How big is the rug?  IF - it is not too large and IF you have a good pest 
control company, you can do a “mini fumigation” with DDVP strips placed into  
sealed 4mm plastic covering. Keep the rug with a few strips sealed in a warm 
place for 2 weeks and have the pest control company take it outdoors and “air 
it out” using respirators and goggles to do so.  The gas penetrates the fibers 
and kills all life stages as a fumigation does.  Dichlorvos is a “true gas” 
just as Vikane is.  DO NOT ATTEMPT THIS WITHOUT THE HELP OF A LICENSED PEST 
CONTROL COMPANY.   Dichlorvos (as used in Nuvan strips) is a restricted use 
pesticide - not for untrained folks to handle. 

 



> On Apr 16, 2025, at 12:57 PM, Voron, Joel <[email protected]> wrote:
> 
> On paper yes those temperatures could work but I would do two cycles with a 
> few months bagged and observe period if you don’t need the object right away 
> and only if that’s your last resort. I would lobby for a proper colder 
> freezer in a secure location though. For example it’s a security risk to 
> treat an object in say a cafeteria freezer or an outside freezer not in a 
> secured location even if it has a padlock on the door.  Jist the action of 
> moving an object from one building to another part of the campus invites 
> risk. Also  the benefit of future use of a freezer just to prevent pest 
> issues is such a plus. I would try to get buy in to purchase one. Doesn’t 
> hurt to ask and if they shoot you down then maybe ask again in a year or so. 
> JTV 
> 
> Get Outlook for iOS <https://aka.ms/o0ukef>
> From: [email protected] <mailto:[email protected]> 
> <[email protected] <mailto:[email protected]>> on behalf of 
> Wendi Field Murray <[email protected] <mailto:[email protected]>>
> Sent: Wednesday, April 16, 2025 12:18:16 PM
> To: [email protected] <mailto:[email protected]> 
> <[email protected] <mailto:[email protected]>>
> Subject: [PestList] Proper freezing temps for pest mitigation
>  
> [CAUTION: This message originated from outside the Foundation. Do not click 
> links, open attachments or take action unless you know the contents are safe]
> Hello,
>     We recently received a woven woolen rug for our collection that shows 
> signs of clothes moth activity (frass, casings, eggs) and we would like to 
> mitigate with a low-temperature treatment before cleaning and introducing to 
> our collections storage space. According to Museumpests, the ideal 
> temperature should be sustained -20 F for 72 hours, though I cannot find a 
> freezer on our campus that gets below a range of -10 to 10 F. Is this 
> sufficient, or is there too big a risk they would survive the treatment at 
> that temperature? 
>  
> Just need to know if there is wiggle room in the temp recommendations, or if 
> I can justify a request from my institution for a colder freezer and/or 
> anoxic treatment.
>  
> Thank you!
> Wendi
>  
> <image001.png>
> WENDI FIELD MURRAY, PHD
> COLLECTIONS MANAGER/REPATRIATION COORDINATOR, Archaeology & Anthropology 
> Collection
> COLLECTIONS MANAGER, East Asian Art & Archival Collection
> Wesleyan University | Olin Library
> Exley Science Center, 301 | Middletown, CT 06459
> P. 860 685-2085 
> pronouns: she/her/hers
> 
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Dr. Jill Gordon
Urban Entomologist
Mantis Consulting
86 Crease Rd
Mt. Olive NJ 07828
(973) 945-1776
[email protected]

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