Click Beetles

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Identification

  • Colour Black, brown, or grey
  • Size From 2mm to 45mm long
  • Description Some click beetles have dark, round marks on their backs to mimic the eyes of larger animals. Their larvae are tan, white, and brown, and are known as wireworms, due to their slender, segmented, and shiny appearance.
  • Notes Their most recognizable feature is the click sound they make when grabbed or flipped upside down.

General Facts

Why do I have click beetles?

There are several different species of click beetles in Canada, six of which are destructive crop pests, due to the voracious appetites of their larvae.

Click beetles like to lay their eggs in bright, cultivated fields, among weeds or cereal crops, giving the larvae an immediate food source when they hatch a week later.

The larvae are attracted to the seeds and roots of crops like potatoes, beans, cotton, corn, wheat, carrots, beets, melons, onions, and strawberries. Turf grasses and ornamental plants can also be food sources for the growing wireworms.

By contrast, adult click beetles only feed on nectar, pollen, flowers, and soft-bodied pest insects like aphids.

Adult click beetles are attracted to light, but usually only invade buildings near the fields where they live, seeking shelter or looking for prey, rather than breeding or feeding.

They tend to enter your home through holes in doors or window screens, or gaps around windows, doors, eaves, and chimneys.

How worried should I be about click beetles?

In yards and gardens, click beetle larvae can harm fruits, vegetables, decorative plant bulbs, or lawn turf by drilling into tubers or eating away roots.

Given that click beetles can remain in the larvae stage for up to six years before developing into adults, they can cause significant damage year after year if not eradicated.

Adult click beetles are more of a nuisance. They do not bite, but their loud clicking sound and sudden flips can be startling.

If you decide to try one of the pesticides on the market to eradicate click beetles, make sure to choose one registered and labelled for that purpose, and follow the directions carefully. For a truly safe solution to your click beetle problem, you need a professional pest control service.

How can I prevent click beetles invading?

Check around doors and windows at night, Turn all nightlights off after dark, Reduce outdoor and indoor lighting, Repair holes in door and window screens, Seal cracks and gaps around the home

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