Environmentally friendly slug control. Its best to have a staged attack for different sizes of slugs. Firstly with the large slugs the best and fastest control its to start feeding your garden birds to attract them into the area so they eat the slugs,you will find blackbirds and other garden birds make short work of garden slugs, this works especially well in the spring when the birds are looking to feed young chicks, Next The black plastic bag method if you have a slug attack in one area in your garden this is a quick method to reduce the numbers. Take one black bin liner place on the ground in between your tender plants, then place two lettuce which are well pass the sales date. Finally add two tea cups of breakfast bran and pour a cup full of beer (bitter is best) over the lettuce. Leave over night with the top open and check in the morning, the slug should have climbed into the bag over night and as the sun raises in the morning taken shelter in the bottom of the bag, ready to be removed from your garden.
Finally for the smaller slugs try Parasitic nematodes these are very small worms that attack the smaller slugs. They are called (Phasmarhabditis hermaphrodita) and are available from Defenders Limited (01233 813121). These must be applied to the soil in solution. Be sure to follow the pack instructions. Treatment should be done in a block and the soil temperature must be above 5 degrees C
All these methods would be classed as organic and environmentally friendly as they are safe for other wildlife such as hedgehog’s etc