Questions? Enter keywords in search box below:


Termidor Insecticide

- A fipronil-based insecticide -

Summary: Termidor (tm) is a "new-generation", relatively low toxicity insecticide that is useful in a wide variety of pest control situations. Termidor contains the active ingredient fipronil and can be used for termites, carpenter ants, and nuisance ants outdoors.

Jack DeAngelis, PhD
OSU Ext. Entomologist (ret.)

Termidor treatment for termites and carpenter ants

Termidor (tm) is a relatively new insecticide with the active ingredient fipronil; see the fipronil factsheet and specimen product label below. There are a number of active labels for fipronil-based insecticides currently sold in the US including flea medications, a commercial agricultural insecticide called Regent, and of course Termidor for pests that damage structures like termites and carpenter ants.

Termidor SC (the SC stands for soluble concentrate) is labeled for use against termites, in pre- and post-construction applications, carpenter ants as an exterior perimeter treatment and for nuisance ants (exterior only). The smallest package size of Termidor SC is 20 oz (right) which makes 24 gallons of working solution at the lowest label rate. You will also need a good quality 1 gallon garden-type sprayer to apply the working solution for perimeter and spot treatments.

common misspelling: fipronyl

termidor sc insecticide package
Termidor SC

Termidor Insecticide has a "delayed effect"

Termidor is a slow-acting insecticide and this "delayed-effect" allows insects like termites and ants, which live in colonies, time to carry some of the insecticide back to the nest where it contaminates the whole colony. This is why Termidor works well for carpenter ants as a foundation or perimeter spray because workers pick up the insecticide as they travel back and forth from the nest and thus contaminate, and potentially kill, the whole colony (see Related Articles below).

While perimeter treatments for carpenter ants can be done by homeowners with the proper application and safety equipment (see specimen label below for instructions), Termidor treatments for termites generally require equipment and expertise beyond that available to most homeowners.


The pesticide label and the specimen label

A pesticide label (see Related Articles below) is the official "instruction sheet" for the product and contains all of the information required for registration in the US, as well as instructions for its use. A specimen label is exactly the same as an official label except that a specimen label is not attached to an actual product. Use specimen labels like the one below for general information only, always follow instructions that come with the product you are actually using.

Where to purchase Termidor Insecticide

Termidor is not available in stores but can be purchased here (DoMyOwnPestControl); it is not a Restricted Use pesticide.

do it yourself pest control products and supplies

Related Articles

Using Termidor Insecticide Against Carpenter Ants

Termidor SC Specimen Label (2004)  - This file is a specimen label for Termidor Insecticide the formulation of fipronil that is used in structural pest control.

Fipronil Factsheet - The National Pesticide Telecommunications Network (NPTN) factsheet.


If our information is useful click here to help us maintain and grow 'Bugs! You can also support 'Bugs by shopping through this Amazon link or the Amazon.com banner (left).

Don't forget to bookmark us for next time - press ctrl-D in most browsers.

Mission: To provide accurate, up-to-date and unbiased information for solving common insect and mite problems around your home, business and landscape using least-toxic methods.

Jack DeAngelis, PhD,  , email:  livingwithbugs@gmai[email protected]

Please see the Disclaimer statements as well.


Copyright © 2004-... LivingWithBugs, LLC. All rights reserved.