How can I control/discourage Large slugs??

Salt

There are methods using beer as bait posted on the internet, but I didn't find them very effective. I use a product called "Correy's Slug and Snail Killer" available at Home Depot. It's granulated and you sprinkle it in places where you see slug trails and around the bases of plants they tend to favor as food.

put a small saucer of beer in the ground, level with the surface. They can't resist the small of beer. They fall in and drown (happily).

Nick Way is spot on with his recommendation.

Sink a few bowls or plates in the ground level with the surface. Fill the bowls/plates with (cheap) beer. The yeast attracts the slugs. They drink their fill and drown. Not their sorrows

Anything you can make it uncomfortable for the slugs/snails to crawl on will deter them. A combination of solutions from everyone here should take care of them.

Broken nutshells work in the same way as egg shells when getting rid of slugs. Break up the nutshells into small pieces, and create a protective barrier around your plants. Any slugs that come near your vegetables will soon turn the other way.

Crushed egg shells work as a great home remedy of slugs. This is because slugs don’t like moving across sharp objects, although it isn’t not impossible for them to do, they just prefer not to. Break up the empty egg shells into small(ish) pieces and place around the flowers, plants, vegetables, and fruits you want to keep safe from slug damage.

Ash and Cinders make a rough protective barrier, and the fine ash also acts as a desiccant that dries the slug out. Wood ash and cinders are preferable. Avoid direct contact with plants.

Grit and Gravel. The sharp rasping edges of finely crushed ‘horticultural grit’ makes an excellent slug barrier. Coarser gravel is largely ineffective, other than for decorative purposes.

Sandpaper. Cut rings of sandpaper and slip them round the stems of vulnerable plants.

Sawdust makes a good coarse barrier around tender plants, also acting as a desiccant that dries the slug out. Hardwood sawdust is most effective, and some people recommend cedar or oak.

Copper Rings or Discs. Solid copper rings/discs of various diameter, used to encircle single or small groups of plants to inflict a mild electric shock on the unsuspecting slug. Look for rings that clip together. These are easy to slip round established plant stems, or join together to form a larger barrier.

Try using clean, dry eggshells that have been crushed. Sprinkle around the edges of the garden or around the individual plants. This causes the slugs to scratch their soft bodies which leads to dessication. (It works much like diathanthous earth (DE).

I would not use salt unless you out directly on the slug because it causes the eat to become barren!

Beer in jars or cans half buried in the earth are very enticing to slugs. Just add stale or fresh beer about a third of the way up. They crawl in and drink; hopefully, they'll drown. For this to work, you need to spread these around.

Diatomaceous earth. It's harmless to humans and animals but excoriates the outer layer of the slugs. Amazon sells it.

Use regular table salt in areas that does not have plants

Coffee grounds is a natural deterrent for slugs. Just put the grounds around the plant.

SALT POURED RIGHT ON THEM

I've not found the beer treatment to work. We used to feed a stray cat, and he complained mightily about the slugs getting into his food. (Who wouldn't?) I tried setting the dish inside a larger pan of beer, and the blasted slugs just swam through it and ate the cat food, anyway. Copper doesn't work. We didn't get rid out our slugs until we got ducks - and that's not always feasible!

great recommendations at Pinterest.com

I put coffee grounds in the area. broken egg shells are suppose to work also.