You are talking nonsense. Woodlice do not eat live plant material.
They are one of the essential animals which participate in converting
plant material to compost.

I use nippon to good effect to stop them coming in my house and,
contrary to
popular belief - or at least advice I've had in the past - they do
cause
damage in some things as above.

No.
Are you sure you know what a woodlouse is?

[snip]

Franz

Yes thank you very much and are you sure you need to be rude about it!
Perhaps you should try moving a curtain or pieceof furniture in your house
and having dozens and dozens of the things scrambling about. I could send
you some samples if you like as I have plenty to spare... :-)

Vicky