Ant Pest Control
Pest control for ants has become a major topic for professional pest
control operators and individuals who are interested in do-it-yourself pest
control. The list of home remedies, over the counter sprays and products
developed within the professional pest control industry is one that grows every
Of all the different pest control products for ants there are two basic groups
of such materials: ant baits and contact
insecticides for ants.
Simply put: ants eat baits which kills them; contact insecticides must contact
the ants to kill the ants. Read and follow label instructions.
This article is an in-depth discussion for different types
If you just want to know what to use, go to Best Ant
The most confusing group (for the average person) is that which contains
contact insecticides. Within this group are granules,
sprays, aerosols and dusts.
A contact insecticide is basically exactly what the term implies: the ant (or
other targeted pest) must come into contact with the material before it is
affected by the material. There are hundreds of over the counter aerosols
or sprays that can be used to spray directly on visible ants or ant
trails. These products give immediate results (killing the ants on
contact) but rarely solve the problem of ridding the home or building of ant
Ant Control Granules
Although there are granular ant baits, this section is an explanation of
granular, contact insecticides. Some examples of granular insecticides are
Diazinon, Dursban, Talstar, Over'n
Out, DeltaGard. All of these products
are used outdoors only and are not to be used inside buildings.
for a granular product to work to its highest potential it should be broadcast
over entire area of infestation. Many people will purchase granular
insecticides and use them to spot-treat individual ant beds. Best results
are achieved when the granules are broadcast over entire area where ants are
known to forage for food or where ants are seen. Once the granules have
been spread out over the targeted areas, water should be applied in order for
the insecticide to work.
An insecticide granule consists of two basic elements: an insecticide (active
ingredient) and a carrier or solid particle on which the active ingredient is
impregnated. Older types of insecticides (Dursban, Diazinon, Oftanol)
contain organophosphate materials. The newer types (Talstar, Over'n Out,
DeltaGard) contain synthetic or man-made pyrethrin materials. Talstar
contains Bifenthrin, Over'n Out contains Fipronil and DeltaGard contains
Deltamethrin. These newer chemicals are safer for people, pets, wildlife
and the environment than the older and heavier organophosphate insecticides.
If the granules are not watered or irrigated, the insecticide material merely
sits on the surface. Ants that contact this particle will be affected but
the ants that walk between particles (insects can easily be repelled by sensing
your insecticide!) will rarely be affected or killed. By watering in the
granules after application you will release the active ingredients into the
soil, where the product is needed for ant control.
Another draw-back to not watering your insecticide ant granules is the effect of
the sun. Modern products that contain Bifenthrin, Fipronil or Deltamethrin
are more stable than older products once exposed to sunlight but they all need
to be irrigated before the sun has a chance to degrade the insecticides.
When granules are broadcast and have to wait for the next rainfall, the
insecticide contained in the granules quickly begin to break down due to
exposure to the sun's rays. In other words, water your granular product
immediately after application if you want to get the best results for the money
spent on the product.
Insecticide Granule Summary
- Broadcasting entire area is more effective for ant control than dumping
piles of granules on individual ant mounds.
- Do not wait for the rain! Water or irrigate area immediately
after application of insecticide granules.
- Keep people and pets off of all treated surfaces until dry.
For the sake of this discussion, only liquid insecticides that are not in
aerosol forms are listed as ant sprays. Aerosols will be mentioned in the aerosol
ant spray section of the article.
When choosing an ant spray it is always better to purchase a concentrate instead
of a ready mixed, ready to use (RTU) type of insecticide. Once an
insecticide concentrate has been mixed with water, it should be used the same
day; for best results it should be used within a couple of hours after
mixing. The reason for this is simple: water is not friendly to
insecticides. If you mix your insecticide concentrate with water and allow
the solution to sit in your sprayer for a few days, the insecticide will not be
as strong as when it was first mixed. You can easily lose 25 to 50 percent
of the product's effectiveness within 24 to 48 hours. Water is an
efficient and necessary tool for delivering pesticides to their targeted areas
but (when not used in a timely manner) water also destroys your
insecticide. For these reasons it is obvious that a ready mixed product
will not be nearly as effective as a solution that you create by mixing
concentrate with water. Indoor products should be specifically labeled for
indoor use, which helps insure that the pesticide is safe to use in the
environment where it is to be sprayed. Indoor ant
sprays should be water-safe for fabrics and flooring and safe for humans and
pets when applied as directed. Outdoor ant sprays
are usually formulated so that the active ingredients and solvents contained in
the pesticide concentrate will safely do the job stated by the label without
burning or harming turf grass, shrubs, ornamentals and most ground covers where
ants might be a problem.
