borers

We inherited an old mature maple in our backyard. Canopy looks decent for how old it is, but recently we have noticed a pile of grass falling onto our sidewalk path. The other day we found a borer larvae of some kind but not sure what is is - anyone able to tell me? They all look so similar to...

Are most of you fellas using a heat cycle on the lumber and slabs before the projects begin or are there other options these days? I saw one guy use a salt/boric acid mixture rolled on the wet slabs but, I'm not sure if that replaces the heat cycle.