How do you get slugs out of flower bed?

I have resd that if you place a cup in the ground, lip level with the groung and fill it with beer the slugs will go into it and die. After you get rid of them, scatter Diatamaceous Eath in and around the bed, the slugs will not cross it because it cuts their bellies. It will not cut your skin, even if you walk on it. I foumd it at Lowe's or Home Depot. Hope it helps.