A to Z of Pests

Merchant Grain Beetle

Oryzaephilus mercator

Appearance

• Adult — 2.5–3mm in length. 6 saw–like projections on each side of the thorax. Short length of head behind the eyes.
• Larva — yellow to brown with a black head.

Lifecycle

• Optimum conditions are 30–33°C. Cannot tolerate low temperatures.

Habits

• A particular pest of dried fruit and chocolate.