Pest control services SEACOAST NH & SOUTHERN MAINE
For over 60 years, GSC Pest Management has been the trusted choice for residential and commercial pest control in Seacoast NH and Southern Maine. We protect your homes and businesses with Integrated Pest Management (IPM), a strategy that emphasizes prevention and targeted solutions to keep pests away. When treatments are necessary, we prioritize safe and effective methods that minimize environmental impact.
The pest control industry is constantly evolving with new technologies and discoveries. To ensure we provide the best possible service, we embrace these advancements while upholding our core values of dedication and excellence. We are committed to continuous learning and improvement, so you can trust us to handle any pest challenge.
Whether you need immediate help with an infestation or proactive prevention, GSC Pest Management is here for you. Call us today to discover how we can protect your home or business from pests.

Our comprehensive suite of pest control services include:
Services
Servicing the Seacoast NH areas and Southern Maine.
BARRIER TREATMENTS
A highly effective and efficient way to protect your home from unwanted invaders, including carpenter ants, pavement ants, wasps, hornets, earwigs, spiders, springtails, stink bugs and more (some limitations to the control of flying insects apply). It puts up a wall of defense and protects any structures that might otherwise be vulnerable to pest infestation. By receiving two barrier treatments a year, one in the spring and one in the fall, pests can be effectively controlled for the entirety of their active season.
GSC offers a proactive pest control program called the Say NO to Bugs (SNOB) Program for qualifying properties that receive the spring and fall barrier treatments. Subject properties can benefit from stress free no charge follow up services for the whole year. Additionally, qualified SNOB customers receive a
20% discount for treatments to control yellow jackets and bald face hornet nests that may develop on your home.
Barrier treatments consist of a broad base application along the exterior foundation of your home, paying special attention to pest vulnerable areas such as under decks, additions, or areas with wood-soil contact. The treatment is applied 3 feet up and 3 feet out from where the foundation meets the ground. A barrier treatment provides up to 3 months of protection from invasive insects, at which point the
chemical naturally begins to breakdown.
Barrier treatments are offered for commercial properties, residential homes, condominiums, and multi-unit apartment buildings.
Barrier treatments do not provide control for rodents, termites, fleas, bed bugs, roaches, and stored food pests, please inquire for more.
YARD TREATMENT
Yard treatments are effective at controlling mosquito and tick activity around the structure or recreation area. By applying a residual adulticide to the lawn and woodline where mosquitoes like to rest, the day-time nuisance from mosquitoes can be effectively controlled for 3-4 weeks. After dusk and before dawn mosquitoes fly in from nearby breeding sights without contacting the treated area and cannot be as
effectively controlled. Ticks do not fly and are slow to recolonize a treated area therefore one treatment in the spring and another in the early fall will just about eliminate tick activity.
Contact us about setting up monthly or seasonal services.
WASP/HORNET TREATMENT
Wasps, yellow jackets, and bald faced hornets emerge every year in the late spring and begin creating an entirely new nest from scratch. Unfortunately, the locations of their nests are often problematic if they are close to human activity. By July these nests will have already become well established and have grown to about the size of a softball. This is a good time inspect your property for any nests as they will be noticeably active and are still at a manageable level. Common places to look would be eaves of your home, rock walls, under decks, by window trim, electrical meters, nearby trees, propane tank covers, mailboxes, and light posts.
In many cases with yellow jackets, they like to make their nests inside small openings of eaves or siding. This can make them increasingly hard to spot as you will only be able to see them as they enter and leave from that opening, and increasingly more difficult to treat. Please contact GSC to provide safe and
effective treatment options.
Before attempting to treat a nest yourself please read the following,
- If you see Yellow Jackets going in and out of a small opening DO NOT seal them in with caulking or spray foam. This will often force them to find another way out which typically includes around light fixtures, windows, or even through drywall.
- If you hear a consistent crackling/chewing accompanied with a wet spot/soft spot in a ceiling or wall, this could be an indication of a Yellow Jacket nest. The best thing to do is to tape over the area and call GSC for best treatment options.
- Wasp and hornet nests are not active at night, so this can be a good time to treat if you do not possess a full protective bee suit. Use red light to help you to see where you are treating, wasps and hornets cannot see red light, and always where proper PPE. (Personal Protective Equipment)
RODENT CONTROL
Every rodent control program begins with an initial inspection for rodent activity. Our technicians inspect common problem areas including attics, basements, garages, and unfinished areas where rodents are likely to be found. Once the rodent activity level is determined, we set up a combination of traps and baits to monitor and control the rodent population. The next step in the process is exclusion. Our technicians inspect around the foundation of the home pinpointing any areas rodents may be gaining entry and seal them shut. GSC Pest
Management does only minor exclusion tasks, for anything requiring structural repairs we will recommend finding a local contractor.
After the initial service we will typically recommend a follow up service in 1 month to properly gauge rodent activity levels. Once that is determined we can set up a control plan which flexes with your needs and your budget.
Ask us about our Rodent Flex and Seasonal Programs
ROACH CONTROL
Cockroaches are insects that have adapted well to the human environment. Our homes and restaurants provide warmth, hiding places, and a multitude of food sources. This pest is most often introduced by hitch hiking onto the items we bring into our homes like grocery bags or carboard boxes or even
appliances. It is almost impossible to identify the source of how they came to be in your home, but what is important is the early identification and treatment of any roach activity. This pest is secretive by nature and therefore can be hard to identify early on. Common areas to check initially are by appliances that give off heat or have a build up of food grease or residue such as refrigerators, stoves, toasters, or microwaves.
