Small hive beetle
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What it actually does
The adult beetle is small, dark and fast, and it runs from light when you open a hive. The damage is done by the larvae, which tunnel through comb, eat brood and pollen, and defecate in honey. The honey ferments, runs, and smells of rotting oranges. A super can be lost in days.
A strong colony polices beetles and confines them. Colony strength is the main control, which is why beetle damage usually follows some other problem rather than starting one.
Telling it from wax moth
Both produce larvae tunneling through comb and people confuse them constantly. eXtension publishes a direct comparison, and the practical difference is this: wax moth larvae leave silk webbing and small hive beetle larvae do not. Beetle larvae have three pairs of legs at the front, wax moth larvae have prolegs all along the body.
The distinction matters because wax moth is a stored-comb problem and beetle is a live-colony and harvested-honey problem, and the responses differ.
When it becomes a problem
- A weak or queenless colony that cannot patrol its own comb.
- Too much space, where a small colony is asked to hold more boxes than it can cover.
- Harvested supers left standing, which is the fastest route to a ruined crop.
- Warm and humid conditions, which suit the beetle more than the bees.
Managing it
Keep colonies strong and keep them tight, so there is no comb the bees are not covering. Traps that exploit the beetle's habit of running into dark crevices work and are cheap. Requeen a weak colony rather than nursing it through a beetle problem, because strength is the control.