acaricidal

Acaricide is a related term of acaricidal.

As a noun acaricide

is any substance which kills acarids (mites and ticks).

As an adjective acaricidal is

deadly to acarids.

As adjectives the difference between acarid and acaricidal

is that acarid is (biology|zoology) of or pertaining to acarids while acaricidal is deadly to acarids.

As a noun acarid

is (biology|zoology) any parasitic arachnid, such as mites and ticks, of the subclass acarina.