- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. has provided licensed pest management to Frederick County homeowners since 2011, operating under Maryland Department of Agriculture license #30263 with over 75 years of combined pest management experience across the team. Owner Troy Yowell handles the majority of service calls personally — when you call, you’re talking to the person who will do the work, not a dispatcher. Pest Shield has earned Best of Frederick MD Pest Control (2021) and Best of Nextdoor for four consecutive years (2021–2024), with 338+ five-star reviews across Google and HomeAdvisor.
How it works
Four steps. No surprises. Same answer whether it's your first call or your tenth.
You reach Troy or someone on his team directly. No call center, no dispatcher, no routing.
Same-day or next-day for most calls. Emergency stinging-insect situations and real-estate WDI deadlines get priority.
We identify the species, locate entry points, and find the source — not just the symptom.
Written recommendation, straightforward pricing, no obligation. If you don't need treatment, we'll tell you.
Cockroaches are rarely a single-roach problem. By the time you see one in your kitchen or bathroom, there’s a good chance a much larger population is already established in wall voids, under appliances, or in the damp lower levels of your home. Brunswick’s older housing stock, the humidity corridor created by the Potomac River valley, and proximity to agricultural land create the moisture and harborage conditions that cockroaches exploit year-round.
Species identification matters because it tells you where the infestation is centered and how it got there. Brunswick homes commonly host three species, each with a distinct pattern of entry and harborage.
| Species | Where You’ll Find Them | How They Get In |
|---|---|---|
| German cockroach (Blattella germanica) | Kitchen and bathrooms — near warmth, moisture, and food sources. Behind refrigerators, under stoves, inside cabinet hinges. | Introduced via grocery bags, cardboard boxes, secondhand appliances, or infested multi-unit buildings. Rarely enter from outdoors. |
| American cockroach (Periplaneta americana) | Basements, crawl spaces, utility rooms, floor drains. Prefer warm, damp areas with organic debris. | Enter through foundation gaps, utility penetrations, floor drains, and crawl space vents — especially in older Brunswick homes with more structural entry points. |
| Oriental cockroach (Blatta orientalis) | Damp lower levels — basements, crawl spaces, under sinks, near sump pumps. Tolerate cooler temperatures than other species. | Enter through gaps at ground level, floor drains, and utility penetrations. The Potomac River valley’s humidity makes Brunswick’s lower-level spaces particularly hospitable. |
One treatment that knocks back visible cockroaches without addressing the harborage conditions and entry points that sustain the population will produce temporary results. German cockroaches in particular reproduce rapidly — a single female and her offspring can produce thousands of descendants in a year under favorable conditions. Addressing the infestation fully means identifying the species, locating the harborage, and maintaining pressure on the population through follow-up treatment.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
moved in to a new house and discovered ants. Another company couldn’t get rid of them. Troy got rid of ants very quickly – haven’t seen them since he began treating the house.
Melissa Evans · April 2015 Read on HomeAdvisor →
Pest Shield is a great company to work with. Troy is very knowledgeable and won’t do services you don’t need. He does a thorough job the first time so you don’t have to keep calling him back.
Jim Frizen · April 2020 Read on Google →
Pest Shield has been absolutely wonderful! We had an issue with mice, and Pest Shield was the ONLY company we could get to come out to our house on the same day which happened to be a Sunday. The technician, Troy, was extremely knowledgeable, friendly, and honest. He saved my husband and I a lot of money. Most companies would have taken advantage of the situation. It’s been 30 days and we have not had any more issues. We were so satisfied with the company and the services we received, that we also signed up for the pest (bugs) control service last month. Since then, we have not seen any bugs (including those nasty centipedes and camel crickets)!!! Thank you so much, Pest Shield!!!!!
Myah Moxley · February 2015 Read on HomeAdvisor →
General pest & rodent control
Every cockroach job starts with a free property inspection — no treatment recommendation before Pest Shield has seen the property. Troy or a technician identifies the species present, locates harborage areas, assesses entry points, and evaluates the conditions sustaining the infestation. If Jeffrey Allwine’s entomological expertise is needed for species-level confirmation, samples go to him directly. The inspection drives the treatment plan — not a standard package applied to every home.
Pest Shield’s approach is exterior-first: the goal is to stop cockroaches from establishing inside the home by treating the perimeter and entry points, keeping chemical application out of living spaces when possible. For cockroach infestations already established indoors, targeted interior treatment is applied where the infestation is centered — under appliances, in cabinet voids, near moisture sources — rather than broad interior spraying. This targeted methodology reflects how cockroach control actually works: disrupting harborage and eliminating the population at its source, not just treating surfaces where roaches travel.
