- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield has been treating bed bug infestations in Mt. Airy since 2011, working out of our Lomar Drive office just minutes from most homes we service. Owner Troy Yowell holds Maryland Department of Agriculture license #30263 and certification #19058, with roughly 35 years of pest management experience that includes contract work on U.S. military bases overseas. Our team carries more than 75 years of combined experience and includes an on-staff entomologist, Jeffrey Allwine, for cases where species-level identification matters. Across 338+ five-star reviews, customers consistently describe the same pattern on bed bug calls — extended time spent explaining what’s happening before any treatment is scheduled.
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.
Bed bugs (Cimex lectularius) leave a specific set of physical signs that distinguish them from fleas, mites, or other biting insects. Most people second-guess what they’re seeing for days or weeks before calling — that’s normal, but earlier detection makes treatment more straightforward, because the infestation hasn’t yet spread to multiple rooms or deeper into furniture.
The signs to look for, in roughly the order you’ll notice them:
If you’ve found one or more of these signs, the right next step is a free inspection — not weeks of trying to figure out whether it’s “bad enough” to call. Bed bug populations double roughly every 16 days under typical conditions, so the gap between “I think I see one” and “they’re in every room” closes quickly.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
It was a horrible discovery when we realized we had brought bed bugs to our home from a hotel we had stayed in. I called Troy in an absolute panic and he was so kind, patient and helpful. He spent over an hour on the phone with me, educating me all about bed bugs and how to get rid of them. I called back twice more before he came to service our home because I was so upset and he truly helped ease my fears. When he came he was prompt, thorough, and professional. I also greatly appreciated how he scheduled a follow up to make sure the problem was taken care of. We were SO grateful with the new technology and spray Troy uses that was safe for our children and dog, left no smell, and completely eradicated the problem. Troy is honest, extremely kind, unbelievably knowledgeable, priced very fair, and more than capable of handling bug problems. We couldn’t recommend him more!
Alexandra Edwards · January 2023 Read on Google →
We hired Pest Shield despite the fact that their price was more than double some of the other companies I interviewed. The reason we did is because unlike the other companies, Pest Shield uses heat as a treatment. After doing my online research, I decided it was worth the extra money to do so. The first round of heat didn’t completely work – the next day, Troy from Pest Shield and I found live bed bugs in some of the blankets. Troy was true to his word, and reheated the upstairs for free and did additional treatments. It appears this second heat treatment was completely effective.
Marc Shiman · April 2014 Read on HomeAdvisor →
I had bed begs. Troy and his team got rid of them (so far). It has only been a few days but I was very impressed with the professionalism, honesty and expertise he provided to me. His pricing compared to his competitors was great as well! I was so impressed I referred him to my parents for termite treatment before he even did the treatment in my home. I would definitely recommend Troy and Pest Shield to others, and would hire Troy again in a second!
Alison Harris · November 2013 Read on HomeAdvisor →
General pest & rodent control
Pest Shield‘s primary bed bug treatment uses an EPA-approved bio-pesticide applied directly to the areas where bed bugs hide and travel. The product is safe for homes with children and pets, leaves no lingering odor, and works through direct contact and residual activity in treated areas. For most Mt. Airy infestations caught at a reasonable stage, this is the method Troy recommends. For severe or deeply established infestations, Pest Shield also offers heat treatment as a named alternative — raising room temperatures to levels that kill bed bugs at every life stage, including eggs.
Bed bug work is a bounded service — it has a defined start, a defined end, and a confirmation step. Here’s how a typical treatment progresses:
Most bed bug cases resolve fully after the initial treatment and follow-up — typically a 3 to 6 week window from first visit to confirmed eradication, driven by the egg hatch cycle. Some cases require an additional treatment, which is why the follow-up visit is built into the service rather than treated as a separate appointment.
On safety: the bio-pesticide Pest Shield uses is EPA-approved and applied at label-compliant rates. It carries no strong odor and is considered safe for occupied homes, including those with young children and pets. After treatment, you’ll be given standard re-entry guidance — typically a few hours for treated surfaces to dry — and that’s the extent of the post-treatment precautions for most households. If anyone in the home has specific medical sensitivities, mention them during the initial call so the application plan can be adjusted.
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.
Pest Shield is headquartered on Lomar Drive in Mt. Airy, right at the seam where Frederick and Carroll counties meet along Route 27. Most of our bed bug calls come from within a 20-minute drive — the older homes along Main Street, the newer subdivisions south toward Twin Arch Road, and the wooded lots stretching out toward Woodbine and Damascus. We’re a local company treating a local problem, not a franchise dispatching from somewhere else.
Bed bugs aren’t driven by soil, climate, or housing stock the way termites and rodents are — they travel with people. Mt. Airy sits at the intersection of I-70 and Route 27, which puts most residents on commuter routes into the DC metro corridor and within easy reach of BWI and Dulles. Bed bugs arrive via hotel stays, secondhand furniture, college students returning home, and house guests. Anyone can get them — which is why pest control in Mt. Airy covers far more than any single pest.
The inspection determines the right method. For most bed bug cases in Mt. Airy homes — including infestations that have spread across a couple of rooms — the bio-pesticide single-application method is effective, lower-disruption, and the option most customers prefer. Heat treatment is typically recommended for severe or deeply established infestations, or for situations where chemical treatment isn’t a good fit. Troy will walk through both options during the free inspection and explain which is appropriate for your specific situation.
Most bed bug cases resolve with one treatment plus a scheduled follow-up visit to confirm eradication, typically over a 3 to 6 week window. The timeline is driven by bed bug biology — eggs can survive an initial treatment and hatch in the days that follow, which is why the follow-up visit matters. If the follow-up finds remaining activity, Pest Shield re-treats at no additional charge.
Yes. The bio-pesticide Pest Shield uses is EPA-approved and applied at label-compliant rates that are considered safe for occupied homes with children and pets. It leaves no strong odor. After application, you’ll be given a standard re-entry window — usually a few hours for treated surfaces to dry — and that’s typically the extent of the precautions for most households. If anyone in the home has specific medical sensitivities, let Troy know during the initial call.
Preparation depends on the treatment method and the rooms involved, and Troy will walk you through the specifics during the inspection or initial phone consultation. In general, bio-pesticide treatment requires less preparation than heat treatment — typically washing and drying bedding on the highest heat setting the fabric will tolerate, reducing clutter near beds and furniture so harborage areas are accessible, and vacuuming thoroughly before the visit. Don’t apply DIY sprays or foggers beforehand; they tend to scatter bed bugs into harder-to-treat areas.
Seeing a few bed bugs in the first one to two weeks after treatment isn’t unusual — eggs that survived the initial application can hatch, and stragglers may emerge from deeper harborage areas. That’s exactly why the follow-up visit is part of the service. If activity is still present at the follow-up, Pest Shield re-treats at no additional charge until the infestation is fully resolved. Call or text Troy directly if you’re seeing more than a few isolated bugs and he’ll move up the follow-up.
