This is a message from the Museumpests List. To post to this list send it as an email to [email protected] To unsubscribe please look at the footer of this email. -----------------------------------------------------------
Lou - It is true about bed bugs; they're tough critters. However, there's no way they are going to survive 72 hours at -20 F or -15 F, or even 0 F. Tom -----Original Message----- From: Louis Sorkin <[email protected]> To: pestlist <[email protected]> Sent: Sat, Mar 10, 2012 11:11 pm Subject: RE: [pestlist] Freezer Trucks This is a message from the Museumpests List. To post to this list send it as an email to [email protected] To unsubscribe please look at the footer of this email. ----------------------------------------------------------- If you happen to have bed bugs (funny I should mention them!) in boxes (I've seen office records with bed bugs from clients, workers, other people's homes), taking it down to 32F is no where near sufficient. In fact, taking it down to -30F for a few hours doesn't kill them either; they just warm up and wake up after bringing the material back to room temp. Louis N. Sorkin, B.C.E. Entomologist, Arachnologist Division of Invertebrate Zoology American Museum of Natural History Central Park West at 79th Street New York, New York 10024-5192 [email protected] 212-769-5613 voice 212-769-5277 fax The New York Entomological Society, Inc. www.nyentsoc.org [email protected] From: [email protected] [[email protected]] on behalf of Anderson, Gretchen [[email protected]] Sent: Saturday, March 10, 2012 10:20 PM To: [email protected] Subject: RE: [pestlist] Freezer Trucks This is a message from the Museumpests List. To post to this list send it as an email to [email protected] To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Dana - In addition you need to realize that boxes of archives are very dense - and that paper is very good insulator. In fact, shredded paper is used to insulate houses in northern climates. Given that, it is not surprising that it took time to reach the the desired temperature. Be patient - the method works. Gretchen Anderson Conservator Carnegie Museum of Natural History From: [email protected] [[email protected]] on behalf of [email protected] [[email protected]] Sent: Saturday, March 10, 2012 8:58 PM To: [email protected] Subject: Re: [pestlist] Freezer Trucks This is a message from the Museumpests List. To post to this list send it as an email to [email protected] To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Dana - First of all, the temperature does not have to reach -20F in 4 hours. It should reach 32F in 4 hours. That's sufficient. The reason you use a truck capable of maintaining -20F, is it will reach the desired 32F in 4 hours. Once the liquid in adults, larvae, and eggs reaches a freezing temperature, ice particles form and destroy the cellular structure of the living organisms. Unless you're dealing with "book worms", which I doubt you are with archival records, any insects found in these materials will certainly be killed. When freezing anything, you're trying to beat insects from forming natural defenses to freezing. I think your process worked fine. Have you found any live insects? I have had plenty of sucessful freezing episodes with freezer trucks, containers, and warehouses. Tom Parker -----Original Message----- From: dana senge <[email protected]> To: pestlist <[email protected]> Sent: Sat, Mar 10, 2012 8:41 pm Subject: [pestlist] Freezer Trucks This is a message from the Museumpests List. o post to this list send it as an email to [email protected] o unsubscribe please look at the footer of this email. ---------------------------------------------------------- e recently tried using a freezer truck to process a large number of oxes of archives. Record boxes were stacked in rows with 12" gaps etween the rows to allow for air circulation. We placed a datalogger n the center of one of the boxes of archive materials (in the center f the truck) and another outside the boxes to measure the temperature f the air in the truck box. The results were surprising. We had been informed that the truck would go down to -20 degrees F in hours. Our data loggers showed that it took 10 hours for the air in he truck to go from 44 degrees F to -15 degrees F, and the emperature inside one of the record boxes took ~96 hours to drop from 0 degrees to -15 degrees. (The boxes had been in a 72 degree nvironment before being placed in the truck box). It appears that he starting temperature of the boxes of paper was more difficult to educe than I expected. And the truck never achieved the desired emperature. We are very disappointed in these initial results and are trying to igure out if there is a different strategy for using a freezer ruck, or if this is just not feasible for freezing densely packed aterials, such as paper packed in a record box. We are discussing acking boxes half full and packing the truck to allow for even more ir circulation. But it seems that getting to the goal of -20 degrees in 4 hours may not be feasible. Does anyone have any positive experiences working with a freezer truck or processing a large quantity of materials? Especially dense aterials such as wood or boxes of paper? hanks, Dana Senge ssistant Conservator ational Park Service ntermountain Region Museum Services Program ucson, AZ 85745 20-791-6432 [email protected] --------------------------------------------------------------------- o send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in he subject put: unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. o change to the DIGEST mode send an mail to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] or [email protected] ---------------------------------------------------------------------- To send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] or [email protected] The information contained in this message and/or attachments is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any system and destroy any copies. Any views expressed in this message are those of the individual sender. ?? ---------------------------------------------------------------------- To send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] or [email protected] ---------------------------------------------------------------------- To send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] or [email protected] ---------------------------------------------------------------------- To send an email to the list, send your msg to [email protected] To unsubscribe from this list send an email to [email protected] and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to [email protected] with this command in the body: set mode digest pestlist Any problems email [email protected] or [email protected]