The Standard Care Plan exists because cockroach pressure in Brunswick doesn’t end after one treatment. The conditions that brought them in — moisture, entry points, seasonal pressure from surrounding agricultural land — don’t change after a single visit. The 60-day cadence maintains consistent pressure on the population and catches re-entry before a new infestation establishes. If you see activity between scheduled visits, Pest Shield comes back at no charge.
Same-day and next-day scheduling is standard for active infestations — call (301) 829-0060 and you’ll speak directly with Troy or a technician, not a call center. Pest Shield uses EPA-approved products throughout, with nontoxic bio-pesticide options available for homes with children, pets, or family members with sensitivities. Troy will tell you exactly what’s being applied and what precautions apply to your household.
Owner
Founded Pest Shield in 2011 after years as a pest management contractor on U.S. military bases in Iraq and Afghanistan. Around 35 years in pest management. Personally handles or leads the majority of service calls.
Pest Management Specialist
Field technician handling residential and commercial service calls across Frederick, Carroll, and Montgomery counties.
Pest Management Specialist
Field technician handling residential and commercial service calls across the service area.
Our Entomologist
Consulting entomologist on species identification, conducive conditions, and treatment strategy for difficult cases.
Brunswick sits at the western edge of Frederick County along the Potomac River, bordered by the C&O Canal National Historical Park to the south and agricultural land to the north and west. US-340 connects Brunswick to Frederick and into Virginia, and the MARC Brunswick Line makes it a commuter corridor. The town’s housing stock skews older — much of the historic core predates modern construction standards, meaning more foundation gaps, older utility penetrations, and fewer sealed entry points than newer subdivisions.
The Potomac River valley creates a persistent humidity corridor that elevates moisture levels in Brunswick’s basements and crawl spaces year-round — exactly the conditions Oriental and American cockroaches seek out. Agricultural land surrounding the town can push cockroach populations toward residential structures when field conditions change seasonally. Pest Shield serves Brunswick and the broader Frederick County area with comprehensive pest management in Brunswick, and Troy’s familiarity with the region’s older housing stock and specific pest pressures informs every inspection.
For most cockroach infestations, a single treatment reduces visible activity but doesn’t eliminate the underlying pressure that brought roaches in. German cockroaches in particular reproduce quickly enough that any survivors or newly hatched egg cases can reestablish a population within weeks. Pest Shield pairs initial treatment with the Standard Care Plan — treatment every 60 days, a 100% effective guarantee, and free retreatment between scheduled visits if activity reappears. The 60-day cadence is more frequent than the industry-standard quarterly schedule, and it’s designed specifically to interrupt cockroach life cycles before a new infestation can establish. Troy will tell you honestly whether ongoing service makes sense for your situation — if a one-time treatment is genuinely sufficient, he’ll say so.
Yes. Pest Shield uses EPA-approved products and offers nontoxic bio-pesticide options for homes with children, pets, or family members with sensitivities. The exterior-first treatment approach keeps chemical application out of living spaces when possible — interior treatment is targeted to harborage sites rather than broadly applied throughout the home. Troy will explain exactly what’s being used, where it’s being applied, and any precautions specific to your household before treatment begins.
Same-day and next-day scheduling is standard for active infestations. Call (301) 829-0060 and you’ll speak directly with Troy or a technician — not a dispatcher or call center. Pest Shield serves Brunswick and the broader Frederick County area, and Troy has been documented arriving the same day for urgent pest situations, including on Sundays at no extra charge. The free inspection is included with every new service relationship, so there’s no cost to have someone come out and assess what you’re dealing with.
Not for scheduled treatments under the Standard Care Plan. Pest Shield’s exterior-first approach means the majority of ongoing treatment is applied to the perimeter of your home, and you don’t need to be present for that work. For the initial inspection and first treatment — particularly when interior harborage sites need to be accessed — it helps to have someone available to walk through the property. Troy will confirm what’s needed when you schedule.
Species identification matters significantly for treatment. German cockroaches (Blattella germanica) are the most common indoor species and almost never enter from outdoors — they’re introduced via infested items and establish in kitchens and bathrooms near warmth and moisture. American cockroaches (Periplaneta americana) and Oriental cockroaches (Blatta orientalis) typically enter from outside through foundation gaps, floor drains, and utility penetrations — wait, that link is incorrect. Let me redo this.
