At Once Pest - Your Pest Control Company

Great news from microbiologists and an entomologists!

Facing a bed bug infestation but don't have the money for an expensive bed bug heat treatment?

Now there may be hope. Researchers at the University of Pennsylvania recently developed a break-through treatment for bed bugs - a microbiologist and an entomologist cultivated spores of a fungal disease that is deadly to bed bugs. This is not just another insecticide, this is a living organism that attacks and kills bed bugs. Further research done at North Carolina State University recorded bed bug mortality at just about 100 percent at about 2 weeks. And we can offer this spore treatment at roughly half the price of a conventional heat treatment. Sounds too good to be true? There is one catch - it will take one to 2 weeks for this stuff to work. So now you have a choice - a complete and immediate knock down of bed bugs using heat or a slower-working treatment that takes longer but cost less.

We are not someone offering you a treatment based on what we can or cannot provide. We can do both so we can be more objective and honest then other people in this industry.

Life is better when you have choices. Pest control is better when you have choices. Pest control is best when you choice us!

Current Pest Threats - squirrels, mice, cockroaches, black snakes. Read more, get help...

Fall is here here. And it brings a few new pest threats - squirrels, mice, as well as the usual all-year suspects - rats, and cockroaches stick around. Call us or email us for fast service.

Wildlife Alert! Fall is here. This is the time of year when you may start hearing noises in your attic and it could be because squirrels or flying squirrels moved in to hybernate. We can help. Visit our wildlife control website.

Have critters in your attic? Consider the following.

Animals defecate and frequently. Urine and feces can carry diseases. Here are a few:


Carried in the urine of white footed mice. Can produce flu-like symptoms and can progress causing serious respiratory problems.


It is a type of lung infection spread by the spores of the Histoplasma capsulatum fungus. It is commonly found in the feces of bats and birds and can cause serious respiratory issues for people with poor immune systems.

Read more

How much does it cost to professionally remove bed bugs?

For a bed bug removal, expect to pay anywhere from $600 and up, depending on the method you choose. While heat treatments are the most organic and effective, we do now offer more choices. Different types of treatment can be combined.

We could heat-treat your worst bed bugs infested bedrooms, and then use fungal spores on the rest of your house. This will cost a lot less than heat treating the entire house.

Life is better when you have choices. Pest control is better when you have choices. Pest control is best when you choose us!

Our Mission - We Prevent Future Problems

Our mission is not only to remove an acute pest problem, but to prevent any future problems by exclusion, sealing cracks and crevices. We will protect your home so you can feel safe.

Considering chemical bed bug treatment?

Watch Bed Bugs Die During Heat Treatment

Why do we stress the importance of the heat treatment? Because it works (read The Truth About Chemical Bed Bug Treatment.) We don't want to see people wasting money on all-chemical treatments that just don't work.

Bed Bug Treatment Warranty. No matter how good the treatment is, this is a tough pest.

We will to come back and reinspect if there are signs of problems or re-infestation. If desired, we can bring Canine Bed Bug detection dogs to help access possible re-infestation. See more at


We provide the fast residential and commercial bed bug heat treatment in Baltimore City, Baltimore County, Anne Arundel, Harford, Montgomery, Prince George's, Carroll and Howard County including:

Millersville, Severn, Annapolis, Arnold, Crownsville, Waugh Chapel, Pasadena, Crofton, Davidsonville, Glen Burnie, Marley Station, Lithicum, Hanover, Jessup, Fort Mead, Severna Park, Silver Spring, Rockville, Gaithersburg, Aberdeen Proving Ground, Bel Air, Edgewood, Fallston, Jarrettsville, Joppatowne, Abingdon, Belcamp, White Hall, Columbia, Laurel, Elkridge, Ellicott City, Jessup, Savage-Guilford, Clarksville, Beltsville, Adelphi, College Park, Gambrills, Berwyn Heights, Hyatsville, Forestville, Upper Marlboro, Mitchellville, Bowie, Landover, Fort Washington. Arbutus, Butler, Catonsville, Cockeysville, Eldersburg, Finksburg, Hamilton, Hampstead, Hartford, Hunt Valley, Jarrettsville, Lutherville, Mount Washington, Overlea, Owings Mills, Parkville, Perry Hall, Phoenix, Pikesville, Randallstown, Reisterstown, Rosedale, Ruxton, Sykesville, Towson, Timonium, Westminster, and Woodlawn.

