Do the moths look like

If so, they're sod webworms. I don't know how to treat them, although insecticidal soap may work. Actually, you could probably use just about any soap (but you probably don't want anti bacterial soap).

I think if I were you, I'd continue with the clover and consider transitioning to wheatgrass from the KBG. Don't you have some of that growing on part of your land already?

If those things are 3/4 " long, then them's the critters. I've got some of the wheat grass growing, but thats mostly around the pond and away from where all this is happening. They do leave that alone. Actually, I got some wheat grass popping up in the driest places where this activity is going on.

I'll go look into getting them with soap. That I can do.

Keep us posted.

Well, now that I know what to look for, I can assure you that there is many an internet source on the control of the sod web worm. It looks like a multi-pronged approach here is the ticket, some species of grass have some species of fungus that web worms don't like, (found that here) and pretty obviously, here at ground zero, that includes western wheat grass, and that they're susceptible to Bt - mow short, spray, and leave as long as possible before mowing again.

There are contradictory management ideas on dryness / moisture.

Re the soap thing, there is a way, they say, to use some diluted stuff to make the little guys come out of their silken tunnels as a verification tool, but if it's too strong, then it kills them. I think my first trial with this was too strong.
I now have some very clean thatch, though.

"I now have some very clean thatch, though. "

And at least temporarily, when you water it should penetrate a little better since soap is a surfactant.

Ok, a little help here. I'm familiar with surfactants, and use them in some sprays where certain herbicides (in the fight against common, lethal, over-powering invasive species on millions of acres, mine but an infinitesimal amount in the overall scheme of things) so I use automatic dishwasher rinse stuff.

But, that might whack the Bt, of which I ordered a gallon of the stuff.

So, I would surely appreciate some suggestions on organic-style surfactants that will help Bt scoot down the top of the lawn towards where sod web worms dwell, w/o killing Bt. Note serious, thick-remaining-turf issues.

If you're worried about the anti bacterial actions of some soaps, you can use a baby shampoo.

I got the stuff yesterday. Fooled around a bit with the nozzle settings on the sprayer, and *thinking profoundly* as I wandered around the 2 acres in the 94ºF heat, that what needed to be done was to twist the nozzle into a strong jet, and walk slowly along the uphill parts, shooting a concentrated stream down into the roots and soil, where the irrigation water will spread it out.

We'll see how it works. Clouds and clouds of the moths.

It didn't work. Positively cumulonimbus clouds of moths yesterday.

OTOH, more and more of the over-seeded clover has germinated and grown, and where thats established, the grub holes have rapidly disappeared.