Woodworm identification involves looking for signs of activity, including small, round exit holes in wood, fine powdery dust or frass, and tunnels within the wood. These signs indicate that wood-boring beetles are present and have been feeding on the wood.
Here's a more detailed look at how to identify woodworm:

1. Look for Exit Holes:
Location:
Small, round exit holes, typically 1-3mm in diameter, are a classic sign of woodworm infestation.

Appearance:
These holes are formed when adult beetles emerge from the wood after completing their life cycle.

Fresh vs. Old:
Fresh holes will have clean, light-colored edges, while older holes may be darker and dusty, according to Garratt's Damp and Damp2Dry Solutions.

2. Examine for Frass:
What it is: Frass is a fine, powdery dust or sawdust-like material that woodworm larvae leave behind as they tunnel through the wood.

Where to look: Frass is often found around the exit holes, on the surface of the wood, or under furniture.

Fresh vs. Old: Fresh frass will be a pale color, while older frass will be darker.

3. Check for Tunnels:
How to identify: Tunnels are the result of woodworm larvae boring through the wood.
Location: Tunnels are often visible when looking at the wood's surface or when inspecting floorboards, beams, or furniture.
Signs of activity: Tunnels can be accompanied by frass and exit holes, indicating an active infestation.

4. Inspect for Weakened or Crumbling Wood:
What to look for: Infested wood may become weak, brittle, or crumble when touched or tapped.

Reasoning: Woodworm larvae weaken the structural integrity of the wood as they tunnel and feed.

5. Consider Other Signs:
Live or dead beetles:
Adult woodworm beetles may be present in the area, especially if they are emerging from the wood.

Increased beetle activity:
A sudden increase in the number of beetles, some flying, some crawling, can be a sign of infestation.

Dust or frass accumulation:
Fine powdery dust or frass accumulating around furniture or under floorboards may indicate an active infestation.

Important Notes:

Not always visible: Woodworm larvae are not always visible as they tunnel through the wood.

Early detection is key: If you spot any of these signs, it's crucial to take action to prevent further damage and spread.

Seek professional help: If you're unsure about the extent of the infestation or if you're unable to address the problem yourself, consider contacting a professional pest control service.