"IT" would be the "chemical", and expensive is a "relative term". I used the "scanmask" sprayable, from here:
https://biologicco.com/product...
and . IF they last as long as they say (before retreatment is needed...18 months) it will actually be cheaper than the *Bayer grub control and the other stuff I use, now
. Some folks have real good luck with nematodes, but, it remains to be seen whether they will work out for me.