South Carolina General and Structural Pest Control 7A Practice Test

The substance specifically used to kill snails and slugs is known as a molluscicide. Molluscicides are specialized chemicals designed to target soft-bodied mollusks, including snails and slugs. These pests can cause significant damage to gardens and crops, making effective control measures essential for maintaining healthy plant life.

The other substances mentioned have different functions. A desiccant is typically used to remove moisture, which can kill certain insects by dehydrating them, but it is not specific to snails and slugs. Acaricides are focused on targeting mites and ticks, while miticides are similar and specifically target plant and animal mites. Thus, molluscicides stand out as the only effective option for dealing with molluscan pests like snails and slugs.