Slugs are every gardener’s worst nightmare. No matter how diligently you pick them off your plants, more are sure to follow. Do what it takes, but as little as possible to control slugs, says the German Agricultural Industry Association (IVA). If the infestation is small, try collecting the slugs by hand or setting up fences and copper barriers around beds. Slugs don’t like touching copper, so either tack copper tape around your pots or along the stone or timber rims of the beds, or place solid copper rings around your plants. Watering the garden in the morning instead of the evening can also …