Integrated Pest Management, IPM for short, is a philosophy that stresses the use of all methods of pest control with the use of chemical treatments as just one important tool in the kit, and perhaps not the most important tool, at that.
A key toward reducing the amount of pesticides used in our environment is through pest prevention. Exclusion, or ‘build-out’ is a mechanical control method for keeping pests out of areas they are not wanted. It is extremely green.
With some pests, like rats, mice, or squirrels, if you do not perform exclusion, you are almost certain of future infestations.
In this home I was dealing, once again, with squirrels in the walls, and squirrels in the roof, or attic. Another not so typical case of squirrel removal. First step, live trap the squirrels, and then work to keep future squirrels from moving in.
Here is one more unusual area for rat, squirrel, mouse exclusion. The chimney of this home has settled in such a way that it has separated from the home. A mason or chimney expert may be able to anchor the chimney and keep it from separating any further.
I was asked to rodent proof the gap, post haste. After discarding the use of flashing, since the chimney incorporated rock and brick, making the surface area highly irregular, I settled on heavy duty 1/4 inch metal screen.
The owners of this home were worried about cost factors so
we skipped a couple of steps that might have made this application more
secure. I recommended but was over ruled,
the use of high quality, high strength mortar, to fill in the screen, and to
make it adhere more strongly to the chimney. Instead I used some ready made concrete patch that should work. It will dry darker and more similar in color to the chimney in time.
Years and years of experience have made us experts in getting rid of rodents. Regardless of how you feel about rats, mice, and squirrels, in general, no one wants them inside their homes, chewing on electrical wiring, making huge messes in their attics and crawlspaces.
You can find more info on rodent control, pest prevention, and our company at www.safepest.org. Feel free to email us with questions service@safepest.org, or call us at 1-877-743-1896
We have two types of ants in the Northwest which we classify as ‘moisture ants.’ Each of these ants belongs
to a different ant genus which may have one or more species which look similar
and / or act in a similar manner. Ants
of the genus Lasius, sometimes referred to as cornfield ants, and ants of the
genus Acanthomyops, sometimes referred to as the larger yellow ant. These
ants have a few things in common, but mainly, their penchant for nesting in wet decaying wood.
While other ants will nest in wood, wet wood, and even wet decaying
wood. Somehow these two different types of ants got bundled together
because they are both fairly small and when they infest buildings they often
infest the same areas.
Both of these ants commonly infest trees, stumps, fence posts, and any
other wood in constant direct or close contact with the soil. Soil holds moisture and these ants will not typically infest wood which does not have high
moisture content, although on rare occasions they have been known to bring
moisture to wood—a process known as ‘farming.’
Other materials besides soil will hold moisture, contribute to wood rot,
and provide nesting incentives to these ants. Beauty bark, wood chips, leaf and other plant debris,
sand and gravel all hold moisture very well. Additionally, many common construction materials
exposed to moisture and in contact with wood will lead to moisture problems and
ant infestations.
While these ants are often noted around the exterior of the home where
siding, or other wood of the structure meets the soil, they can also be found
under homes where wood of the structure meets the soil of the sub area, where
wood left over from the building process was left by the builder, or where tree
stumps or tree root systems where not completely removed prior to building.
On rare occasions, nests
of these ants can occur under the concrete floor in basements or in
other types of slab homes. Workers and even the winged swarmers will
sometimes come up around the edges of the slab along the interior perimeter of
the home, especially if the builder did not clear the wooden form boards used
to frame the foundation prior to pouring the concrete which became the slab
floor.
These ants can also be
found in nests occurring much higher in a building, around windows that sweat,
gutters that leak, pin hole leaks in plumbing lines, leaky bathrooms shower
enclosures, faulty roof flashing, and even under roofing materials if moisture is
consistently present.
Just like Carpenter
ants, mature nests of Moisture ants will produce winger reproductives after
their nests are well established.
Swarms, or ‘mating flights,’
typically occur in late summer around August.
The most important
control aspect for moisture ants is an inspection
by a qualified pest control professional.
They should be able to help you pinpoint moisture causes and outline possible
steps to reduce the moisture to levels that are no longer attractive to these
ants.
