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Company Awards
Jill Esposito Celebrates 15 Years at Cowleys
We're very happy to announce that our Office/Production Manager Jill Esposito is celebrating her 15 year anniversary at Cowleys! "Jill... [Read more]
Cowleys Selected as The Best of 2020 Farmingdale Award for Pest Control
We are ecstatic to announce that Cowleys has been voted and awarded the Best of 2020 Farmingdale Award for Pest... [Read more]
Cowleys Wins Expertise Award for Best Pest Control Company in Toms River
We are excited to announce that Cowleys Pest Services received the Expertise award for Best Pest Control Company in Toms... [Read more]
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Cowleys Pest Services serving Mercer County, NJ

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Responsible Pest Control Company in Mercer County, NJ

We not only adhere to the highest pest control standards, our goal is to provide you with an excellent experience and service.

Take advantage of our expertise to get rid of unwanted pests or animals in your Mercer County, NJ home.

Pest Services We Offer in Mercer County:

  • Bedbug Control
  • Termite, Flea and Tick Control
  • Rodent Control
  • Ant, Beetle and Spider Control
  • Tick Control Services
  • Animal and Other Pest Control Services Available
  • Expertise and Technical Know-How to Fix Your Pest Problem
  • Financing Available
  • Written Pest and Animal Control Estimates and Inspections
Case Studies From Mercer County
I was recently sent to a home in Princeton, NJ to treat a termite infestation. This particular home was built on a slab foundation. Some types of...
One of my larger residential accounts is a 55+ community in West Windsor, where I perform a weekly commercial service. The property manager informed...
Job Stories From Mercer County, NJ
Thorough vacuuming with HEPA is critical for treating bed bugs

A Cowleys bed bug team was dispatched to a home in Pennington to treat a bed bug infestation. The inspection, the most critical part of any bed bug service, must be thorough and systematic in order to identify those areas in the home where there is an infestation. Hopefully, the infestation is localized, but if the homeowner waits too long, the infestation inevitably spreads throughout the home. We focus on those areas where people sleep and rest — beds, sofas, and recliners — and surrounding areas where they may hide. The bed bugs hide in the nooks and crannies of furniture and surrounding areas waiting for us to sleep or rest, so they can feed on us for their blood meal. Bed bugs are parasites that feed exclusively on blood, preferably that of humans. We look not only for bed bugs in all their stages — eggs, nymphs, and adults — but evidence of bed bug activity such as bed bug casings and droppings.


For those rooms in the home with confirmed bed bug sightings, thorough vacuuming is an important initial step before applying any product applications to those areas of concern. With mattresses and box springs, because we want to avoid applications entirely, vacuuming becomes especially important to remove the sticky bed bug eggs and any live, active bed bugs. It is important to vacuum each and every side of the mattress and boxspring, and over every seam and crack and crevice where the bugs can be hiding. After vacuuming, the mattress and boxspring are encased in a protector to completely seal the furniture and prevent any bed bugs from escaping. All vacuums used for bed bug treatments must contain a HEPA filter and operate with a removable bag system. The vacuum bag must be sealed in plastic and immediately removed from the home. 

In the two-week followup, we will thoroughly re-inspect, and apply additional applications to areas of concern. In our final inspection, two to three weeks later, we make sure the home is completely free of bed bugs, again applying a light chemical application to any areas of concern. After this visit, our 90-day “no bite no sight” warranty goes into effect.

Thorough vacuuming with HEPA is critical for treating bed bugs - Photo 1
Termite scarring in West Windsor shows possible termite infestation

Most of us know that termites eat wood and can destroy a home’s foundation. However, termites eat far more than wood — they will eat anything containing cellulose even if the material has been processed into something that no longer looks like anything that was even once alive. Unlike most insects, termites have the ability to break down cellulose into digestible sugars. There is no shortage of potential “termite food” because cellulose is the most abundant organic material on earth. This highly durable material is used to not only build homes, but also is used in countless home products including carpet, insulation, sheetrock, and fabric. As this homeowner in West  Windsor found out the hard way, even a stack of old cardboard boxes stored in the garage can become infested with termites.

Termites were not only feeding on this old cardboard, but also on the sheetrock along where the boxes were being stored. During my inspection, I observed termite scarring along the surface of the wall that reached almost as high as the window sill. Scarring is evidence of termites that is found just below the surface of the infested material. With this type of damage, the termites haven’t yet invaded the deep core of the material. If there was any good news for this homeowner, it’s that with superficial scarring, the termite-damaged material has not yet lost its structural integrity and is potentially repairable. The bad news, of course, is that termite scarring is proof-positive evidence that a subterranean termite colony has been formed nearby, and that worker termites have zeroed in on the home, which is now a termite food source. 

Even though no active termites were found during the inspection, the safest course of action is to assume that there is an active termite colony that need to be eliminated. As a precautionary measure, we performed a conventional treatment around the garage, in which we injected a liquid into the soil where the termites live and breed. This non-repellent undetectable product is carried back to the nest and transferred to other termites, killing the colony.

