Not sure you can still buy carbon tet, but I suspect that the seed fumigant like phosphene gas pellets that will do the same job.
“Not sure what the modern wood chuck control method is, but the old timers eradicated the prairie dogs with corn cobs soaked in “high life” (carbon tetrachloride). They dropped the soaked corn cob in the hole and tamped dirt on top.”
Raccoons got into our garage and ate the granulated cricket
bait. The whole family died. I don’t take any delight in telling you that, but they had been doing a lot of damage.
Those “flairs” you light and stick down the hole work well,
be really careful to follow the directions! I lit one in the garage, and then walked to the front yard to plant it..not smart!