A treatment may be
recommended, especially if there are a lot of ants, if it will take a little
while before all contributing moisture problems can be addressed, in those
situations where it just is not economically feasible to eliminate all the
moisture problems, or where consumers have a concern about future rot problems.
These ants can and often
do tunnel and forage below ground on subterranean insects and insect
secretions. A perimeter band treatment of your structure may not have any
effect on these ants; it may not control them or prevent them from nesting, concerns
about these ants should be discussed with your pest control provider.
It is important to note
that in many areas where these insects are found, rot is found as well. Too
often when contractors perform repair work to replace wood damaged by rot fungus and moisture ant infestations they do
not remove and replace enough wood. Rot
damaged wood is often cut out at the point where wood is discolored or
obviously soft. Workers often attach new
replacement wood right up against rot damaged wood.
Rot extends inside the
wood several feet beyond the point where it is visibly soft or discolored. It is still there, a living organism, and if
there is any future moisture in the repair area it will continue to grow and cause damage.
While using chemically
treated rot resistant wood may slow the spread of rot in an area of repair, it
has been our experience that few, if any, contractors are installing these
replacement materials properly.
According to the manufacturers, end-cut solution should be applied at
every fresh cut, at every crack or split, and at every nail or screw
attachment. Additionally, any chemically
treated replacement material specifically used for rot repair in any area of
possible future moisture should be rated for direct ground contact. Too many contractors use replacement materials that
are more suitable for decking than for rot repair.
Treatment of all wood in
the area of repair with a material such as Tim-bor will help to prevent the
future spread of rot, will help kill moisture ants, and is strongly recommended. Tim-bor, Bora-care, and other preparations
containing borate based fungicides can provide long term control and Tim-bor
in particular, as a naturally occurring inorganic mineral compound should be
considered a very green approach to rot and insect control.
Each nest may have hundreds, to hundreds of
thousands of ants.
The ‘main’ nest site is always located
in an area that will never freeze or dry out. Typical
‘main’ nest sites are trees and stumps. Ants can retreat to lower levels of the tree or
stump to avoid temperature extremes.
Satellite nests can be located anywhere, in other trees or stumps, and
in every conceivable construction component, void space, and at every moisture
level (including hot and dry).
The ‘main’ nest
site for commonly encountered Northwest species is rarely found inside a home
(5% or less). If you do not have a long term major rot problem in
your home—you do not have a ‘main’ nest site. Satellite nests, which can also
be found outside, are typically the nest type found in a home. Many structures which have satellite nests
will have more than one. Even after
careful inspection, most nest sites in a structure cannot be pinpointed
exactly. Nests can be in crawlspaces,
interior or exterior walls, between floors in multi-level homes, in between the
layers of flooring in any home, and in any combination thereof. There are far too many possible areas to
mention.
Carpenter ants do not ‘eat’ wood. They eat other insects – they tunnel
in wood and other building products, especially the solid core
insulation, found most often in certain type of roof configurations, and under
fake stucco facades, thereby causing damage. While not as extensive as termite damage, it
can sometimes cost many thousands of dollars to repair carpenter ant
damage. Damage, if occurring, may be
happening in areas which are not visible or available for an inspection.
Scent trails connect the ants to feeding areas.
They also connect all the nests in a colony, including the ants in your
building with the ants in the main nest site. These trails are
comprised of formic acid and other chemicals and may take as much as ten years
to fade. Even
after your nest is eradicated these trails will act as flashing neon signs
pointing to your structure.
Related ants from other nests, especially the
‘main’ nest site, will follow these scent trails back and
re-infest previous nest sites, including the sites in your
structure. Carpenter ants have two egg laying cycles every year and bring more
ants to all the nesting sites soon after these cycles complete. Winged ants are reproductives and indicate the
main nest site is at least 5 years old and well established.
Conditions which
made your home attractive for the ants to begin with are usually still present
after a treatment. This makes
a home which has had ants a prime candidate for re-infestation.
Ants which show
up early in the year and then vanish, do not leave a home, they just stop
looking for food inside.
Damage, if occurring, does not stop when
ant sightings cease. They will only look food inside a home in
the late winter or early spring in this manner.
This is a sure sign of an active infestation. As soon as their normal exterior food sources
are available they will almost always stop showing up in your living space.