In addition, to prevent further termite damage, we installed Sentricon termite bait stations around the home’s perimeter. Sentricon is a subterranean termite colony elimination system that takes advantage of termite biology and behavior to block termites from reaching the home. These bait stations contain cellulose treated with an insect growth regulator that prevents the termites from molting. The worker termites bring the bait back to share with the colony. The affected termites, unable to molt, quickly die. It doesn’t take long for  the colony is eliminated. The Sentricon system has been used for many years, and now protects more than 3 million homes and commercial buildings.  It’s amazingly effective, and there have been plenty of independent research studies to back it up.

Termite scarring in West Windsor shows possible termite infestation - Photo 1
Squirrel control and removal in Trenton, NJ

Like any rodent, squirrels are compelled to chew on things ... and they are chewing all the time. Rodents are the single largest group of mammals with more than 2,000 species. Besides squirrels, those rodents that we are most familiar with are rats, mice, woodchucks (groundhogs), beavers, and those “adorable” rodents like hamsters and gerbils that kids want to keep as pets.  All rodents (from Latin rodere, “to gnaw”) have one thing in common: four long front-most teeth (incisors), two on the upper jaw and two on the lower.  Their constant gnawing creates perpetually sharp chiseled edges. Like all rodents, a squirrel’s front teeth will grow throughout their entire lives, and they do so at a pretty rapid pace. To prevent them from growing too long, squirrels must constantly gnaw in order to file them down. If they didn’t, we would have millions of scary saber-tooth squirrels running around giving us nightmares! 

This behavior doesn't necessarily mean that squirrels are trying to gnaw their way into your house. Cowleys sometimes receives calls from homeowners who are  concerned (or even convinced) that some crazy squirrels are hell-bent on trying to chew their way inside. After investigating, more often than not, we find that the squirrels just using a part of the house as a file to grind down their teeth. Squirrel gnawing is wildlife dentistry! 

In extreme situations like the one where squirrels are really doing a number on the house, wildlife technicians at Cowleys can perform a "free roaming" squirrel trapping service that will reduce the squirrel populations in the immediate vicinity of the home. We’ll trap and safely relocate as many as we can away from your residence.  

As a wildlife technician, I’m often asked if there is an effective squirrel repellent. The most effective one that I’ve found is a spray made of cayenne pepper. There are plenty of recipes online to make a spicy cayenne pepper broth. Some add other food items for good measure that squirrels hate like chopped onions or chopped jalapenos. Another effective squirrel repellent is red fox urine. If you don’t want to go through the time and trouble of collecting it yourself, you can buy it online or at most hardware stores. It should be noted that any of these repellents are a temporary deterrent at best.

Squirrel control and removal in Trenton, NJ - Photo 1
Termites swarm in Hightstown

I was called upon to treat a termite problem at a house in Hightstown. Termite damage often remains hidden until there is extensive damage to the home. However, there are two important earlier signs of a termite infestation that homeowners should be aware of. One is the mud tubes formed by termites so they can move from the nest to the wood food source without being exposed to the elements. the other sign of termite trouble, and by far, the more visible of the two, is termite swarms. This homeowner went through the frightening experience of witnessing a termite swarm take place inside his own home.

What are swarmers? Swarmers (flying termites), also known as winged reproductives, belong to a termite colony along with the workers and the queen. They emerge during the spring to search for mates in order to start a new colony. As soon as they mate, they break off their wings. Since termites are attracted to light, homeowners may find piles of termite wings on windowsills or on countertops near light sources. When a termite colony swarms, thousands of winged termites are potentially released. They may enter homes from the underground colony through cracks in the slab construction. Even though nearly all swarmers will die if they emerge inside a structure, it’s still important to contact a termite pest control professional immediately. An inside swarm like the one experienced by this homeowner is a sure sign that there is a hidden termite infestation on the property.

As part of my inspection, I had to determine where these invading insects had entered the home, so I could treat the soil where the termite nest had formed. At the base of a wall in the laundry room, I found a plumbing clean-out pipe. These pipes are used to access the home’s sewer line to clear out clogs. Right next to the pipe, I discovered a termite mud (shelter) tube in the wall void. That was how these sneaky wood-devouring insects were finding their way into the home!

Now it was time to get rid of these property-destroying insects. To eradicate the termite colony, I first needed to drill a small hole through the laundry room floor to gain access to the ground area where a termite nest was buried below. I then injected a powerful termiticide into the soil underneath the slab to reach the termites using a slab injector that I locked down on top of the hole. This non-repellant application is carried back to the nest by the workers where it will be transferred like a virus to the other termites. Soon, the entire termite colony will be killed. This home will now be protected against termite damage from this underground nest.

Termites swarm in Hightstown - Photo 1
Yellowjackets high up in Princeton, NJ

I was servicing a regular client in Princeton. I went directly to the unit that was having the issue with the yellowjackets. The resident was even seeing the stingers in her unit. I inspected the exterior and quickly found a nest in the roof sheathing by the gutter. I proceeded to treat the opening with a dust insecticide. 

