How Cold Can Kill Bed Bugs
Do-it-yourself Bed Bug Control
Can you get rid of bed bugs on your own?
Treating bed bugs is complex. Your likelihood of success depends on many factors, including:
- How many bed bugs you have;
- How much clutter is available for hiding places;
- Whether your neighbors have bedbugs; and
- Whether all residents of a house or building will participate.
Getting rid of bed bugs completely can take weeks to months, depending on the nature and extent of the infestation. To be successful, everyone will need to cooperate and do their part.
The following steps will help you begin:
You may have to follow these steps more than once to kill all the bugs and their eggs.
Identify the Problem
- Identify the pest:
- Collect a sample of the pest to show an extension agentExitor other insect expert.
- Extension agents can identify the pest at no cost to you. They are trained in pest control and know your local area.
Develop a Strategy
- Make a schedule for completing the steps below. Be sure to include any personal plans, such as vacations.
- Keep records through the whole process. Note the dates and exact locations where pests are found. This will help you track progress and better know where to target your work.
- Keep checking for at least a year after you’re done to make sure all the bed bugs are gone.
Keep the Infestation from Spreading
- Remove infested items. Place them in a sealed plastic bag and treat them. Learn more about treatment methods in the sections below.
- Items that cannot be treated should be placed in a sealed plastic bag and left there for up to a year to ensure any active bugs are dead.
- Empty the vacuum after each use. Seal the bag as tightly as possible and immediately throw it out in an outdoor trash container.
- Discard furniture responsibly if you can’t safely eliminate the bed bugs. Destroy it so someone else won’t be tempted to bring it into their home. For example:
- Rip covers and remove stuffing from furniture items.
- Use spray paint to mark furniture with "Bed Bugs."
Prepare for Treatment
Preparing for treatment is very important; it will make it easier to monitor for bed bugs that haven’t been eliminated. This preparation should be completed whether you are doing the treatment yourself or hiring a professional.
Kill the Bed Bugs
- Make sure the methods you select are safe, effective and legal. See What’s Legal, What’s Not.
- Considernon-chemical methodsof killing bed bugs. Some will be more useful than others depending on your situation. These and other methods can be helpful, but they might not get rid of the infestation entirely:
- Heat treatment:You can use a clothes dryer on high heat. You can also use black plastic bags in a hot, closed car in the sun, but success depends on your climate and other factors. Do-it-yourself heat treatments might not work. Professionals have access to more intensive and proven methods that can even treat whole houses with heat. You may also purchase a portable heat chamber, which is usually quite effective.
- Cold treatmentcan be successful in the home environment if the freezer is set to 0 o F. You must leave the items in a sealed bag in the freezer at that temperature for four days. Always use a thermometer to check the temperature, since home freezers are not always set to 0 o .
- Steam cleaners(wet or dry) can get into cracks and fabrics to treat carpets, baseboards, bed frames, and other furniture. The steam temperature must be at least 130 o F but should not have a forceful airflow, or it may cause bed bugs to scatter. Use a diffuser to prevent scattering.
Evaluate and Prevent
- Continue to inspect for bed bugs, at least every 7 days, in case any eggs remain. You can use interceptors, traps or other monitoring methods. Interceptors are placed under the legs of furniture to catch bed bugs and keep them from climbing the legs. Commercial and do-it-yourself interceptors are options.
- Continue to protect your home from bed bugs.
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Just How Cold Does It Have to Be to Kill Bed Bugs?
Most people have heard about the freezing treatment to kill bed bugs. Naturally, a question foremost on their mind is:just how cold should it be to kill bed bugs? If you are planning to use such freezing treatment to get rid of bedbugs, then read on for important information.
Latest research on bedbug freeze treatment
Recent studies have shown that bedbugs are no longer susceptible to cold treatment. The freezing method is simply not as effective as it once was in killing these critters. The same research has proven that the blood sucking parasites have become immune and developed a high tolerance to cold. Also the experiment showed that bedbugs eventually succumb to extreme cold, it takes several days to see results. Bedbugs are actually known to have developed high cold-tolerance by lowering their bodily fluid-freezing points. This freeze intolerant strategy helps them survive in extreme cold conditions.
