The short answer to the problem of slugs is integrated control and what that means is using several different methods to protect your plants. Choose from the many weapons in the war on slugs to create the best result. Whatever you use, consider the impact of your control method not just on the immediate environment but think about the bigger picture too. Poisoned pellets are highly toxic to children, pets and wildlife; there are many viable alternatives that offer a much safer and equally effective control method.
You can help keep pesky slugs under control by harnessing the power of nature. Feed the birds, encourage the hedgehogs with suitable habitats: hedges, houses and leaf litter. Build a pond (with shallow slopes for escape) to provide water for wildlife and breeding sites for slug predators such as frogs and toads.