There are two main types of moths that eat wool. Here in Victoria, BC we see the Cloths Moth. These moths leave their larva casings behind after they have turned into an adult moth. The casings look like flat pieces of rice and can be the same colour as the rug depending on what colour of wool they were eating.
The other main type of wool eating moth is the webbing moth. I have never seen evidence of the webbing moth in Victoria before this week.
This week we had 3×5 wool area rug come in from Toronto, ON Canada. The owner lives in Victoria and had it flown out here. Since I am not used to seeing the webbing moth it would have been easy for me to over look the evidence. It is a good thing that I did months of research into moths and what to look for.
On the back of this rug it looked like weird dirt, for lack of a better word. Here is what the webbing moth leaves behind as it eats a wool rug.
Thanks for reading, RugloverMary, your local rug cleaning expert, and moth hater in Victoria BC, Canada