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I have used Silica gel for silverfish for over 30 years. I buy it at craft stores, and place scatter about a teaspoon on the back of shelves, and in corners whenever I set up a new shelf or move. I have also used slightly more than that in boxes when I get in new /old books or records either one. I had a bad problem back in the 1970s and checked with the extension office, they recommended this method. I have seen it recommended other times as well in more recent years. You control humidity this way, and also the coarse material also deters them. I bring in a lot of boxes of both books and records, some of which have had silverfish. I have found this to be a very effective and safe method.
 
 

Dr. Cheryl Thurber 

email: [log in to unmask]

--- On Thu, 5/21/09, Marie O'Connell <[log in to unmask]> wrote:


From: Marie O'Connell <[log in to unmask]>
Subject: [ARSCLIST] Pest Control
To: [log in to unmask]
Date: Thursday, May 21, 2009, 4:55 PM


*What experience do people have with pest control with particular regard to
audio collections and silverfish?*

**

*At this stage we think that the population is relatively small, but are
looking into ways to prevent its further spread and cautiously considering
some sort of treatment or fumigation. Our main concern is that any chemical
treatment be safe for all media types and safe for staff.*

**

*Generally speaking, what treatments and information have you found useful?*

*We have discussed an insecticide called PERMIGAS, Does any one know about
this?*

**
*PERMIGAS Ingredient Formula Conc. CAS No.*
*CARBON DIOXIDE CO2 90% 124-38-9*
*SOLVENT NAPHTHA, LIGHT ALIPHATIC 9% 64742-89-7*
*PIPERONYL BUTOXIDE C19-H30-O5 0.5% 51-03-6*
*PYRETHRIN II 0.1% 121-29-9*
*PERMETHRIN C21-H20-Cl2-O3 0.4% 52645-53-1*
**
*Thanks in advance.*
**
*Marie*