The bed bug or Cimex Lectularius had disappeared for many decades but has made a comeback recently. Bedbugs are now known to infiltrate student hostels, hotels and motels, cinema halls, public transport systems, airlines, buses and even schools, assisted living facilities and hospitals. Many news reports have stated that several famous cinema halls in major cities like New York etc have actually been shut down thanks to bedbugs. Bedbugs feed on human and animal blood. They insert sharp proboscis in the mammal’s skin to suck the blood and this leaves red welts and itchy bumps on the victim’s bodies.
Bedbugs are notoriously difficult to get rid of.
People often use bedbug bombs, foggers, sprays and powders only to have the bugs back within a few days of this treatment. In the past, freezing treatment was known to have worked well but the new study published in theJournal of Economic Entomologyhas proven otherwise.
This aforementioned study was conducted in theUniversity of Minnesotawhere researchers froze the bedbugs in varying life stages. They also tested the effect of cold on fed and unfed bedbugs. They exposed the adult, eggs, nymphs and larvae of bedbugs to extreme cold temperatures of -5 deg Celsius for varying lengths of time. They further reduced the temperature to -16 deg Celsius and they found that the adult bugs survived at this temperature as well. The eggs of the bugs survived in short term exposure to even lower temperatures of -25 degrees C. The study ultimately proved that the adult bedbugscould be killed by cold only through exposure to temperatures of -16 degC or lower for a period ofatleast 80 hours.
This is the main reason why many museums and food facilities use standard practices of freezing possibly infested items to cold temperatures before displaying them.This safe method can also be used by homeowners dealing with bedbugs provided they have large freezers that can accommodate all infested items.
How to use cold treatment to effectively kill bed bugs? Just how cold should it be to ensure killing all bedbugs?
If you suspect any items of being infested, make sure you place them in a sturdy Ziploc®/freezer bags. This will ensure that the bugs do not die off elsewhere in the freezer. Also, bagging delicate items before freezing them will ensure that they do not get damaged thanks to changes in condensation or moisture. Make sure that you place all infested items in freezers having temperatures of at least -17.8 deg C for a period of 4 days.If the freezer is at a temperature of minus 20 deg C, then you can reducethe period to 48 hours. That is how long it takes to get rid of all bed bugs.
The aforementioned study also studied the effect of such supercooling on the feeding habits of bed bugs. The study then concluded that 100% of the bugs could be killed with minimum exposure of 80 hours at -16deg Celsius.
Bedbugs do not carry any diseases but simply having an infestation is socially unacceptable. So while the cold temperature can be effective in killing them one has to make the following considerations:
- Items that are not freezable need to be exposed to other means of supercooling. If you live in very cold place, you might consider putting infested furniture outdoors for a few days, where possible.
- Be sure to check if the air temperature where the bugs are located is indeed the same as the external temperature of at least -16 deg C.
- If the sun is shining, the little warmth can be enough to raise the temperature of the furniture in question and the freezing treatment may be rendered ineffective.
Cold or freezing treatment is usually enough for treating bedbug infested fabrics but for other items it is best to use other techniques of killing bed bugs described on this website.
Will Freezing Temperatures During the Winter Kill Bed Bugs?
Many of our customers are considering leaving their infested belongings out in the cold weather with the intent of killing the bed bugs with the freezing temperature.
We do not recommend this for a couple of reasons:
First, bed bugs are only effectively wiped out at temperatures at or below 0 degrees Fahrenheit; when bed bugs encounter temperatures of even a few degrees over 0, they can enter a hibernation that increases their chance of survival. Most states don’t normally even reach 0 degrees, and it’s unlikely that the items themselves will be cooled that low, due to the insulation provided by their construction.
To thoroughly wipe out a group of bugs, especially nymphs and eggs, you’ll need to maintain a temperature of 0 degrees Fahrenheit or less for at least 80 hours. Since even the coldest climates will rise above that during the day, leaving items outside simply won’t work. There’s too much fluctuation in outdoor weather.
While you could theoretically kill bed bugs by putting items in your freezer, it would be a bit impractical. You would need to ensure that your freezer is staying at or below 0 degrees Fahrenheit, and you would need to keep the items in there for at least 80 hours.
A better alternative would be to use a portable bed bug heater, such as the ZappBug Oven or PackTite Portable, which can safely and effectively kill bed bugs in just a few hours.
Top Ten Tips to Prevent or Control Bed Bugs
1. Make sure you really have bed bugs, not fleas, ticks or other insects.
You can compare your insect to the pictures on our Identifying bed bugs Web page or show it to your local extension agent.Exit (Extension agents are trained in pest control issues and know your local area.)
