Which pesticide is specifically used to control snail and slug populations?

Molluscicides are the specific type of pesticide designed to target and control populations of snails and slugs. These chemical agents are formulated to be effective against members of the mollusk family, which includes these pests that can cause significant damage to gardens and crops. Molluscicides work by affecting the physiology of the snails and slugs, ultimately leading to their death, thus providing a means of pest management for those dealing with infestations.

The other options represent different classes of pesticides that do not target snails and slugs. Piscicides are used to control fish populations, nematicides focus on nematodes (microscopic roundworms that can harm plant roots), and herbicides are applied to manage unwanted plants or weeds. Each type has a specific purpose, and molluscicides are uniquely tailored to address the challenges posed by mollusks. Understanding this distinction is key to applying the right pest control measures effectively.