Last couple of years was really rainy here and my garden was being eaten alive by armies of slugs every night. (Daytime they hide under anything they can.) I tried salt, flooring sandpaper, copper tape, beer, coffee grounds diatomaceous earth and eggshells. All the "mechanical" methods. And apparently Michigan slugs don't like beer because despite numerous shallow bowls placed all over the garden repeatedly I found not one single drowned slug. (Maybe I should have used craft beer instead of Old Milwaukee lol.)
None. Of. It. Worked.
Sluggo did. (I believe it is certified organic at least in some states.) It's a "natural" biological element, not a man-made chemical, does not remain in the soil and pretty much harms nothing but slugs and snails. After application all the slugs pretty much disappeared. Google it; it's available pretty much everywhere.