If you believe you may have an active roach issue, call GSC to set up an inspection.
FABRIC PESTS
Fabric pests such as Indian Meal Moths and Carpet beetles can cause extensive damage to any items that contain natural fibers. This includes any items made from wool, fur, silk, feathers, or leather. They do not feed on cellulosic fibers (fibers derived from plants) such as cotton or linen, and synthetic fibers such as polyester or nylon. These pests are cryptic by nature, preferring to feed in dark undisturbed
areas, and can often develop into serious infestations before ever being detected. Identifying all possible food sources is key to the control and elimination of these pests.
Common infested items include; Persian or wool rugs, animal trophies, sweaters, fur coats, blankets, decorative items, and down pillows or comforters.
FLEA CONTROL
Flea infestations are most commonly introduced through the pet (but not always). They can be picked up at pet groomers, dog kennels, or even by walking through yards. Wild animals such as racoons and rabbits that might be nesting in the area can “seed” fleas into an environment, which can then affect an
untreated pet.
The success of any flea control program starts with the pet. Before any treatment plan can begin, the pet must be treated for fleas. Thankfully, today there are multiple options available for treatment, whether it be flea collars, pills, or shampoo. With these new innovations in flea control, instances and
outbreaks have dropped considerably. In addition to treating the pet the pet owner should also wash pet bedding and VACUUM thoroughly, especially in areas where pets rest or sleep. By vacuuming you are removing many of the flea eggs and larvae before they develop in your home. Pay special attention to carpets, gaps along wood flooring, beneath furniture, and cushions.
Depending on the extent of the problem and how long it has been going on for, treatments of the home may still be necessary for more immediate remediation.
BED BUG CONTROL
Bed bugs have made a major comeback not just in the U.S. but worldwide. This can be attributed to a combination of factors including the restriction of potent pesticides, and an increase in global travel. Bed bugs are often transported in luggage, furniture, and belongings. Even new furniture is not invulnerable to bed bug infestation. Oftentimes this furniture is delivered on trucks that may contain other infested items which can then spread to new items. Unlike cockroaches and flies that feed on filth, there is often no relationship between bed bugs and cleanliness, anyone can be subjected to a bed bug infestation. Although bed bugs are not linked to transmitting any diseases, they do cause a considerable
amount of emotional stress.
When searching for signs of a bed bug infestation, begin close to the bed or couches, anywhere you spend an extended period of time. Bed Bugs like to live within 5-20 feet of their food source, especially during the early stages of an infestation. Box springs, bed frames, mattresses and couches are the primary areas to look when trying to identify an infestation. Pulling back on folds or seams along the bedding or cushions will often reveal their hiding areas.
To affectively control and eliminate a bed bug infestation will require a high degree of communication and cooperation. Treatment alone will not eliminate a bed bug infestation.
Check out this video for more information about bed bugs
FLY CONTROL
There a many different types of flies, each with their own unique life cycles and potential food sources. Depending on the specie the source could be from a drain, an animal carcass, or a flowerpot just to list a few.
STORED PRODUCT FABRIC PESTS
There are several types of stored product pests that are able to infest different types of whole grains and processed foods. The first signs of an infestation are typically the emerging adults the appear crawling out of cabinets or flying across the kitchen. While removing the adults is helpful, this problem
will not go away until you find the food source. Proper identification of the pest will help to provide you with a hint as to what this food source might be. Indian meal moths prefer course flours and corn meal, but can also be found in dried fruits, chocolate, dried dog food, and even bird seed. While drugstore beetles have a much broader diet and can infest almost any household food or spice, often found in bread or flour but can also be found in such spices as paprika or red pepper.
The key to preventing future infestations is proper food storage. Items should be sealed in airtight plastic containers or jars; cardboard and paper will not effectively keep out stored food pests.
TERMITE TREATMENTS AND MONITORING
Termites can be the cause of major concern for homeowners, often termite activity can go on for years before it is detected. The first signs typically noticed by homeowners is the swarming winged alates in the early spring. This is also the cause for a lot of misidentifications. Carpenter ants also have a similar swarming pattern in the early spring, so it is important to get proper identification and a second opinion before any treatments are scheduled.
For the control of termites, GSC offers both liquid applications and baiting systems, with annual renewal inspections. Treatment options vary by structure and environmental factors in your area.
To reduce the chances of a termite infestation it is important to;
- Eliminate all would soil contact (at least 6 inches of separation)
- Pull back mulch from the structure
- Not allow moisture to accumulate near the foundation
- Reduce moisture and humidity in crawlspaces
- Keep any stored firewood off the ground and away from the structure
SPOT TREATMENTS
When it comes to the control for minor pest activity, a full service program or treatment of the entire structure may not be necessary or warranted. Spot treatments are a one time localized application for the control of a specific pest. Follow up treatments may be necessary.
WDI INSPECTIONS
Inspection of a home or property for the presence of wood destroying insects (WDI). GSC Pest Management does not perform home inspections that are for the purchase or sale of a home (no realtors). GSC Pest Management will do the inspection if it is for a refinance or other various reasons.