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Curious about Cluster fly? Here’s the Q&A!

Q: What is the scientific name for Cluster fly?
A: Pollenia rudis (meaning “stick of pollen”).

Q: What does the Cluster fly look like?
A: Adults are about 0.35 in. The thorax is dark greyish-olive color and covered with golden hairs. The abdomen has a checkered pattern. At rest, wings are folded tightly on top of the abdomen.

Q: How do Cluster flies live?
A: Cluster fly larvae parasitize earthworms and pollinate plants. There are three generations per year. Within structural spaces, especially residential homes, Cluster fly is slow and readily over-winters or undergoes torpor in large numbers.

Q: How is the Cluster fly a pest?
A: Cluster flies offend our sensibilities, but do not contaminate human food. As temperatures drop, Cluster flies invade structures to over-winter. On sunny days, Cluster flies are observed on western and southern windows, and within structural spaces. During brief activity, Cluster flies exhaust their energy and spin upon surfaces.

Q: How is the Cluster fly controlled?
A: Control Cluster flies with PestWest’s exclusive Window Wonder Trap combined with the powerful synomone Cluster Fly Lure.

Q: How is the Window Wonder Trap and Cluster Fly Lure used?
A: Place Window Wonder Traps with Cluster Fly Lures year-round, but in greater numbers during the early fall.

Q: Is there another method of Cluster fly control?
A: Yes, within more sensitive structural spaces, such as working and living areas, install several PestWest *Mantis® 1×2, *Mantis® 2×2, Mantis® Uplight, or Mantis® Uplight Max36 glue board insect light traps. Within less sensitive structural spaces, such as attics and storage areas, install several powerful PestWest *Titan® Alpha and *Titan® 300 electronic fly killers or mass capture systems.

Q: How can Cluster fly structural invasions be reduced?
A: In late summer, exclude Cluster flies by checking windows, doors, and utility lines for good repair, and seal exterior openings. Combine exclusion with applications of a properly labeled insecticide (chemical fences).

*Prior to any attic or spatial deployments of Mantis and Titan systems, check and comply with all electrical and fire codes. Deploy all systems PestWest Instructions for Use.


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