Question

People sometimes suggest putting salt on a slug to kill it. why would the salt hurt the slug

Answer 1

Salt will dehydrate the slimy extior around the slug causing the slug to dehydrate and die.

Step-by-step explanation:

Salt draws water out their skin. This is called the Osmosis effect. The skin around a slug is called the mantle.

Answer 2

Because the slug is protected by enzyme like proteins surrounding the body, connecting it to the nerve system, since salt has sodium, the slat is used to desentegrate that nerve system, then eventually destroying the body.