a substance the kills fungi
poisin
An arachnicide is a substance which kills arachnids.
Antibiotic's
An aphidicide is a substance which kills aphids.
A pediculocide kills lice. It is a class of insecticides.
An antibacterial or a bacteriocidic substance kills bacteria.
parasite
Alcohol
i think poison
An acaricide is a substance which kills acarids - mites and ticks.
A substance that kills insect; a toxic substance used to control populations of insects by killing them.