Antagonist to the nicotinic acetyl choline receptor in
the central nervous system, Imidacloprid disturbs the
proper signal transmission system leading to
excitation of nerve cell and consequently a disorder of
the nervous system leading finally to the death of the
treated insect.
Insecticide Resistance Action Committee (IRAC) Classification No. 4A
Fipronil primarily acts as an ingestion toxicant with some complimentary contact
action and acts by interfering in nerve impulse transmission.
Insecticide Resistance Action Committee (IRAC) Classification No. 2 B