Warren – you are right, it is I.
I am injecting oxygen and propane into their holes (a mixture of 3% propane and 97% oxygen). Moles are very susceptible to concussion and when the mixture goes off it makes quite an explosion. Even if they are not killed by the initial blast, it should get some of the others from the concussion. Propane is heavy so it will flow into the hole and into the lower chambers.
The field I am doing was disked early this summer, so there was no sod on it and it throws more dirt from the explosion than a lawn or field with grass on it. I no longer have moles in the field but they keep moving in from the timber, especially in two areas. The field has been planted now so every time I see any sign that they are moving into the field, I blast them.
The mole gun I am using was developed by a farmer in Idaho about 15 years ago. He started a business to market the device but went bankrupt. Now there are three companies I know of that make similar devices. They cost from $1,500.00 to $3,500.00 and that is without the tanks.
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Dave