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Pestgon FactSheet
“
If they fly they die…if they crawl they fall”
GROUND BEETLES (coleoptera
/ carabidae)
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Description:
Ground beetles are referred to as "Carabids". They range from 1/16
to 1-3/8 inches long. They appear somewhat flattened and generally elongate,
with threadlike antennae and hard wing covers that meet in a straight line
down the center of the back. The wing covers have numerous parallel ridges
running lengthwise. Ground beetles make up one of the largest groups of beetles
in North America. There are more than 2200 species. With some variation in
their body shape and coloring, most are shiny and black.
Biology:
Adults are active at night and tend to hide under rocks and moist debris
during the day. They will run when exposed. They forage at night and feed
on insects and their larvae. Likely targets include caterpillars, root maggots,
snails, and other soft-bodied insects.
Economic Impact:
Ground beetles are very common "outdoor" insects that occasionally
become pests by wandering into buildings by mistake. They do not damage structures
or furnishings and are harmless to people and pets. They are actually beneficial
because they feed on insect larvae. However, large numbers are occasionally
present and they become more annoying than beneficial. Pestgon finds that
their presence in commercial buildings is therefore more of an image problem
requiring their control and removal.
Management Methods:
Beetles may enter into structures by crawling through small openings or under
doors. They prefer the outdoors and if left inside will die in a short time.
Since ground beetles are beneficial insects, harsh pest control methods are
usually not necessary. However, if they are creating a nuisance be getting
inside, Pestgon recommends the removal of leaves, mulch and debris around
the perimeter of the buildings. This will usually be sufficient. Caulking
and weather-stripping entry points will eliminate their getting in to a building.
Spot treating with baits labeled for such application may be necessary to
control extremely high populations from becoming a nuisance.