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How To Make a 9volt Electric Snail/Slug Fence Keep Slugs Out Of Your Garden Beds

This is probably the most humane way to control slugs and barring something unusual it is 100% effective. This video shows how to install and test the electric slug control fence in a raised bed garden.

source/image(PrtSc): nlinventor

Slugs will ruin a vegetable garden pretty fast unless some serious means of taking care of them is implemented. The electric fence has proven to be pretty well 100% effective in my experiments to date.

source/image(PrtSc): nlinventor

The fence consists of two runs of wires spaced about 3/4 inch apart running around the perimeter of the raised bed – one wire is connected to the +ve terminal and the other to the -ve terminal of a battery.An electric current will flow through the slug if it makes contact with both wires at the same time. The resulting “shock” with usually cause the slug to turn back.

source/image(PrtSc): nlinventor

I’ve been using a 9-volt battery as the power source, the battery lasts the whole growing season but the voltage drops to 5 volts or so by the end of the season (my measurements).


It’s a good idea to check the volage once in a while to make sure the battery is still providing enough voltage (corrosion can be a problem at the battery connectors).

A few years ago when setting up a new fence I didn’t have a 9-volt battery connector so I used a multi-battery AA holder that I had on hand. The combined series connection of batteries gave 12 volts. This turned out to be a bad idea as the 12 volts would more often than not kill the slugs rather than just turn them away.