Get the peace of mind to have a great night's sleep. All Pest K9 is a privately owned and independent Canine Bed Bug detection and prevention company.

Why Heat Treatment?

What makes our approach to bed bug control different? We use Heat Treatment. Chemicals, powders, freezing, etc. only work if the bed bugs are directly contacted. That's why most other methods fail. It is virtually impossible to find every single bed bug, not to mention - every single egg. Most chemicals won't kill eggs even if they are contacted. Back before I used heat treatment it would take me up to 3 retreats to get rid of all the bed bugs and these treatments would be spaced out over a month or more.

That's up to a month and a half before my customers could get relief. Even with my steam heater I was not getting a lot of success. The steam could only kill the eggs I could find them and many times the pressure from the steamer would send the bed bugs flying to the other side of the room where they would just walk away.

That's why I am now offering heat treatment. I was getting sick and tired of spending 4 and 5 hours doing chemical treatments only to get a call back from an angry customer. Heat treatment works because the heat penetrates everywhere. Chemicals, powders, freezing, etc. only work when you actually contact the bed bugs and most do NOTHING about the eggs.

It is impossible to find every egg and every bed bug, which is why all other treatment types fail miserably and why it takes so many retreats to even begin to get control. At 125°F all stages of bed bugs and their eggs die in under a minute. I usually achieve 100% eradication in the first heat treatment. Don't take it from me. Just Google bed bug heat treatment and see for yourself. More information on Bed Bug Control.

Bedbugs are exploding on the scene with a vengeance. Worldwide there are 92 described species of bedbugs. The two species most common in Maryland are the common bedbug and the eastern bat bug. Female bedbugs are round while males are more oval shaped. A female bed bug lays 200 to 500 eggs in her life time (about 5 eggs a day). It is now recognized that thermal remediation is the most effective way to kill bed bugs. At 125 degrees Fahrenheit BED BUGS AND THEIR EGGS DIE IN UNDER A MINUTE.

Chemicals and freezing only work when bugs are contacted and chemicals cant kill eggs. Heat penetrates everything and will kill all life stages of bed bugs plus there eggs and reach areas other treatments will miss. the major draw backs to heat is the cost and lack of residual kill (effect after treatment). Our heat treatments are 30 to 50 percent cheaper then our competitors and we will use chemicals in addition to heat. In addition we warranty our service for 60 days. More information on Bed Bug Control.

Good Housekeeping in Pest Control

Good Housekeeping in Pest ControlWhen dealing with pest problems it needs to be understood that your pest control professional can only do so much. Good housekeeping is an essential part of pest control protocol.

Clutter, crumbs, overflowing trash cans, and even taco shells and other carbohydrates not stored in Rubbermaid-like containers will ultimately defeat even the best treatment. Additionally, be careful to check for food that may have fallen under your refrigerator and behind your stove.

Remember, your exterminator is your partner, not your savior. Approach pest control as a team effort and watch your pest problems disappear. If you're having a problem with any household pests including: mice, rats, ants, termites, bedbugs, cockroaches, snakes, squirrels, or any other large or small pest we have fast service available. Please call us at: 443-562-9509 and we can help!

Independent Reviews - rate us!

  • Posted on 08/19/2014

We use Angie's List to assess whether we're doing a good job keeping valued customers like you happy. Please visit in order to grade our quality of work and customer service.

quoteAt first, we didn't know what to think. We starting hearing scampering noises above the ceilings of our second floor. There are woods behind our hou...quote
quoteMarc thank you SO much for coming out so quickly to "rescue" me from the 4 ft black rat snake I found in my basement. You and your team came out so qu...quote
quoteAfter 6 failed attempts from another company to get rid of bed bugs, we contacted At Once Pest Control. Marc made a special trip out to our home to a...quote

Marc Cohen Pest Control - Baltimore MD

My name is Marc Cohen and I was born here in Baltimore. I attended the University of Maryland and graduated with a BS in zoology and science education. Animals have always been my first love. Upon graduation I taught life science at the Jemicey School in Owings mills. I left Jemicey to start a business called Safari Party. For nearly 14 years I brought live exotic animals to schools and birthday parties. Although it was a great concept and kids loved it, it was not the best way to make a living.

Pest Control License # 28248-59492

At Once Pest • 5828 Deer Park Rd • Reisterstown MD 21136 • 443-562-9509