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How to Get Rid of Caddisflies

Caddis flies are related to moths and butterflies. They have four hairy wings and inhabit water systems. Caddis fly larvae is aquatic, and the fly only leaves the water when maturing to adulthood. There are over 900 species of caddis flies in North America. Caddis flies become annoying when they swarm in great numbers around light sources. Although caddis fly infestations only last for a couple of days, there are a number of ways to control these populations in your building.

Things You'll Need

Dichrom yellow lights or sodium vapor lights
Flying-insect spray
Hand sprayer
Protective clothing
Hand-held electric fly swatter

Instructions

- 1
  Reduce caddis fly numbers by changing exterior lights. In large commercial buildings, change mercury vapor lights to sodium vapor lights. The caddis flies will no longer be attracted in swarms. In homes, install the yellow "bug lights" instead of incandescent bulbs. Switch off unnecessary exterior lights to prevent caddis fly infestations.
- 2
  Read the instructions carefully on the insecticide label. Make sure the spray is suitable for caddis flies. Mix the insecticide according to the instructions. Wait until the caddis flies are swarming around exterior lights, and spray liberally with insecticide.
- 3
  Use an electric, hand-held fly swatter to eradicate caddis flies in your home. Hold the handle of the fly swatter, and touch the wire mesh to the caddis fly. The fly will be instantly electrocuted. This system is effective and reduces the mess caused by squashing insects.

Insects & Science