How to flush out a groundhog

Alright I have a real problem.A whole community of groundhogs has just made its home in my dams retaining wall. I have counted around five separate holes in the wall and have tried to smoke them out with around 5 separate smoke grenades, but apparently the tunnel system is much like the Viet Cong and are just to vast. I need to nail these rodents ASAP before they break through. Any help would be great thanks.

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Get yourself a 10 foot piece of 1 inch diameter, thin wall plastic black tubing. Like what is used for shallow well pumps. Double up an old sock and place over the one end. I also use a newspaper bag with holes in it, tie it on loosely over the sock. Carefully push the sock covered tube end down into main Groundhog entrance, push in without pulling back on tube. Shovel dirt around tubing and also cover secondary entrances. Place a funnel in open end of tube and carefully pour in a quart of Ammonia, followed by a quart of Bleach. DO NOT INHALE FUMES!!! Allow to set a minute, then slowly pull out tubing with a twisting motion , so that sock remains in hole.The sock works as a wick for the gas. Cover the entrance more thoroughly. You have killed the hogs! This is more effective if done after dark or after scaring hogs back into the hole. I only need to do this every other year.

Kknsimagineer - THANK YOU.
The war is over and I have won. Thanks to the tube & socks method but I used half gallon of each liquid. then covered the tube with soil and lots of rocks. left it in overnight with a plug in the tube and followed it up the next morning with 90 minutes of water. planted their favorite food (basil and kale) and not a nibble after two weeks.

You are most welcome. Yes these chemicals can be a dangerous combination. But using guns or propane can be as well. With a little common sense , this method of eradicating groundhogs...is the easiest and most effective method that I have found. Congratulations on your success.

Yes, dont own a gun and propane scares the daylights out of me when just an errant spark can end your day. Weeks later, not even a nibble on the tasty kale, basil and other fine plantings. Gotta cut the lawn a bit more with no more chucks but the blood pressure is way down and havent sprained an ankle bolting out of the kitchen screaming like a banshee!!!!

I know it is a very old topic but mixing bleach with ammonia is not for the faint of heart.
The most dangerous chemicals produced by mixing them are Chloramine, NH2CL and Hydrazine N2H4.
Chloramines can form chlorophenols and both are nasty chemicals.
And well, Hydrazine is not just toxic but also quite unstable.


I would mess around with a lot of chemicals on my property but not really with this particular combination.

galvis12121 year ago

Get assorted fruits and put them outside the hole, step back 50-100 yards and light that sucker up with whatever caliber bullet you want. (I have found .243 to be the best round for this situation)

Get a ferret they are made for ferreting out groundhogs and stand over the den with a shotgun.


Dr Qui6 years ago
Go rent the movie Caddyshack,  Bill Murry has some interesting ideas re pest control.

crapflinger6 years ago
i know this whole post is old as dirt, but http://www.undergroundexterm.com/groundhog_extermination.html that is pure genius.
thenoogler6 years ago
Drop firecrackers down the hole, then finish it off with something. Seriously, drop a lot of them.
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