The white Powder that comes out of wood is wood powder that is a sign of wood boring beetles.
When you see white powder coming out of wood or non clumpy powder on or near the wood it means the infestation is most likely active.
Woodworms can also be in the wood and yellow clumpy powder in the wood or on the wood is a sign of an old infestation.
The term wood boring beetle encompasses many species and families of beetles whose larval or adult forms eat and destroy wood.
In the woodworking industry, larval stages of some are sometimes referred to as woodworms.
After termites, wood-boring beetles are the most important wood-destroying insects in homes.
The amount of damage that wood-boring beetles cause depends on many factors.
There are several options for control of Wood Boring Beetles which include removal and replacement of the wood if it is an isolated infestation, surface treatment of the wood when the infestation is in an accessible area, and fumigation for areas of infestation that are inaccessible but still require treatment.