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Copper Barriers for Slugs: Mixed Results and Penny Myths

Copper sheet or woven wire barriers can deter slugs via electro-galvanic reaction, but modern pennies contain too little copper to work. One gardener found slugs crawled over copper wire rings. Long-term solution: stop leaving pet food outdoors. Copper barriers may help but are not foolproof.

See Unimpressed with copper slug control
NOTE: Current pennies have low copper content.
NOTE: Copper wire rings failed to stop slugs in one test.

About Gardening: Organic Solutions for Slugs and Caterpillars on Broccoli; Comprehensive Slug and Snail Management for Lawns and Landscapes; Effective Slug and Snail Control for Vegetable Gardens; Copper Barrier for Snail Control on Fruit Trees; Winning the War on Slugs and Snails: Eco-Friendly Strategies for a Healthy Garden; Effective, Eco-Friendly Ways to Control Slugs and Snails in Your Garden; Effective Strategies for Controlling Slugs and Snails in the Garden; Effective Slug Control for Container Gardens; Safe Slug Control with Iron Phosphate; Using Copper Screen to Repel Slugs and Snails from Pots and Beds

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