- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield has been treating tick pressure on Mt. Airy properties since 2011, working out of our Lomar Drive office at the Carroll-Frederick county line. Owner Troy Yowell holds Maryland Certified Applicator #19058 and runs the business under MDA license #30263, with more than 60 years of combined pest management experience across the team. Our work has been recognized as Best of Frederick MD Pest Control in 2021 and Best of Nextdoor four years running from 2021 through 2024, supported by 338+ five-star reviews on 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.
If you’re pulling ticks off the dog after a walk through the yard, finding them on kids after time in the grass, or spotting them along the wood line, you’re dealing with the dominant pest pressure of Mt. Airy’s wooded, semi-rural lots. Ticks don’t drift across open lawn — they live in specific habitat zones, and most Mt. Airy properties have several of them.
Here’s where ticks actually concentrate on a typical Mt. Airy property:
Two species drive most of the activity in Central Maryland. The black-legged tick (Ixodes scapularis, also called the deer tick) is the species associated with Lyme disease and is most active in spring and again in fall. The American dog tick (Dermacentor variabilis) is the larger, more visible tick people typically find on pets, with peak activity from late spring through summer.
A single treatment knocks down what’s active that week. The reason most homeowners on wooded lots see ticks return within a month or two is that the underlying habitat — leaf litter, shaded edges, deer traffic — keeps producing new ticks throughout the season. Tick control on this kind of property is a perimeter management job, not a one-time spray.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
We chose Pest Shield after contacting a few different pest control companies because we liked how Troy took his time to explain his experience and the science behind the products he uses. Troy has been working with us to manage two separate infestations and he has been incredibly generous with his time, energy and expertise. After speaking with my husband, he offered to come out the same day and as he inspected the house, he offered useful suggestions for ways to manage other things like spiders in the windows. We have a young son who is immunocompromised and Troy was very respectful of the safety precautions that we are currently taking. We are so grateful for his knowledge, promptness and kindness.
Erin Swen · December 2021 Read on Google →
We used Pest Shield to eliminate some unwanted mice. They responded quickly to our inquiry & we got an appointment within a couple days. They thoroughly explained to us what the appointment would entail and what to expect. Our biggest concern was the safety of products being used around our two dogs. Troy inspected the house inside and out, explained to us his plan & answered all our questions. We are very happy with this company’s service and would highly recommend them. The best part – no more mice!
anne brown · February 2022 Read on Google →
I have been working with Troy for a year now and I would never even consider using another company. On-time, high quality, dependable and customer-centric are words that come to the top of my mind. In an industry filled with folks out to make a fast dollar, Troy is one of the few that is more concerned about doing the job right no matter what it takes. Having pest issues? Don’t think twice about contacting him; you’ll be glad you did.
Raymond Balestino · November 2022 Read on Google →
General pest & rodent control
Pest Shield‘s tick control work starts with a free property inspection. Troy or one of the technicians walks the yard, identifies the harborage zones specific to your property — wood line, ornamental beds, shaded leaf litter, fence lines, deer corridors — and builds the treatment around where ticks are actually living rather than spraying the whole lawn. This exterior-first, perimeter-focused approach is the same methodology we use across all general pest work, and it’s what John Moore’s review describes as Pest Shield treating “primarily from the outside to prevent pests from ever getting into your house.”
The treatment itself targets the habitat zones identified during inspection:
For ongoing protection on a Mt. Airy property — which is what wooded lots in this region almost always need — tick control fits into Pest Shield’s Standard Care Plan. The plan runs on a 60-day bi-monthly cadence (more frequent than the industry-standard quarterly), maintains a treated perimeter through the full tick season from spring through fall, and carries a 100% effective guarantee. If pest activity returns between scheduled visits, we come back and re-treat at no charge. You don’t need to be home for service.
For homes with kids and pets, we use EPA-approved products and have nontoxic bio-pesticide options available. The exterior-first approach keeps treatment out of living spaces entirely — Charles’s review documents Troy proactively cautioning about treatment around a 2-year-old, anne brown’s review confirms safety for homes with dogs, and Erin Swen’s review confirms treatment around an immunocompromised child. Treated areas are safe to use once dry, and the products are selected to break down on the surfaces where ticks live without lingering where families spend time.
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.
Mt. Airy sits on the ridge that divides Frederick and Carroll counties, with Route 27 running the spine of town and Interstate 70 cutting along the southern edge. The surrounding landscape — wooded residential lots, working farms, creek corridors feeding the Patapsco and Monocacy watersheds, and the rolling forested terrain that defines this part of the Piedmont — produces the habitat conditions that drive heavy tick pressure on local properties.
The same features that make Mt. Airy a desirable place to live also make it a hot spot for ticks. Heavily wooded residential lots, properties backing to tree lines and unmaintained margins, deer traffic moving freely between woodlots and yards, and the humid Central Maryland summers combine to extend the tick season from early spring through late fall. Pest control in Mt. Airy on this kind of lot does real work that broadcast lawn spraying can’t.
Yes. Pest Shield uses EPA-approved products and has nontoxic bio-pesticide options available specifically for homes with children and pets. Because our tick work is focused on exterior perimeter zones — wood lines, ornamental beds, fence lines — product stays out of living spaces entirely, and treated areas are safe to use once dry. If you have specific concerns about a play area or pet zone, tell Troy during the inspection and he’ll adjust the treatment plan around it.
For most Mt. Airy properties — especially wooded lots or properties with deer traffic — one treatment won’t hold the season. Ticks live in habitat zones that keep producing new activity as long as conditions are favorable, which in Central Maryland means roughly March through November. Pest Shield’s Standard Care Plan runs on a 60-day bi-monthly cadence with a 100% effective guarantee and free retreatment between visits if activity returns. That’s the service model that actually maintains a treated perimeter through tick season. If you only have a small, isolated issue, Troy will tell you that and recommend a single treatment instead — we don’t push the plan when it isn’t warranted.
Two species drive most of the activity in this part of Maryland. The black-legged tick (Ixodes scapularis), also known as the deer tick, is the smaller species associated with Lyme disease and is most active in spring and fall. The American dog tick (Dermacentor variabilis) is larger, more visible, and the one most often found on pets, with peak activity from late spring through summer. Both species share the same habitat zones — wood edges, leaf litter, tall grass — which is why perimeter treatment addresses them together.
Early spring — typically March or April — is the right time to start, before adult black-legged ticks become active and before the spring peak. Starting early establishes a treated perimeter ahead of the season instead of chasing activity once it’s already on your pets and family. If you’re reading this in summer or fall and dealing with active ticks, the answer is the same: call now, treat now, and the bi-monthly cadence will carry protection through the rest of the active season.
Same-day or next-day in most cases. Mt. Airy is our home base — our office is on Lomar Drive — so response time to local properties is fast. Call (301) 829-0060 and you’ll speak directly with Troy or the office, not a call center. The first visit is a free inspection where we walk the property, identify the tick harborage zones specific to your lot, and recommend either a single treatment or the Standard Care Plan based on what we find.
