Sap beetles
Various species in the Genera Carpophilus, Glischrochilus

Classification

Secondary pest: Fungus feeder
Order: Coleoptera
Family: Nitidulidae
Acronym: CAR

Description

  • Adults are 2 to 4 mm in length, oval, flattened and light brown to black in colour.
  • Elytra are often shortened, exposing 2 or 3 abdominal segments.
  • Elytra often with 1 or 2 yellow to reddish brown spots.
  • Antennae end in 3-segmented, flattened club.
  • Sap beetles are highly mobile.

Similar species

  • Other species within the same genera are similar in appearance

Commodities affected

  • Sap beetles feed on stored grain, dried fruit, fresh fruit, flowers, fungi, carrion
  • Some feed on sap of trees and juice of fruits

Signs of infestation

  • Presence of holes in commodity
  • Presence of adult beetles in sometimes large aggregations

Damage

  • Larvae and adults both feed but damage is not distinctive.
  • Larvae may burrow into mouldy grain residues.
  • Adults will feed on dried and ripening fruit where their pest status is most significant.
  • Sap beetles may transmit mould spores, bacteria and yeasts.

How to control

Geographic range

  • Are distributed worldwide and across Canada
  • 2 species are most important in Canada: the dried fruit beetle, Carpophilus hemipterus (L.) and the four-spotted sap beetle, Glischrochilus quadrisignatus (Olivier)

Where found

  • Are attracted by moulds and yeasts on potential foods
  • Are important pests of ripening fruits

Life history

  • These beetles have a very high fecundity, a single female is able to lay up to 1000 eggs over a 3 to 4 month period
  • Females lay eggs on or in food
  • Larvae are active and move amongst the food, burrowing into food material
  • Adults will fly readily
  • Populations develop rapidly

Images

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Did you know?

The Nitidulidae is a large family of beetles with approximately 3000 species world wide.