LambdaStar UltraCap 9.7 and Cyper WSP are effective products for cluster fly pest control, according to Do Your Own Pest Control. Other recommended products include D-Fense Dust, CB-80 and PT 565.
LambdaStar UltraCap 9.7 is a liquid residual insecticide that does not stain or emit odors. The most effective locations to apply this product include the property perimeter and household entry points, such as doors and windows. LambdaStar UltraCap 9.7 has strong staying power and does not require frequent reapplication. Cyper WSP is a similar but less tenacious product that users must apply frequently.
CB-80 is an aerosol insecticide effective against cluster flies, cockroaches and more than 20 other species. Its principal active ingredient is pyrethrin, a compound extracted from chrysanthemums.This quick-killing product is safe for use in kitchens and other food-preparation areas.
PT-565 is another aerosol product that kills and repels cluster flies. It is most effective when applied at room temperature. PT-565 is a residual insecticide, but users may also spray it directly on visible insects.
D-Fense Dust is a powder insecticide that kills many insect species, including cluster flies, roaches, ants, bees and ticks. This moisture-proof product has no odor, does not stain and is safe for indoor and outdoor use. It is also a safe option for barns and other animal containment areas. One application lasts approximately eight months.