...So...We freeze the infested wood, rapidly. The insects are fatally unprepared for the rapid temperature drop....Do it again and again.
Thanks so much for that response...
I was much aware of those physiological effects and responses within anthropoids, thank you.
It was refreshing to read words again that don't cross my desk much anymore...Like "harden off" and . I love your post for that reason...!!!...and the fact I have to go back and actually "dust off" text on things like, "cytoplasmic solutes!" Not to many events in my day to day life gets me academically stimulated like your posts...Thanks for that...!!!
Because of your earlier response (and your background being what it is!) I thought it prudent on my part (in the interim of this post) to try and find a citation within current academic research (Google Scholar is really great for this) of my own.
I tried something simple first as: "freezing bug to death"
and thought I would at least find some good "pest control" information...Not so much...to my surprise!!!
This only resulted in the fact that Cimex (Bed bugs) could...with great effort...and multi day events of cycling at -15°C could have some deleterious effects and that to be at all truly effective in samples of upholstery and clothing...a duration of 4 days minimum!!! at those temperatures was required...
I don't believe I can" consider that effective or easy to do?!!?
...and...that is for what most would call a "soft bodied" insect...
My next search attempt: "diapause extirpation of coleoptera "
and "diapause extirpation of coleoptera with thermal cycling "
This only lead to it not being effective and/or how they can resist extremes in temperature cycling
...So again, up to this point, it rather supports what I have contended all along even within the current scientific literature...So I made a phone call, and got similar feed back of..."not effective" and/or "impractical."
I tried several more search attempt with: "cryotherapy for extirpation of coleoptera"
And then!!! "freeze and thaw extirpation for Coleoptera"
within the "Google Scholar" yield some viable result to support your position...!!!
...However the outcome thus far in reading the literature...Not practical...and then I found further that there was a "key list of NOT TO FREEZE
items found in several museum papers and museum group advisories. This was an extensive list, but those germane to this discussion:
Paintings on wood panel.
Joined wooden panels.
Objects with desiccate, failing glues or adhesives.
Like I stated above, the list went on...and there was a notation of wood and/or items that can be effected by thermal cycling...like wood.
The most condensed info I could find on one page, that speaks to you control method is as follows for the "Harry Ransom Center at the University of Texas at Austin:"
How freezing kills insects
The article "The Freezing Process—Effects on Insects and Artifact Materials" in Leather Conservation News, 3(1) Fall 1986, pp. 1–13, written by Mary-Lou E. Florian, is an excellent reference on the treatment of insect-infested materials. Several insect collection pests are profiled in this article. The precise cause of death by freezing is not known. Possible factors include dehydration, osmotic swelling, loss of bound water, changed enzyme reaction rates, ice crystal formation, and the rupture of cell walls. Insects can survive freezing if they are not frozen quickly enough, not frozen at cold enough temperatures, or not thawed slowly enough. Repeated cycles of freezing and thawing can kill even those insects that are resistant to freezing.
The article "A Review of Published Temperatures for the Control of Pest Insects in Museums" in Collection Forum, 8(2), 1992, pp. 41–67, by Tom Strang, gives extremes of hot and cold temperatures that prove lethal for specific types of insects. Even the hardiest insects can be killed by a single exposure to temperatures between 45 to 65 degrees centigrade (113–149 degrees Fahrenheit) over a six-day period or -10 to -40 degrees centigrade (14 to -40 degrees Fahrenheit) over a 25-day period.
A good rule of thumb for most insects is to freeze to the center of the object within four hours at a temperature of -20 degrees centigrade (about -4 degrees Fahrenheit) for at least 72 hours, then to thaw the materials over a 24-hour period.
At this point for me...(jury is still out and I'm going to read more...) is the following:
Thermal cycling within the know and proven modalities is both arduous and often not practical outside laboratory/museum settings. There are proven and harmful effects to some wood joinery items and currently not worth the risk accept under extreme conditions and/or specific cases.
The procedural elements are outline above for other to determine for themselves...
Thanks again Brian for always being stimulating. If I find more, I will post!!!