Jul 10, · Copper mesh being used against slugs and snails: Check prices on Amazon. Copper mesh can be used to deter slugs, rats, and birds from your plants. To deter slugs, copper mesh should be anchored in the ground with pegs to create a tiny fence. As seen in the picture, it can also be nailed or glued to raised beds and planters.5/5(5). Slugs in the garden can be a huge problem and apparently copper is a good slug repellent. If you encircle your plants with copper tape, it will keep the slugs out. It must work – since there are a number of copper tape products on the market designed to get rid of slugs. Using copper strips is a natural and environmentally friendly way to control slugs and snails around flower beds, flower pots and containers, trees, and in the garden. The combination of copper and slug/snail slime produces a small electrical charge that deters them from crossing the copper strip.