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To get rid of snails or slugs, place a glass or can in a hole so that the top is level with the ground, fill almost to the rim with beer and leave overnight. In the morning, dump the pests on the compost heap.
By duckie-do from Cortez, CO
Slugs and snails will be attracted to the beer and will fall in and die. The salt will kill them, but will also kill any grass or plants that it touches as well. Be very careful when using salt.
Slugs in the garden may be a problem for you. If they are just fill a plastic cup with beer and put it in the ground so that the top of the cup is ground level. The slugs will be attracted and in the morning you will have a cup'o slugs.
Didn't work for me tried putting layer of Vaseline around edge of potted plants with some results.
Don't finish your can of lager/beer? Remove the complete lid and bury the can upright in the ground with about 1 inch sticking out. That should then give the slugs a wonderful way to die as they will climb in for the irresistible beer but cannot get out.