how to kill japanese clover

How do I kill Japanese clover in my St. augustine Floratam lawn without killing the grass?

We've had great results with the ATRAZINE for clover. It can handle a wide range of weeds and safe for use on St Augustine.

Here is a direct link to it in our catalog:

Atrazine:  http://www.bugspray.com/catalog/products/page2058.html