Sadly it did not work. I literally put this in the most active tunnel...the tunnel that I would stomp down daily with my foot and see it repaired hours later. I put two in this tunnel! one facing in each direction and placed a flat rock on top. The next day as if it was a joke, the two burnt smoke tubes were tossed out. I tried 8 tubes in various places and no luck. Amazing how much damage these little critters can make. I've tried all the traps too with no success. The best method is to wait patiently for movement and stomp down on that spot hard...I killed a few this way-out it takes too much thought and time. My last effort has been "lawn grub killer". I avoided this for a several years as it's poison and I assume it's not safe for birds and other animals eating from the lawn. I did it this fall and I will reapply this spring. I feel bad but these guys destroyed my lawns!  3  stars for the fun using these :)
Sadly it did not work. I literally put this in the most active tunnel... the tunnel that I would stomp down daily with my foot and see it repaired hours later. I put two in this tunnel! one facing in each direction and placed a flat rock on top. The next day as if it was a joke, the two burnt smoke tubes were tossed out. I tried 8 tubes in various places and no luck. Amazing how much damage these little critters can make. I've tried all the traps too with no success. The best method is to wait patiently for movement and stomp down on that spot hard... I killed a few this way-out it takes too much thought and time. My last effort has been "lawn grub killer". I avoided this for a several years as it's poison and I assume it's not safe for birds and other animals eating from the lawn. I did it this fall and I will reapply this spring. I feel bad but these guys destroyed my lawns! 3  stars for the fun using these :)