- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. (MDA #30263) has provided licensed tick and pest control across Frederick County since 2011, with over 75 years of combined pest management experience on staff. Owner Troy Yowell leads a team that includes Jeffrey Allwine, a certified entomologist available for species-level identification when field diagnosis isn’t conclusive. Pest Shield holds a 5.0 rating across 338+ reviews and has been named Best of Frederick and Best of Nextdoor four consecutive years — and serves Emmitsburg and all of Frederick County directly, with no call center or subcontractors between you and the technician who shows up.
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.
Finding a tick on your child after an afternoon in the backyard — or pulling one off your dog after a walk along a field edge — is the moment most Emmitsburg homeowners start paying attention to tick control. In this part of Frederick County, that moment comes more often than it does in more developed areas of Maryland. The landscape around Emmitsburg creates sustained, season-long tick pressure that doesn’t resolve on its own.
Two species account for most of the tick risk on residential properties in this area:
On a typical residential property, ticks don’t distribute evenly across the lawn. They concentrate in specific harborage zones:
Properties near wooded lots, creek corridors, or field edges — common throughout Emmitsburg’s residential areas — face ongoing tick introduction from wildlife moving through. A single treatment can reduce the population present at that moment, but it doesn’t interrupt the source. Ticks continue to be carried onto the property by deer, rodents, and other wildlife throughout the active season, which is why one-time treatment typically provides limited lasting protection in this type of landscape.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
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 →
We have used Pest Shield twice so far and each time we had an exceptional experience. We found Troy to be very honest, knowledgeable and professional. This company is built on integrity and will not overcharge you for services that are not needed. They know the biology behind the pests and the problem and won’t just spray to spray something. I highly recommend this company.
Jennifer Swistak · April 2025 Read on Google →
General pest & rodent control
Every Pest Shield tick service starts with a property inspection. Troy or a technician walks the property before recommending any treatment — identifying harborage zones, assessing vegetation structure, and noting the specific conditions driving tick pressure on that lot. For properties near wooded edges or field margins, that inspection shapes where treatment is concentrated. There’s no standard spray-and-go approach; the inspection determines the plan.
Pest Shield’s treatment approach is exterior-first by design. Product is applied to the perimeter, tick harborage zones, vegetation edges, and the transition areas between maintained lawn and natural cover — the places where ticks actually live and wait for a host. Interior treatment is not part of tick service; the goal is to address the problem at its source, outside, and keep product application away from living areas.
For Emmitsburg properties with sustained tick pressure — particularly those near wooded lots, field edges, or wildlife corridors — Pest Shield’s Standard Care Plan is the appropriate service structure. Here’s what that looks like in practice:
| Service Element | Detail |
|---|---|
| Treatment cadence | Every 60 days (bi-monthly) — more frequent than the industry-standard quarterly schedule |
| Season coverage | Calibrated to Maryland’s tick-active season, typically March/April through first hard frost |
| Treatment focus | Complete exterior perimeter, harborage zones, and vegetation transition areas |
| Guarantee | 100% effective guarantee — free retreatment between scheduled visits if tick activity reappears |
| Scheduling | No need to be home for scheduled treatments |
The 60-day cadence matters for tick control specifically because tick populations on a property are continuously replenished by wildlife throughout the active season. Treating every 60 days maintains a treated perimeter that interrupts that cycle rather than simply reducing the population at one point in time. The free retreatment guarantee means that if you’re seeing tick activity between scheduled visits, Pest Shield comes back — no additional charge.
After each visit, you’ll know what was treated and what to expect. If conditions change — new vegetation growth, a wet spring that extends tick season, or unusual wildlife activity — the technician notes it and adjusts accordingly. Pest Shield’s treatments use EPA-approved products; nontoxic bio-pesticide options are available for households with children and pets, and the exterior-first approach keeps product application out of living areas entirely.
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 to the west by South Mountain and positioned at the edge of the Catoctin Mountain corridor. The town is surrounded by a mix of agricultural land, wooded foothills, and creek drainages — terrain that sustains significant deer and small mammal populations year-round. Pest Shield serves all of Frederick County from its Mt. Airy base, with Emmitsburg well within its regular service area alongside Thurmont, Walkersville, and Frederick city.
The combination of agricultural fields, wooded lot edges, and proximity to the Catoctin corridor makes Emmitsburg properties — particularly those on the town’s outskirts — among the higher tick-pressure locations in Frederick County. Deer move freely between wooded cover and residential yards; field margins adjacent to mowed lawns are classic black-legged tick habitat. Properties near Flat Run or other creek corridors face additional pressure from the moisture and wildlife movement those features attract. Pest Shield’s familiarity with rural and semi-rural Frederick County property types is directly relevant to the tick conditions homeowners encounter — and our pest control in Emmitsburg covers the full range of pests that share this landscape.
Tick season in Frederick County typically runs from late March or early April through the first hard frost, usually in October or November — though black-legged ticks (*Ixodes scapularis*) can remain active on mild days well into winter. American dog ticks peak from late spring through midsummer. In practice, for properties near wooded edges or field margins in the Emmitsburg area, meaningful tick pressure spans roughly seven to eight months of the year, which is why Pest Shield’s Standard Care Plan is structured around a 60-day treatment cadence rather than a single seasonal application.
For most Emmitsburg properties — especially those near wooded lots, field edges, or wildlife corridors — a single treatment provides limited lasting protection. Ticks are continuously reintroduced onto treated property by deer, rodents, and other wildlife throughout the active season, so a one-time application reduces the population at that moment but doesn’t address the ongoing source. Pest Shield’s Standard Care Plan treats every 60 days across the active season, maintaining a treated perimeter that interrupts that cycle. The plan includes a 100% effective guarantee and free retreatment between scheduled visits if tick activity reappears.
Yes. Pest Shield uses EPA-approved products for all tick treatments, and nontoxic bio-pesticide options are available for households with children and pets. The exterior-first treatment approach keeps product application outside and away from living areas — the perimeter, vegetation edges, and harborage zones are treated, not interior spaces. Troy will note any specific precautions relevant to your property during the inspection and after treatment.
Yes — Pest Shield serves all of Frederick County, including Emmitsburg, from its Mt. Airy base. Same-day and next-day scheduling are standard for most service requests, and Pest Shield has documented same-day availability including Sundays at no extra charge. Every new client relationship starts with a free property inspection before any treatment is recommended — call (301) 829-0060 or use the website contact form to get started.
The free inspection is a full property walkthrough — Troy or a technician assesses the exterior, identifies tick harborage zones (leaf litter, wood piles, shrub borders, vegetation transition areas), notes conditions specific to your lot such as proximity to wooded edges or field margins, and explains what they find before recommending any treatment. You’ll leave the inspection knowing exactly what’s driving tick pressure on your property and what a treatment plan would address. There’s no obligation, and Pest Shield will tell you honestly if a service plan isn’t warranted for your situation.
