Coconut fiber bad for millipedes rumor?

[LurkingUnderground]

First thing that came to my mind is some coir has hit the market that's been treated in a persistent fumigant.
Coir: 5% water soluble, Pectin compounds 3%, Lignin 45%, Cellulose 43%, +ash and celluloid compounds. Pretty high in Lignin. (Lignin: natures glue. Analogous to carpenters glue.)
Don't know about pedes but termites would consider that stuff a passable dinner.

Would that be why you would want to find eco earth friendly bulk ingredients?