Indoors, an ant spray should be applied to areas where ant trails have
been seen or where ants are suspected of foraging for food or traveling from
their food sources to their hidden nests. Safety first: treat areas where
ants are most likely to come into contact with the material but where people and
pets have the least contact. When it is necessary to spray floors or
baseboards, make sure that children and pets are not in the area during
treatment. Once the treated areas have been allowed to dry, children and
pets can return to the areas.
Most of the ants that contact the surfaces you have treated will die within a
very short time period. A good, professional ant spray insecticide should
give you at least 30 days residual or insecticide activity. Standard
liquid insecticides (usually denoted by the "EC" in their name) will
last about one month on indoor surfaces. Microencapsulated products will
last at least twice as long as an emulsifiable concentrate (EC) when used as
directed. A wettable powder (WP) will last at least three times as long as
an EC. Wettable powders cost a little more than liquid concentrates but
can last as long as three to six months, requiring you to spray less often.
Spraying for ants indoors does not require the same volume of product as does
treating the home for fleas or ticks. Flea and tick pest control requires
that all flooring, carpets, rugs and most furniture be broadcast with
product. When treating for ants you only need to spray areas where
ants hide, forage for food or where they might hide. Suggested areas in a
home include spaces between walls and plumbing lines, beneath false bottoms of
cabinets, baseboards, underneath and behind major appliances such as stoves,
refrigerators and freezers. Your insecticide label will list areas that
the manufacturer suggests for controlling certain pests such as ants. When
treating indoors and outdoors you need to inspect for and treat all possible
entry points, hiding places and paths of travel of your household pests such as
ants. Avoid poor and unsafe practices such as "hosing down" your
countertops or other food prep areas with an ant spray. If this has
happened in your home, thoroughly clean such surfaces with soap and water.
In pest control, a little common sense goes a long way!
Outdoor pest control for ants is broken down into two sections: spraying
the exterior surfaces of the home or building and broadcasting areas around the
Spraying the exterior of the home is simple but very important. Every
possible entry point is to be sprayed. Pay close attention to any tiny
space (as small as a pencil point, as narrow as the thickness of a business
card) where ants or other bugs might enter a home. A pump
type garden sprayer is best for this job, which is the same sprayer you will
use for spraying indoors for ants.
Broadcasting the areas around a home or building will help insure that ant
beds (both visible, above ground and not so visible shallow mounds under mulch,
etc.) are contacted with your spray. The best sprayer for this job is a hose-end
sprayer. There are several such sprayers on the market but you need to
make sure that the sprayer you purchase for insecticide applications is
manufactured with a siphon tube that will draw the insecticide solution from the
sprayer, mixing as it sprays. Either a Gilmour
Dial-A-Mix sprayer or a 20 gallon hose end sprayer will do a good job.
Keep pets and children out of area during treatment. Keep them off of all
treated areas until dry.
The best concentrated products to use for your exterior broadcast ant spray are Talstar
Concentrate or a professional Cypermethrin
product such as Cynoff EC or Demon
EC. Very little product is needed for each application, making these
products safer and more economical to use.
There are hundreds of ant spray products that are available for purchase
and use in and around your home. There are certain active ingredients that
are safer than others (when used as directed) and that do a great job with no
smelly residue. Cypermethrin, Bifenthrin,
Permethrin and Deltamethrin
are active ingredients that are used by professionals for the control of ants,
roaches, spiders and
many other household pests. The most popular concentrates used for ant
pest control are Suspend SC, Demon
EC, Cynoff EC, Demon WP,
Cynoff WP. All of these products are either
odorless or super low odor and are labeled for use indoors and all of these
products are good ant sprays.
Ant Spray Aerosols
Professional aerosols are not usually used in the same manner as over the
counter sprays purchased in grocery stores or home improvement stores. If
a professional aerosol contains a residual insecticide, it should not be used to
broadcast wide surfaces such as food storage cabinets or countertops.
These aerosols should be used for cracks and crevices, only. A crack and
crevice aerosol can be sprayed into hidden areas where ants are likely to be or
known to be but where people and pets do not come into contact with treated
surfaces. CB Invader and CB
AirDevil are good examples of contact insecticide aerosols that are used to
kill ants and other household pests.
When cracks and crevices need to be treated for ants, aerosols or dusts can be
used. Insecticide dusts give better coverage (in
places where ants hide or nest) than aerosol sprays.
Insecticide Dusts for Ant Pest Control
When a home is constantly being invaded by ants or when there is a severe
infestation that cannot be controlled by conventional ant sprays, insecticide
dusts can be a great tool for help in eliminating the problem.
