Up until a few years ago, there were not many herbicide alternatives for Bermuda control in cool-season grasses. Fortunately, a herbicide called Pylex hit the market about 4 years ago. Pylex, which interferes with photosynthesis by disrupting chlorophyll production, will suppress and eventually kill Bermuda that is growing in cool season grass. The rates are extraordinarily low.... for example, in bent grass areas, we are applying Pylex at .5 ounces per acre. That is 1/2 of an ounce over 40,000+ square feet of grass. Nonetheless, this product works very well with minimal downside. The only downside is the aesthetic color of the suppressed Bermuda and surrounding bent.
We can mix another broad leaf herbicide, Turflon, with the Pylex to reduce the whitening. However, half of the battle is to accurately locate the Bermuda infestations, so on our first application, I leave the Turflon out so that the Bermuda is easily located for additional applications.
So, if you begin to notice any white patches across the property, please know that it is our Bermuda grass program kicking off for 2015.