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Cluster Flies: How to kill and get rid of Cluster Flies

Recommended for Cluster Flies

Prevention of Cluster Flies: Use a long-lasting residual insecticide such as LambdaStar UltraCap, Cyper WSP, or Bifen IT during the fall months. Fall time is when cluster flies start to seek shelter and "overwinter" in your home. LambdaStar UltraCap will remain on the surface than Bifen IT. Cyper WSP will leave a visible film that can be seen on dark surfaces.

  • Spray the exterior walls where these Cluster Flies are likely to land, predominately on the south and western sides of the house. Spray around the door frames, window frames, eaves and soffits as well.
  • Spray the perimeter or surrounding soil with LambdaStar UltraCap, Cyper WSP, or Bifen IT during the spring and summer months to help minimize any Cluster Fly populations and subsequent entries.

Active Cluster Fly Infestations: Once the Cluster Flies have entered your home for overwintering, not much can be done to solve the problem. Vacuum the flies that are causing a nuisance. You can also try an aerosol that kills on contact wit pyrethrum, such as CB-80 or PT565

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  1. Lambdastar UltraCap 9.7-16 oz

    Starting at: $49.90

    LambdaStar UltraCap 9.7 is a micro-encapsulated lambda-cyhalothrin formulation that is easy to measure and mix. It has a long residual protection with excellent results. Compared to Demand CS, also a lambda-cyhalothrin 9.7% formulation, LamdaStar UltraCap has a higher mortality rate after 12 weeks of testing.  

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  2. Cyper WSP-Envelopes and Pail

    Starting at: $10.18

    Now Cyper WP comes in water-soluble packets for mixing convenience. Cyper WSP compares to the popular Demon WP envelopes, with the same active ingredient, 40.0% Cypermethrin.

    Cyper WSP achieves a quick knockdown and long-lasting control of 30 nuisance pest.

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  3. Bifen IT

    Starting at: $18.08

    Many customers use Bifen IT for mosquito control in their backyards. Mosquitoes feed on plant juices. You find them on the leaves of plants, bushes, and trees. Try to spray the underside of the leaves. Remember that Bifen IT is non-selective and will kill the good guys such as bees and butterflies so avoid spraying any flowering parts because that is where the bees go. We need to save the bees!!! The 3/4 gal size is the best value, but consider the one gal container because it has a tip and measurement device. The tip and measure makes life easier when mixing. Learn More
  4. CB 80 Extra Insecticide Aerosol

    CB 80 Insectide Aerosol

    Active Ingredient: 0.50% Pyrethrins 4% Piperonyl Butoxide

    CB-80 has earned an outstanding reputation for ultra-fast knock down and kill of cockroaches and over 20 other pests. It is ideal as a space or crack and crevice spray. CB-80 boasts a broad list of use areas, including restaurants and other food-handling establishments, meat packing and food processing plants, food storage areas, hospitals, supermarkets, motels and hotels, residences, utilities, and transportation equipments.

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  5. PT 565 Plus XLO Aerosol

    565 Plus XLO Contact Insecticide with pyrethrin provides a quick knockdown and has flushing capabilities. It may be used as a space spray or directed contact spray with its crack and crevice tip. As a low odor insecticide, It is perfect for inspecting for insects as if flushes them out of their hiding areas. It kills a broad range of flying and crawling insects.

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  6. Defense SC -PT and Gallon

    Starting at: $34.89

    D-FENSE (Defense) SC (Compare to Suspend SC) is a concentrated suspension of pure microcrystals of the active ingredient Deltamethrin. Learn More
  7. revenge window fly catchers

    Revenge Window Fly Traps fly paper to use on windows to catch flies
    Packaging: Each box contains 4 traps
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