- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. has provided stink bug treatment and year-round pest protection to Frederick County homeowners since 2011, operating under Maryland Department of Agriculture license MDA #30263. Owner Troy Yowell brings approximately 35 years of pest management experience to every service call, and the company’s on-staff entomologist, Jeffrey Allwine, supports accurate pest identification when field diagnosis needs a second look. Pest Shield has earned Best of Nextdoor recognition four consecutive years (2021–2024) and Best of Frederick MD Pest Control in 2021, 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.
The brown marmorated stink bug (Halyomorpha halys) follows a predictable seasonal pattern — and Emmitsburg’s older housing stock, agricultural surroundings, and proximity to the Catoctin Mountain foothills put local homes squarely in the path of it. Understanding the cycle is the first step toward breaking it.
Emmitsburg’s agricultural landscape amplifies the problem. Stink bugs feed heavily on crops and fruit trees through summer, and when harvest ends and temperatures drop, the surrounding fields and orchards push large populations toward nearby structures. Homes at the rural edge of town — particularly those with wooded lots or adjacent to farmland — face higher pressure than homes in more developed areas. One-time removal of visible bugs doesn’t address the overwintering population already inside the structure, which is why the problem tends to repeat year after year without a treatment approach that targets the entry cycle itself.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
Pavement ants raided our basement this morning and I was desperate for someone to come today! After calling around and being told they recommended a quarterly service before even seeing our problem and couldn’t come out until Thursday(!!!) I called pest shield and they came this morning. He explained the problem and found the source. He sprayed the area and around the house and doesn’t think we need a service plan. He is also knowledgeable about mosquitoes. Call them!!
Elise Richard · June 2024 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 →
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 →
General pest & rodent control
Pest Shield’s approach to stink bug control starts at the exterior — treating the perimeter before bugs breach the building envelope, rather than chasing them through living spaces after they’re already inside. Troy Yowell inspects the property to identify the primary entry points and pressure zones: siding gaps, soffit and attic vent areas, window and door frames, and any structural openings that give overwintering bugs a path in. Treatment targets these zones directly, keeping product outside the home and out of the living space where your family spends time.
The exterior-first methodology matters for stink bugs specifically because the problem is an entry problem. Treating inside the home addresses symptoms; treating the perimeter addresses the source. Pest Shield’s complete exterior treatment focus — confirmed across hundreds of service visits — is designed to intercept bugs before they establish in wall voids, not after.
Because stink bug pressure in Emmitsburg spans a long seasonal window — fall entry through spring emergence — a single treatment rarely holds through the full cycle. Pest Shield’s Standard Care Plan is built for exactly this pattern:
The 60-day cadence is timed to Maryland’s seasonal pest cycles. For stink bugs, that means active coverage through the fall entry window and again through the late-winter and spring emergence period — the two points in the cycle where treatment has the most impact. If activity reappears between scheduled visits, Pest Shield returns at no additional charge. After treatment, most customers see a significant reduction in visible stink bug activity within the first service cycle. The Standard Care Plan is offered when it genuinely fits the situation — Troy will tell you directly if a one-time treatment is likely to be sufficient for your property.
All products used are EPA-approved. Pest Shield’s exterior-first approach keeps treatment outside the living space by design, and nontoxic options are available for households with children and pets.
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.
Emmitsburg sits at the northern tip of Frederick County along US-15, bordered by the Catoctin Mountain foothills to the west and open agricultural land in nearly every direction. The town is within easy reach of Thurmont, Taneytown, and Gettysburg, PA, and Pest Shield serves the full northern Frederick County corridor from its Mt. Airy base.
The combination of surrounding farmland and older housing stock makes Emmitsburg one of the higher-pressure stink bug environments in the region. Crops and orchards push large populations toward structures when the season ends, and the area’s historic farmhouses and older homes — with less airtight building envelopes than newer construction — give overwintering bugs more ways in. Annual treatment is not optional here; it’s the cycle. Pest control in Emmitsburg requires a year-round strategy that accounts for both the fall entry window and the spring emergence period.
The odor is a chemical defense — brown marmorated stink bugs release a compound from glands in their thorax when threatened, crushed, or disturbed. Vacuuming them is one of the most common mistakes: a standard vacuum spreads the smell through the exhaust and can leave residue inside the machine. The right approach is to avoid disturbing bugs you find inside, seal the entry points they’re using, and treat the exterior perimeter to stop the next wave before it gets in — which is what professional treatment addresses.
Professional exterior perimeter treatment significantly reduces stink bug entry — but stink bugs are an annual overwintering pest, which means pressure returns each fall as new populations seek shelter. A single treatment applied at the right time can knock down entry substantially for that season. The reason Pest Shield’s Standard Care Plan (60-day cadence) tends to outperform one-time treatment is that it maintains active coverage through both the fall entry window and the late-winter emergence period — the two points where treatment has the most impact. If activity reappears between scheduled visits, Pest Shield returns at no charge under the 100% effective guarantee.
Pest Shield’s Standard Care Plan schedules exterior treatment every 60 days — more frequently than the quarterly cadence most pest control companies use. If stink bugs or other covered pests reappear between scheduled visits, Pest Shield comes back out at no additional charge. That guarantee applies between visits, not just at the next scheduled appointment. The plan covers general pest pressure including stink bugs, ants, spiders, and other common invaders, with complete exterior treatment focus and little to no interior treatment required. You don’t need to be home for scheduled visits.
Pest Shield uses EPA-approved products and an exterior-first treatment approach that keeps product outside the living space by design — interior treatment is rarely needed for stink bug control. Nontoxic bio-pesticide options are available for households with children and pets. Troy will discuss the specific products being used and any precautions relevant to your household before treatment begins.
Pest Shield serves the full northern Frederick County area including Emmitsburg, and same-day and next-day scheduling is the norm for most service requests. For active infestations or urgent situations, Troy has consistently been documented arriving the same day a call comes in — including Sundays at no extra charge. Call (301) 829-0060 or request a free inspection online and you’ll speak directly with the people who will do the work, not a call center.