2. Don’t panic!
3. Think through your treatment options — Don’t immediately reach for the spray can.
Be comprehensive in your approach. Try other things first. Integrated pest management (IPM) techniques may reduce the number of bed bugs and limit your contact with pesticides. If pesticides are needed, always follow label directions or hire a professional. There is help available to learn about treatment options. (4 pp, 480 K, About PDF)
4. Reduce the number of hiding places — Clean up the clutter.
A cluttered home provides more places for bed bugs to hide and makes locating and treating them harder. If bed bugs are in your mattress, using special bed bug covers (encasements) on your mattress and box springs makes it harder for bed bugs to get to you while you sleep. Leave the encasements on for a year. Be sure to buy a product that has been tested for bed bugs and is strong enough to last for the full year without tearing.
5. Regularly wash and heat-dry your bed sheets, blankets, bedspreads and any clothing that touches the floor.
This reduces the number of bed bugs. Bed bugs and their eggs can hide in laundry containers/hampers Remember to clean them when you do the laundry.
6. Do-it-yourself freezing may not be a reliable method for bed bug control.
While freezing can kill bed bugs, temperatures must remain very low for a long time. Home freezers may not be cold enough to kill bed bugs; always use a thermometer to accurately check the temperature. Putting things outside in freezing temperatures could kill bed bugs, but there are many factors that can affect the success of this method.
7. Kill bed bugs with heat, but be very careful.
Raising the indoor temperature with the thermostat or space heaters won’t do the job. Special equipment and very high temperatures are necessary for successful heat treatment. Black plastic bags in the sun might work to kill bed bugs in luggage or small items, if the contents become hot enough. Bed bugs die when their body temperatures reaches 45°C (113°F). To kill bed bugs with heat, the room or container must be even hotter to ensure sustained heat reaches the bugs no matter where they are hiding
8. Don’t pass your bed bugs on to others.
Bed bugs are good hitchhikers. If you throw out a mattress or furniture that has bed bugs in it, you should slash or in some way destroy it so that no one else takes it and gets bed bugs.
9. Reduce the number of bed bugs to reduce bites.
Thorough vacuuming can get rid of some of your bed bugs. Carefully vacuum rugs, floors, upholstered furniture, bed frames, under beds, around bed legs, and all cracks and crevices around the room. Change the bag after each use so the bed bugs can’t escape. Place the used bag in a tightly sealed plastic bag and in an outside garbage bin.
10. Turn to the professionals, if needed.
Hiring an experienced, responsible pest control professional can increase your chance of success in getting rid of bed bugs. If you hire an expert, be sure it’s a company with a good reputation and request that it use an IPM approach. Contact your state pesticide agency for guidance about hiring professional pest control companies. Also, EPA’s Citizen’s Guide to Pest Control and Pesticide Safety provides information about IPM approaches, how to choose a pest control company, safe handling of pesticides, and emergency information.
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What Temperature Kills Bed Bugs?
Can Heat or Cold Kill Bed Bugs?
While bed bugs are sensitive to changes in temperature, there are plenty of myths about what temperature kills bed bugs.
The pests cannot be eliminated simply by turning off heaters in winter or sitting infested items outdoors on a sunny summer day. In fact, only extreme temperatures beyond what can be achieved naturally will get rid of them.
Temperature-Related Bed Bug Control
Using freezing cold temperatures to kill bed bugs is one option. Put an infested object, such as bedding or pillows, in a sealed plastic bag, then put it in a freezer at zero degrees Fahrenheit for about four days.
Temperature That Kills Bed Bugs
A similar process can be used with heat. Adult bed bugs die at 119 degrees Fahrenheit, and their heat-resistant eggs require temperatures upwards of 125 degrees. Some infested objects can be safely baked in the oven at these temperatures for three to five hours to get rid of the pests.
Safety should always be considered in deciding whether to treat in this manner.
Frozen carbon dioxide sprays and heat distribution systems exist but require special equipment and expert monitoring.
The Whole-Home Bed Bug Solution
Homeowners can use extreme temperature to kill bed bugs in a limited sense, but DIY heat or cold treatments aren’t a practical solution for house-wide infestations. In addition to letting bed bugs in floorboard cracks and walls escape, this control method won’t work for infested items that aren’t safe in extreme conditions or too big to fit in the freezer or oven.
The pest specialists at Orkin have a wide variety of tools and knowledge at their disposal and are able to assess the situation to find the best bed bug solution for your home.