How to Get Rid of No See Ums

How to get rid of No See Ums

No see ums are a nuisance because of their tiny size. They can fit through spaces in typical window screens and so people who live near marshes or swampy environments may see No see ums enter the home frequently. True infestation indoors is impossible because they are unable to breed without a moisture source, nor can they develop without a moisture source. Therefore, the best ways to control infestations are to target nests that are located outdoor and close to your home.

Outdoor Control:

You can prevent No see ums from entering the home by creating a barrier around the perimeter of your home. Using a liquid concentrate insecticide like FenvaStar EcoCap or FenvaStar Plus-Esfenvalerate that is diluted with water and sprayed with the Chapin Gallon Sprayer around the perimeter of your house, will help prevent entry of the No see ums. You should pay close attention to your window screens, window frames, door frames and screens, and any crack or crevice that may serve as an entry point for these insects. If possible, the screening should be changed to a super-fine mesh to keep No see ums from entering through these areas.

Non-residual misting concentrates like Riptide Waterbased Pyrethrin ULV and EcoExempt MC & EcoEmulsifier can also be applied in areas of heavy infestation for a fast knock down and instant gratification.  Archer IGR is recommended to be added to the solution so that the reproduction of No see ums can be controlled. A fogger or an automatic misting machine can be used to dispense the solution.

Indoor Control:

No see um stragglers may enter the home at any given time during the summer season. If the flies have entered, aerosol sprays like Microcare Aerosol Spray may be applied indoors.
You may also want to consider creating “shields” from the inside using the liquid concentrate insecticides to focus on windows and door frames.

FenvaStar EcoCapFenvaStar Plus-EsfenvalerateChapin

Riptide Ecoexempt

Archer IGR



Date: Friday, 11. February 2011 15:09
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  1. 1

    That’s great advice you have written for us. The only problem is that they have a nesting area in my house and we can’t find where it is?

  2. 2

    Hi Samantha,
    It seems like you may have a leaking problem or some mechanical damages that need to be fixed. You may have to inspect the basement or crawlspace area. Unfortunately though, we do not have any insecticides that have no-see-ums on the label. Although midges are labeled on Onslaught, they are not exactly like no-see-ums that you may be finding in your home. First off though, you should definitely have the mechanical structure checked out or you may have a returning infestation no matter how much pesticide you spray. If you can get an inspection done to find the source, by getting rid of the source altogether, you may have better chances of eradicating the infestation.

  3. 3

    I have these in my swimming pool, how do I kill them?

  4. 4

    Hi Alaina,

    I’m assuming that they are around your swimming pool and in that immediate area because although they thrive in areas of high moisture, I’m not sure if they would be able to survive in a pool of water that has chlorine in it. Unfortunately though, we do not have any insecticides that can be applied around the pool area. You may have to have professionals go to inspect and control them in the pool area. I apologize that I was not able to better assist you.

  5. 5

    I enjoy sitting on my lanai in sw Florida but hate the tiny no see ums biting me! Our lanai is screened so what can I do to get rid of them?
    Thank you

  6. 6

    Hi Susan Barker,
    It may be that the screening on your lanai is not fine enough to keep the no see ums out. The hole sizes may be too large and that’s essentially why they are able to make it inside. We recommend changing the screening so that you can keep them out. Unfortunately, we do not have any products that have no see ums on the label. The only product we have that have similar pests on the label, like biting midges, is Onslaught Insecticide. If you have any further questions or comments, please feel free to contact us again.

  7. 7

    I am desperate! For several weeks my husband and I have been getting bit in our room while we are sleeping. It only happens at night after the lights are out. We spray inside and out, I put repellant on, wear long sleeves;yet any exposed skin gets bitten. We are guessing it is noseeums because we never hear or see them. What can we do?

  8. 8

    Hello Tracy Richardson,
    Unfortunately, there are more pests than just no see ums that will silently bite you in your sleep. We definitely recommend getting an inspection done before any pesticides are applied. An inspection will help you identify the pest, gain a better understanding of the biology of the pest, which will help you efficiently eradicate the infestation. Moreover, you do not want to apply any insecticide until you have identified the pest and have a treatment plan so that you can avoid all potential hazards with spraying chemicals. If you have any questions or comments, please feel free to let me know.

  9. Barbara Camejo Nelthropp
    Monday, 29. October 2012 19:13

    I live in the us virgin islands and Florida. I develop sores after getting bitten by no see ums. I have tried everything on the market including deet based products and still I get bitten constantly. It seems that in the past 2 yrs it has become worse. Morning, noon or night not just sunrise and sunset; it’s all day long that I get bitten unless I’m indoors with air conditioning which we do not have while in St Croix USVI.

    We live by the ocean on a farm and have ponds around us as well. I’m at the point of desperation. I wear long sleeves, long pants socks etc they bite right thru my clothing. I use a mosquito net around my bed so I don’t get bitten while sleeping. The only thing I haven’t done is change the screens because I’m afraid it will decrease the air flow since we don’t have A/C.

    I’ve contacted the CDC and NHI for advise and they really haven’t given me any answers either.

    Can you help?

  10. 10

    Hi Barbara Camejo Nelthropp,
    Honestly, one of the safest and most effective parts of control is mechanical and structural control. It sounds like you are not willing to change the screens, but we can tell you that this is going to be one of the most crucial parts of control. Since you cannot change the environment around as far as the ponds and beaches are concerned, you will have to either relocate or change the structure so that you can keep out pests. Ponds and beaches not only are the sources of no see ums, but you can have some major issues with mosquitoes, ticks, and other pests. Currently, we do not have any insecticides that have no see ums on the label. You may need to get your structure treated by professionals with the proper insecticide. If you have any further questions or comments, please feel free to contact us again.

  11. 11

    Hi,my name is Mary,and i live in Dallas Tx i have been bothered by no see ums in my home for 7 months now there even in my car i have tried booms sprays and still cant get rid of these things any suggestions and how can i get them out my clothes

  12. 12

    Hi Mary,
    As for your clothes, we recommend washing and drying them in hot temperatures. We don’t have any insecticides with no see ums on the label and the only insecticide that we can recommend is Onslaught Insecticide, which have biting midges on the label. Onslaught can only be used on cracks and crevices and cannot be applied as a broadcast application on the floor or furniture. If you have any further questions or comments, please feel free to contact us again.

  13. 13

    We bought OnSlaught through a distributor in Brandon, FL and he told us to apply to all surfaces inside our house. We have a heavy infestation of what we were told by a pest control company it was No see ums (biting midges) inside our house and no problems with any leaks, standing water, etc. We have checked every where inside our house and cannot find a nest. They seem to be breeding in the furniture and carpet. Four applications of OnSlaught has not helped one bit. We even had the house tented this week and it didn’t do anything. Any other suggestions? Like I said one pest control looked at our samples and told us it was biting midges but didn’t want to fumigate. Seems like nobody wants to deal with the problem.
    Desperate in Plant City, FL

  14. 14

    Sorry to hear of your biting midges problem. They are one of the most challenging pests to get rid of because of their size and numbers. Onslaught is a good product to use, but it may need a little kick from a synergist to help boost the effectiveness of the insecticide. I would highly recommend you try using Exponent (Synergist) with the Onslaught.

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