- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. has provided licensed pest management to New Market and 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 with over 75 years of combined experience across the Pest Shield team, stink bug season in Central Maryland is a pattern the company knows well. Pest Shield holds a 5.0 rating across 338+ reviews on Google and HomeAdvisor, and has been recognized as Best of Frederick MD Pest Control (2021) and Best of Nextdoor for four consecutive years.
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.
If you’re seeing brown marmorated stink bugs (Halyomorpha halys) massing on your siding, clustering around window frames, or turning up inside on warm afternoons, you’re watching a predictable seasonal behavior — not a random infestation. New Market’s landscape makes this pattern more pronounced than in many Central Maryland communities, and understanding why helps explain what it takes to actually stop it.
A single treatment in October addresses the wave that’s already arrived. But stink bugs already inside will continue to emerge through winter, and next year’s population will follow the same route unless the exterior barrier is maintained. That’s the practical reason one-time treatment often leaves homeowners dealing with the same problem the following fall.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
Pest Shield treats your house primarily from the outside to prevent pests from ever getting into your house and keeps the chemicals out of your home, protecting your family. Pest Shield now protects our home regularly and I recommend them highly.
John Moore · June 2014 Read on HomeAdvisor →
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 →
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 →
General pest & rodent control
Pest Shield’s approach to stink bug control starts with an exterior inspection — identifying where bugs are aggregating, which surfaces they’re using as staging areas, and where the likely entry points are. Troy Yowell and the Pest Shield team treat the exterior perimeter, focusing on the surfaces stink bugs actually use: siding, window frames, door frames, soffits, and utility penetrations. As one long-term customer described it, Pest Shield “treats your house primarily from the outside to prevent pests from ever getting into your house and keeps the chemicals out of your home, protecting your family.” For stink bug work specifically, that exterior-first approach is the right one — the goal is to intercept them before they’re inside, not to chase them through wall voids.
| Service Step | What Happens |
|---|---|
| Free Inspection | Troy or a technician walks the exterior, identifies aggregation areas and entry points, and confirms the scope of activity before any treatment is recommended. |
| Exterior Perimeter Treatment | EPA-approved product applied to exterior surfaces where stink bugs aggregate and the entry points they exploit — siding, window and door frames, soffits, utility penetrations. Little to no interior treatment required in most cases. |
| Entry Point Assessment | Identification of structural gaps and penetrations contributing to entry. Pest Shield notes these for the homeowner as part of the service. |
| Follow-Up Protection | Pest Shield’s Standard Care Plan maintains the exterior barrier on a 60-day bi-monthly cadence — timed to cover peak fall entry season, winter emergence, and spring activity before the next generation disperses. |
After treatment, stink bug activity on exterior surfaces typically drops noticeably within days. Bugs already inside wall voids may continue to emerge on warm days for a period — this is normal and expected, and Pest Shield will explain what to anticipate when the work is done. If activity reappears between scheduled visits, Pest Shield returns at no additional charge under the Standard Care Plan’s 100% effective guarantee. There’s no need to be home for scheduled exterior treatments.
For homeowners who want to stay ahead of the annual cycle rather than react to each fall wave, Pest Shield’s Standard Care Plan — with its 60-day bi-monthly cadence and free retreatment guarantee — is the practical option. It’s offered when it genuinely fits the situation, not pushed as a default. The treatments use EPA-approved products applied to exterior surfaces, which minimizes any interior exposure. Nontoxic options are available for homes 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.
New Market sits at the eastern edge of Frederick County along US-40 and Interstate 70, with agricultural fields and wooded corridors extending in multiple directions. The town is close to the Frederick County–Carroll County line, and the surrounding landscape — a mix of working farmland, hedgerows, and wooded residential lots — is exactly the summer habitat brown marmorated stink bugs favor before their fall migration toward structures.
Homes in New Market with wooded backyards or fields directly adjacent face measurably heavier stink bug pressure than more densely developed neighborhoods. The town’s older housing stock, with wood siding, aging window frames, and construction gaps common in pre-2000 builds, gives stink bugs more entry options than newer construction. That combination of landscape exposure and structural vulnerability makes exterior perimeter treatment particularly well-suited to this area — and it’s why pest control in New Market often requires a more sustained seasonal approach than in more urbanized communities.
Brown marmorated stink bugs follow an annual cycle tied to temperature and food availability. They spend spring and summer feeding in agricultural fields and wooded areas — both of which surround New Market — then migrate toward structures in late summer and fall as temperatures drop and they seek overwintering shelter. Your home isn’t being targeted randomly; it’s a warm, sheltered structure in a landscape that produces large stink bug populations every year. Without an exterior barrier treatment in place before and during peak migration, the same entry points that let them in last fall will let them in again this year.
In most cases, no. Pest Shield’s approach focuses on the exterior — treating the surfaces where stink bugs aggregate and the entry points they use before they get inside. As one customer put it, Pest Shield “treats your house primarily from the outside to prevent pests from ever getting into your house and keeps the chemicals out of your home.” Interior treatment is applied when genuinely warranted, but the exterior-first methodology is both more effective for stink bugs and better for your household.
Stink bugs already inside wall voids or attic spaces before treatment may continue to emerge on warm days for a period afterward — Pest Shield will explain what to expect when the work is done. If new exterior activity or interior emergence indicates the treatment needs reinforcement, Pest Shield returns at no additional charge. The Standard Care Plan includes a 100% effective guarantee with free retreatment between scheduled visits if pest activity reappears. You don’t need to wait for your next scheduled visit to call.
Yes. Pest Shield uses EPA-approved products applied to exterior surfaces, which keeps product outside the home and minimizes any interior exposure. Nontoxic options are available for households with children and pets — Troy will confirm the appropriate approach during the inspection based on your home’s specifics. Pest Shield has documented experience treating homes with young children and immunocompromised family members, and product safety is part of the conversation before any treatment begins.
A single treatment addresses the current wave, but stink bugs return on the same seasonal cycle every year — and bugs already inside before treatment can continue to emerge through winter. Pest Shield’s Standard Care Plan, with its 60-day bi-monthly cadence, keeps an exterior barrier in place through peak fall entry season, winter emergence, and spring activity before the next generation disperses. It’s a practical fit for New Market homes with significant agricultural and wooded surroundings. That said, Pest Shield assesses each situation honestly — if a one-time treatment is the right answer for your home, that’s what will be recommended.
