Ground Beetles

Identification

  • Colour Black or dark in colour, with metallic hues of blue, green, orange, red, yellow, or copper
  • Size From 2 mm to 25 mm long
  • Description Oval and elongated, with three pairs of legs and two pairs of wings. These beetles also have prominent mandibles.
  • Notes Will run quickly and scurry for cover when disturbed.

General Facts

Why do I have ground beetles?

There are more than 800 species of ground beetles in Canada alone, making them the most frequently encountered beetles in yards and gardens.

They usually live in the soil under logs, rocks, wood, leaves, boards, and other debris in agricultural areas like fruit orchards, eating garden pests and plants. They are very active at night.

However, they are attracted to light and in summertime can congregate around well-lit homes and businesses, before entering all at once and creating an infestation.

They gain access through cracks, crevices, and other small openings, and can be found hiding in damp basement areas or under objects on the floor.

How worried should I be about ground beetles?

Ground beetles actually have many benefits, preying on garden pests like ants, aphids, caterpillars, maggots, slugs, and worms.

However, some ground beetles eat the seeds, shoots, and pollen of plants, even eating seeds of corn, potentially destroying a harvest.

These beetles can cause alarm when they enter buildings, and some can release odorous secretions. But they do not reproduce indoors, pose a health threat, or damage property.

While smaller infestations of ground beetles can be vacuumed up, captured in a container, or caught in sticky traps, larger infestations require the help of a professional pest control, to ensure the proper application of insecticide and to prevent the pests coming back.

How can I prevent ground beetles invading?

repair and seal cracks, crevices, and openings, keep mulch away from the building foundation, reduce the level of outdoor lighting, use yellow light bulbs instead of bright white ones, keep yard free of rocks, wood, leaves, and other debris

Other pests related to Ground Beetles

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