Tenacity after 2 weeks + second application

Here are some photos I took on Thursday (8/15) which is 2 weeks after the first application:

More browned grass in there this time along with the white, but also still some green.

I applied a second application on Sunday (8/18).

Tall fescue makes a comeback

Tall fescue sticks out like a sore thumb; I've noticed these clumps as the Kentucky bluegrass has gone dormant during the drier weather.

Either these are new plants (I doubt it), or they survived the Certainty treatment and have come back. Perhaps this is why the Certainty label was changed to remove use on cool season grasses?

I'll have to pull these by hand... and take care of those weeds :)

Tenacity application after 1 week

This is the one week followup to the tenacity I applied to creeping bentgrass 1 week ago. The bentgrass is turning white and looks like porcupine fur, and the surrounding kentucky bluegrass is lightened in color as well. The instructions say that the surrounding grass may also turn white on the tips, but will eventually grow out of it.

Here are some photos of what it looked like yesterday (Thursday):

Front yard fertilization

I put down 6.8 lbs of Espoma Organic Lawn Food on the front lawn on Sunday, which equates to about .75 lbs/1000 sq. ft. N. I intended to do this quite a while ago because we had gotten a lot of rain earlier in the summer, but all things gardening have taken a back seat these days; I do what I can. Lately it has been quite dry, so I've been irrigating a bit.

Tenacity applied

Having confirmed to a good enough confidence level, I ordered some Tenacity herbicide and applied it on Thursday (8/1). I couldn't find any dish soap to use as surficant that I was certain was non-ionic so I ended up purchasing some Bonide Turbo Spreader Sticker Concentrate online (not sure why they couldn't have just called it "Surficant", but anyway...).

Tenacity Herbicide & Bonide Turbo Streader Sticker Concentrate

This is what the label said for treating bentgrass:

Control of bentgrass (Agrostis spp.) and nimblewill (Muhlenbergia schreberi) - Apply Tenacity at 5 fl. oz. per acre in at least 30 gallons of water per acre at two to three week interval for up to three applications. Apply with a NIS surfactant. Bentgrass control may be more effective in the late summer/early fall just prior to onset of renewed bentgrass growth, than spring/early summer applications.

So I followed the label of both and mixed up 1 gallon of water with 1 tablespoon of the surficant and 1 teaspoon of the herbicide, and I applied just about all of it using a handheld sprayer. I also sprayed about a foot or so around the patches as I read somewhere that it'll help make sure to make sure to get all the stolons. I'm hoping to reseed these areas this fall, but if it takes 2-3 applications separated by 2-3 weeks that would mean seeding August 29th at the earliest (2x2 weeks) and October 3rd at the latest (3x3 weeks). We'll see how it goes.

Here are some before shots showing the creeping bentgrass in the lighter green (3 different angles of the same area):

It has spread impressively since last year when I first discovered it!

I'll try to post the progress. It should be interesting!