Yellowjackets high up in Princeton, NJ - Photo 1
Hornets Terrorizing Residents in Princeton, NJ Community

During the summer, I perform a weekly servicing for a residential community in Princeton, NJ. The property manager informed me of my top priority for the day: I needed to take care of a hornet’s nest that was terrorizing residents by the swimming pool!  Upon inspection, I immediately saw the problem. The nest had blended in perfectly with the tree and,  even though this was a mature, large nest, it was well hidden unless you were really looking for it. A few residents had already been stung because they didn’t see the nest and made the mistake of venturing too close. Pools tend to be a problem with wasps because they are attracted to the food and sugary sodas.

Often, I can tell the wasp species based on the construction and location of the nest. With this wasp nest removal job, I immediately knew that I was dealing with baldfaced hornets. These “hornets.” contrary to their name, are actually a type of wasp. They are close relatives of yellow jackets and have the same nasty disposition. Baldfaced hornets usually build their nests in hidden protected locations, often under the eaves of buildings or hidden away in some corner of the home, Also, like here, you’ll find baldfaced hornet nests built in or trees where the nest is hidden by leaves and branches. They make their egg-shaped nests out of chewed wood and their saliva, and these nests can grow quite large — approaching the size of a regulation basketball! During the summer, a colony can easily grow to several hundred workers.

These wasps are distinctive white markings on their head and body, and they are social wasps that live in colonies. Social wasps are aggressive and territorial. They are very protective of their nest if they feel threatened, and they won’t hesitate to sting. Each wasp is capable of stinging repeatedly. 

Removing a baldfaced hornet nest is a challenge, and doing it the wrong way or not having the right equipment can easily turn into a medical emergency. These wasps attack in swarms, and aggravating the colony can send hundreds of angry wasps in your direction. Just one wasp sting is painful, but multiple stings are a level of pain that you’ll never forget. I’ve been stung by these even wearing a protective suit. 

It was time to get rid of the nest. First, I treated the entry and exit holes with an aerosol that kills the hornets on contact. I wanted to get rid of the nests' first line of defense — the wasps that are guarding the nest’s exterior. I soaked the nest with the aerosol, to quickly knocks down their population. Even though there may be a few more around, it is now safe enough for me to remove the nest. After removing the nest, I packaged it and took it with me. I did not want any remnants of insect activity since these wasps tend to be attracted to the same area. These wasps had already overstayed their welcome at the pool and I wanted to make sure that these wasps had no attractants that would encourage them to return. 

Hornets Terrorizing Residents in Princeton, NJ Community - Photo 1Hornets Terrorizing Residents in Princeton, NJ Community - Photo 2
Yellowjackets Buzzing About in Apartment Building in Princeton, NJ

One of Cowleys commercial accounts, an apartment building in Princeton, NJ, is serviced by me weekly to handle any pest complaints of tenants or property management. I have treated a panoply of insects there, from occasional invader insects like clothes moths and pantry pests to our “regulars” like carpenter ants & bees and all types of stinging insects. On my to-do list this week was a call from the property manager that a large yellow jacket nest was discovered in a utility room attached to the main apartment building. He had no idea how long the nest had been there or even if it was still an active nest. Since the room was not heated, I suspected that it was an inactive nest. But with yellow jackets, you don’t take any chances!

I cautiously proceeded inside the utility room and looked around to see if there were any yellow jackets hovering about. The coast was clear. There was not a single yellow jacket and given the size of this nest, this small utility room would have been an airport of yellow jackets flying about. 

I used a putty knife to scrape the nest off the wall. This was an exceptionally mature nest. Had it been active, this colony would have had at least a thousand ornery yellow jackets. This was one time I was glad we were in the middle of winter when stinging insects are generally dormant, although on rare occasions we can find an active nest built inside a heated building. After removing the nest, I inspected the outside of the utility room to locate the entry point for these insects. There was a small gap in the siding where a small aluminum box was attached. The box was bent providing enough of an opening for the insects to come and go. I let the property manager know that the box needed to be replaced or at least sealed against the siding. As long as there was a gap, there was a risk of re-infestation — something I would prefer to not deal with once the temperatures start warming!

Yellowjackets Buzzing About in Apartment Building in Princeton, NJ - Photo 1Yellowjackets Buzzing About in Apartment Building in Princeton, NJ - Photo 2
Serving the following Mercer County, NJ zip codes
Trenton 08647, Trenton 08625, Trenton 08608, Trenton 08601, Trenton 08690, Trenton 08644, Trenton 08618, Trenton 08605, Trenton 08628, Trenton 08609, Trenton 08602, Trenton 08691, Trenton 08645, Trenton 08619, Trenton 08606, Trenton 08650, Trenton 08629, Trenton 08610, Trenton 08603, Trenton 08695, Trenton 08646, Trenton 08620, Trenton 08607, Trenton 08666, Trenton 08638, Trenton 08611, Trenton 08604, Lawrence Township 08648, Princeton 08541, Princeton 08542, Princeton 08543, Princeton 08540, Princeton 08544, Princeton Junction 08550, Hightstown 08520, Titusville 08560, Pennington 08534, Hopewell 08525, Windsor 08561