- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield has been removing yellow jackets from Mt. Airy homes since 2011, with Troy Yowell and team responding the same day — including Sundays and after hours at no extra charge. The company holds Maryland Department of Agriculture license #30263, with certified pesticide applicator credentials (MD #19058) and an on-staff entomologist, Jeffrey Allwine, for species-level identification when it matters. Pest Shield has been voted Best of Nextdoor four years running (2021–2024) and Best of Frederick Pest Control (2021), with a 5.0 rating across 338+ reviews — yellow jacket work is the company’s most-reviewed stinging insect service.
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 watching yellow jackets stream in and out of a gap in your siding, a hole in the ground near your deck, or an exhaust vent cover, you have a nest — and from late July through October, that nest is at peak size and peak aggression. A mature colony can hold 1,500–4,000 workers, and yellow jackets defend the nest entrance with a coordinated response that escalates within seconds of disturbance.
Across Mt. Airy and the surrounding Frederick and Carroll County properties, nests typically turn up in these spots:
The danger with in-structure nests is that DIY aerosol treatment usually makes the situation worse. Spraying into a wall-void entrance drives yellow jackets deeper into the cavity — and from there they often push through outlet boxes, baseboard gaps, or HVAC penetrations into living spaces. For households with anyone who has a sting allergy, or with children playing near a nest entrance, that’s not a risk worth taking.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
HIGHLY RECOMMEND!! Troy was very professional, honest & his work was effective! Our home is under contract and we had to ensure our yellowjacket issue was resolved with little to no damage done. After many failed treatments with another company resulting in the bees getting inside our walls, we decided to find an expert. The Google reviews speak for themselves! TROY is the real deal! Super responsive, educated us on all the possibilities of our issue, treatment & possible results. Warranty is great even though so far we have no need to use it thus far. He even called to check on us after his treatment to ensure everything was resolved. Good customer service is hard to come by but Troy provided AMAZING customer service! Don’t waste your time or stress call Troy!
Kaylin Gonzalez · August 2023 Read on Google →
My wife and I discovered a yellow jackets nest in our siding had moved inside our bedroom wall. Bees were starting to come into the bedroom through the baseboards and window. We called a few large companies first who tried to sell us on an initial price followed by 7 months of service. We’re glad we called Troy at Pest Shield. He gave us a low quote and even stood by it after noticing we had one of the larger nests he had come across this year. Troy was professional going over everything he was going to do while providing us options. We are no longer hearing bees in the wall and the outside activity has dwindled to a bee here or there. Nothing is choosing to go back where Troy sprayed. We really appreciate being bee free again.
djsportbike · August 2023 Read on Google →
On Saturday afternoon, I noticed what looked like the beginning of a water leak in my bedroom ceiling. However, when I got up to inspect it, my finger went right through the drywall and yellow jackets started pouring out. Thank goodness Troy was willing to come out on a Sunday to deal with this so we could get the use of our bedroom back. (My husband is highly allergic so having them inside the house was a health hazard.) Troy was punctual, explained what would happen and dealt with the little beasts very swiftly even though he said it was the largest nest he’d seen in his 35 years in the business. His price was reasonable. He refused to charge us extra for coming on a Sunday and for dealing with what turned out to be a huge nest. I’ve used Troy in the past for other pest management issues. He is honest, reliable and always solves our problems. I highly recommend Pest Shield, Inc. for all your pest issues.
Loretta Usilton · August 2024 Read on Google →
General pest & rodent control
Yellow jacket calls get priority scheduling at Pest Shield. When you call (301) 829-0060, you reach Troy or the office directly — not a dispatcher — and the typical response is same-day. Sunday and after-hours service is documented across the review record, including a Saturday afternoon call from a Mt. Airy homeowner whose ceiling cracked open over yellow jackets in a wall, and a Sunday-morning ground-nest removal with no surcharge for the weekend.
The visit follows a consistent pattern:
Yellow jacket removal is a single-visit service with a seasonal warranty — if a treated nest shows activity again during the same season, Pest Shield comes back at no charge. Colonies don’t reuse the same nest year over year (the queen overwinters elsewhere and starts fresh), so once this season’s nest is eliminated, that specific site is done.
On safety: the products used are EPA-approved and applied directly to the nest site rather than broadcast across the property. Troy advises on any precautions for the treated area before leaving — typically a short window of staying away from the immediate nest location — and the eco-friendly treatment process has been called out by customers as a reason they chose Pest Shield. For homes with children, pets, or anyone with a sting allergy, the goal is to resolve the nest with the least exposure necessary and confirm it’s done.
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 between Frederick and Carroll counties, with wooded lots, mixed agricultural surroundings, and a housing stock that ranges from older farmhouses along Ridge Road to newer subdivisions off Route 27. Pest Shield is based on Lomar Drive in Mt. Airy — this is our home territory, not a long-haul dispatch from Baltimore or D.C.
The same conditions that make Mt. Airy a good place to live also make it a good place for yellow jackets: warm, humid Central Maryland summers support larger colonies into late season, and wooded edges, landscaped beds, and older soffit and siding details give workers easy nesting access. Carroll and Frederick County properties tend to see peak nest discovery from late July through October, when colonies are at full size and most defensive. If you’re also dealing with other stinging insects or seasonal pests, pest control in Mt. Airy covers the full range of pressures common to this area.
Same day in most cases, including Sundays and after hours. Yellow jacket calls get priority scheduling because the situations are time-sensitive — a nest near a doorway, a wall-void nest pushing into living space, or a sting-allergy household. When you call (301) 829-0060, you reach Troy or the office directly, and the response window is typically a few hours rather than a few days. There’s no surcharge for weekend or after-hours visits.
Watch where the yellow jackets enter and exit. If they’re disappearing into a gap in siding, a crack in trim, a hole in a soffit, or behind an exhaust vent cover — and not coming back out of the same opening immediately — the nest is almost certainly inside the wall or void behind that opening. Outdoor nests on a deck joist or in a shrub are usually visible as a gray paper structure. Ground nests show as a steady stream of workers in and out of a hole in the dirt. Troy can confirm the nest location during the visit, and it changes how the treatment is applied.
Yes. The products used are EPA-approved and applied directly to the nest entrance rather than broadcast across the yard or home. Troy will let you know the short window — typically a few hours — to stay away from the immediate treated area, and the eco-friendly treatment process is one of the reasons customers in our review record have called us out specifically. If anyone in the home has a sting allergy or you have specific concerns about a pet or a play area near the nest, mention it when you call so the approach can account for it.
Workers out foraging will return to the nest entrance and encounter the treatment, which eliminates them at the entry point. Troy stays briefly on-site after applying the treatment to address any returning foragers directly, and a follow-up call the next day confirms activity has stopped. If you’re still seeing workers at the entrance after that, we come back at no charge — it’s covered under the seasonal warranty on the treatment. Properties dealing with multiple stinging insect species may also want to know about hornet control in Mt. Airy, which follows a similar treatment approach.
Not to the same nest. Yellow jacket colonies don’t reuse nests year over year — the original queen and workers die off in late fall, and a new queen overwinters elsewhere and starts a fresh nest in the spring, almost always in a different location. What can happen is that a structural feature on your home — a soffit gap, a torn vent screen, an entry point in siding — keeps attracting new queens looking for a cavity. Troy will point out any structural openings worth sealing during the visit so the same spot doesn’t become a repeat target.