There is no such thing as a ‘baby’ ant. Ants are the adult stage of the insect. Carpenter ants can be told from other ants
based on how they are shaped. They can
come in different sizes and colors. We
have 2 or 3 very common species in the northwest and at least 10 less common
species.
Carpenter ants
are not the only wood destroying ant in the Northwest. Moisture ants and Velvety tree ants also
destroy wood. Anyone who sells a home in
our state is required by law to disclose any infestations of vermin, including Carpenter ants when
they sell their home. Being able to show
a professional response by a well trained and qualified pest control expert
goes a long way toward giving prospective buyers peace of mind.
There is a tremendous population of rats and mice in our area. One of the main reasons we have so many rodents is our mild climate. Our winters are not harsh and there is easy availability of water throughout the year.
As a society, we preserve green spaces, we install landscape materials that offer ideal nesting areas, such as rockeries, and we often surround our homes and work places with bushes, shrubs, and dense ground cover. This allows the rodents to flourish on the outside for ten or eleven months each year. We attach vines to our buildings and let bushes and trees grow up onto our eaves and roof surfaces which allow rodents easy access to our roof tops.
A typical rodent related inspection will also turn up a
number of ground level access areas as well:
broken vents, ill fitting sub area access doors, gaps around utility
lines, uncapped drain lines, and much more.
The number one reason rodents infest buildings has nothing
do with available food or sanitation; it is the availability of access. Rats will travel several city blocks from
their nests to find food. Mice need a
great deal less food and less water and can usually find their food sources
closer. House mice, for instance like to
live within ten to twenty feet from their food, but will also travel farther.
Where do they find food? Nuts, berries, seeds of all kinds, insects, and of course the vast banquet that humans provide. In any one neighborhood they will find at least a couple of bird feeders, perhaps some improperly stored bird seed, typically one or more dog food dishes where someone thoughtfully fills full of way more food than their dog can eat and then leaves outside all day and / or all night. They will eat dog feces, and let’s not forget garbage cans with ill fitting lids, or compost piles.
Anyone can set out a trap or throw around rat poison. Trained professional rodent control experts know how to set out the trap properly to increase the chances of the trap actually catching rodents. They know what type of attractant to use on the trap and how much (non-professionals almost always use about ten times too much). There is a science to trapping, including not just trap placement but pre-baiting and multiple trap sets.
There is a tremendous amount of liability when it comes to putting out rat or mouse bait (rat poison). State law requires that all rodenticides be placed in special tamper resistant stations that make it difficult for children, pets, and non-target animals to access the poison. Poisoning your neighbor’s cherished family pet can invite huge law suits.
The most important and professional rodent control measure
that can be offered by a service company however, is a full rodent inspection
and exclusion report. If a building is
not rodent proofed it may not be possible to control the existing rodent
population, and the rodents will always come back.
This type of work is referred to as IPM or integrated pest management. It can be thought of as pest prevention if it is performed before pests move in or before pests move back in. WHy is this type of work necessary?
Rodents urinate wherever they go. Their urine contains and great number of pheromones which are chemical markers that tell other rodents such information as: the sex, social status, stress status, and dietary status of the rodent who urinated. It is like a neon light flashing a huge vacancy sign that can be read by any passing future rodent.
Rodents will sometimes become ‘food specific’. If rodents have been feeding on one food source for a period of time they may ignore other foods, including the attractants on traps, or the attractants used in poison baits. As long as they have access to their preferred food source it may not be possible to control a given rodent population.
These are two very good reasons to make sure that your home is rodent proofed. Rodent proofing is both an art and a science. Most experienced contractors, handymen, and otherwise skilled homeowners totally botch rodent proofing. Rats can enter a building through a gap the size of a quarter; mice need only an opening the size of a dime. They easily chew through expanding foam and soft woods like cedar. Steel wool, by itself, is not usually a good rodent proofing material either.
In the coming weeks I will be adding more posts, including
blogs with step by step instructions on how to perform rodent exclusion
properly. Rodent proofing done early can save you thousands of dollars as it is becoming increasingly common for purchasers to require rodent clean-up and sanitation methods prior to buying homes and other real estate. Replacing all the insulation under a home can be very expensive.
Stayed tuned. In the meantime, if you have a rodent situation that you need help with – give us a call!