Insecticide dusts should always be used in cracks and crevices, only. Do
not broadcast dusts in open areas to control ants. Ants often enter a
structure through plumbing and electrical lines. They also use these same
routes to travel throughout the home in their search for food or as they scout
an area for a suitable nesting site. Two insecticide dusts that work for
ant control are Delta Dust and Drione
Dust. Plumbing lines and areas
around doors and windows (in wall voids) and the inside of hollow block
construction normally have slight to moderate moisture levels. Plumbing
lines will often have condensation. These moist conditions are detrimental
to insecticide dusts. The exception to this rule is Delta Dust. This
is a water-proof dust that contains Deltamethrin (the same active ingredient
contained in Suspend SC.) Delta Dust is the perfect crack and crevice
product for the control of ants in areas where sprays cannot be used
Many dusts are packaged and shipped in soft containers that can be used to
dispense the material into appropriate areas. Best results are achieved
when a hand bellows duster is used to apply your
dust. A good bellows duster is the Crusader
Duster. This is a small, hand held device that gives you the ability
to safely and easily deliver your insecticide dust behind light switch covers
and electrical outlets, between walls and cabinets, walls and baseboards or
other such cracks, crevices, hiding places and entry points used by ants and
There are four different types of baits used in ant pest control: solid,
granular, liquid and gel. Most types are self explanatory but first we
must clear up a misconception: there is a big difference between an insecticide
granule and a granular ant bait. While granular insecticides are used for
outdoor ant and insect control and must be watered after application, ant baits
are used outdoors and selected areas indoors but are not designed to be watered
or irrigated. Insecticide granules are used as a contact insecticide; ant
baits are designed to be picked up by the foraging worker ants and carried back
to their colony.
The attractant and active ingredients contained in an ant bait are
transferred from the worker ants to the larvae in the ant colony. From
there the materials are shared with or transferred throughout the entire colony.
Adult ants cannot digest solid foods. Solid foods are fed to ant larvae
who can digest solids. The materials are then passed on to the rest of the
ant colony as liquids that are regurgitated by the larvae.
If you will watch an active ant trail, you will notice that there is a line
leading to the food source and another line returning to the colony. Solid
food particles can be seen in the jaws of the workers as they transport the
foods back to the ant bed. Many times you will notice that the workers
returning to the nest are not carrying solids but their bellies seem to be
swollen. This is because they are transporting food in liquid form.
Granular baits can be broadcast around the exterior of buildings and in other
areas where ants are seen as they look for food. These granular products
can be used indoors if placed in attics, crawl spaces, wall voids or other areas
that are not accessible to children and pets. Maxforce
Granular Insect Bait, Advanced Carpenter Ant Bait,
Niban are all examples of professional granular ant
Solid bait stations can be used indoors and outdoors but are best suited for
indoor use. Simply place the stations in areas where ants normally trail
or forage for food. Most professional ant bait stations have a see-through
top for easy inspection. When ants eat all of the bait in any station,
replace it with a new one.
Maxforce and Dual Choice are good
ant bait stations to use.
Gel formulations are also effective for the control of ants and offer a wider
range of places where the bait can be placed. Ant bait gels are normally
packaged in a type of syringe that allows you to put out small spots of bait or
inject the bait into cracks, crevices or entry points where the ants can locate
the bait while foraging. A very popular device made for such baits is the
Ant Cafe. With an Ant Cafe you can make your own, reusable bait
stations. Gourmet Ant Bait Gel and Maxforce Ant Killer Bait Gel are the
best baits in gel formulation.
Liquid baits such as Gourmet Liquid Ant Bait are becoming popular in situations
where ants such as Argentine Ants, Pharaoh Ants or
Fireants constantly re-infest
a home or when the ants prefer a soft bait (gel or liquid.) Gourmet Baits
can be used in the AntPro baiting system and in Ant Cafe bait
Best Ant Killers
This list does not include ant baits.
Best insecticide concentrates for killing ants:
Cypermethrin active ingredient products:
TC Cynoff EC
Non-Repellent Insecticides with Domino Effect on Ants:
Dominion 2L Taurus
Dominion 2L and Taurus SC are both non-repellent insecticides that can be used
around ant baits.
Both are for outdoor use only and both have a domino effect -- ants touching the
product will pass it on to other ants in the colony. Dominion 2L can also
be used on shrubs.
Bifenthrin active ingredient products:
Best insecticide granules for killing ants:
PL (Beware of cheap, generic Bifenthrin granules; active
ingredient should be: Bifenthrin...0.20%)
Best Insecticide Dusts for killing ants:
Delta Dust (use dusts in cracks, crevices -
areas where bugs live or hide but where sprays cannot reach)
When using ant baits, do not spray or dust with a contact insecticide in
the same area! Not only will your bait be contaminated by the insecticides
but the spray or dust will kill worker ants before they have a chance to share
the baited food with the rest of the colony. The whole point of using a
bait is to let the ants do all the work!
A very important part of ant pest control is to correctly identify the ant
species that is your pest. Fireants can be controlled with either contact
insecticides or baits. Carpenter ants can also be controlled with either
type but the new carpenter ant baits are doing the best job. Pharaoh Ants
are best controlled by using a variety of ant baits but do not respond well when
exposed to ant sprays or insecticide dusts.