it would be really helpful if you could drop a few photos to this message using the "choose them' button below.  Would that be possible?

Hello,

This information is from the MSU Turf Weeds.net for Creeping Bentgrass (P) — Agrostis palustris — Family: Poaceae — Grass

The information is broken down by Habitat, Also Known As, Look-Alikes, Management & Control

This information should answer your questions - what you are asking for is a long process - I also attached the Tenacity information to this e-mail!!

Habitat: Creeping bentgrass is a spreading cool-season perennial grass that is commonly used for golf course greens, tees, and fairways. Like other grasses, bentgrass can be considered a weed when it is present in another species.

Because bentgrass spreads by stolons, it is possible for bentgrass to encroach adjacent turf areas. Irrigation is almost always required for bentgrass to survive beyond where it is planted.

Bentgrass becomes very 'puffy' when maintained at mowing heights above one inch.

Also Known As...

• bent
• creeping bent

Look-Alikes: Creeping bentgrass is most often intermixed with annual bluegrass. At very low mowing heights is can be difficult to distinguish at a glance. The leaves of bentgrass are much rougher and without a prominent folded midrib as compared to the smooth texture and folded vernation of annual bluegrass.

Creeping bentgrass may also be confused with bermudagrass and nimblewill. Bermudagrass is covered with hairs with very coarse stolons. Nimblewill lacks the hairs of bermudagrass but has a very wiry appearance with longer internodes.

Management: Creeping bentgrass likely indicates adequate-to-moist soils. It will not thrive in shaded conditions. Cultural management is difficult as it will respond positively to most turfgrass maintenance practices.

Selective removal of patches may be accomplished by solarizing the affected area. Clear plastic can be fixed over the affected area for five-to-seven days. The resultant smothering and radiation (heat) will kill all turf under the plastic. The area can be immediately re-seeded.

Control: 

Option 1: Mechanical Removal - Due to the perennial nature of bentgrass and its well-developed stolon system it is very difficult to remove by mechanical means. Methods include digging up the offending patches, including several inches of soil, and replacing them with new topsoil and reseeding. However, any stolons that remain can potentially develop into new plants. Another option is solarization. This method uses clear plastic fastened securely to the ground over the bentgrass areas. Be sure to cut the plastic slightly larger than the patches. Leave the plastic in place for 5-7 days in the spring or summer when the weather is nice. The plastic will help trap the heat close to the soil surface and hopefully devitalize the plant material. After removing the plastic you may reseed the area(s). This method can be very effective for creeping bentgrass because of the vegetative tissue close to the surface.

Option 2: Non-selective Chemical Removal - Glyphosate. Use a non-selective herbicide that contains glyphosate to kill the patches. Keep in mind that non-selective means that it kills whatever plants it touches. This method will create dead patches that can be re-established. You will need to make at least two applications. Make the second application 14 days after the first. Seven days after the second application you can rough up the area and sow your new grass seed.

Option 3: Selective Chemical Removal - Until recently, none were available. Mesotrione is the only labeled active ingredient for the selective control of bentgrass in other cool-season grasses. (Tenacity's Active Ingredient is Mesotrione) As with other selective grass controls, it requires multiple applications per season. The most effective control is achieved from 3-4 applications applied 14- to 21-days apart.

Option 4: Do Nothing - Obviously creeping bentgrass is green and takes a mowing. You may decide after looking at the other options that it is better than bare soil.

Disclaimer: Always read, understand, and follow the label directions. Mention or exclusion of specific products does not represent an endorsement or condemnation of any product by Michigan State University.

The information above is also at this link:

http://www.msuturfweeds.net/details/_/creeping_bentgrass_42/

Hope this helps!!

You are welcome!! Good luck with this endeavor!!