Re: [pestlist] Insect casings

[Alex Roach]

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Hi Whitney

They look like spider egg cases.

Best wishes
Alex

Alex Roach
Heritage Pest Management

On 30/03/2012, at 7:55 AM, "Whitney  Robertson" 
 wrote:

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> Hi all,
> 
> 
> Attached are images of insect casings/spiderwebs found on the outside of a 
> Japanese screen that is painted leather encased (firmly) in glass, with wood 
> surrounds. There doesn’t seem to be any current activity, and the pieces had 
> stayed in one place for a long time. Any idea of what sort of insect may have 
> made these casings? Thanks!
> 
> 
> Whitney
> 
>  
> 
> Whitney A. J. Robertson
> 
> Museum Collections Manager
> 
> The Society of the Cincinnati
> 
>  
> 
> Anderson House
> 
> 2118 Massachusetts Avenue NW
> 
> Washington, DC 20008
> 
> T 202.785.2040 x429
> 
> F 202.785.0729
> 
> wrobert...@societyofthecincinnati.org
> 
> www.societyofthecincinnati.org
> 
>  
> 
> 
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Re: [pestlist] Insect casings

[bugman22]

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Whitney -

They are spider egg cases.

Tom Parker



-Original Message-
From: Whitney Robertson 
To: pestlist 
Sent: Thu, Mar 29, 2012 5:13 pm
Subject: [pestlist] Insect casings


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Hi all,

Attached are images of insect casings/spiderwebs found on the outside of a 
Japanese screen that is painted leather encased (firmly) in glass, with wood 
surrounds. There doesn’t seem to be any current activity, and the pieces had 
stayed in one place for a long time. Any idea of what sort of insect may have 
made these casings? Thanks!

Whitney 
 
Whitney A. J. Robertson
Museum Collections Manager
The Society of the Cincinnati
 
Anderson House
2118 Massachusetts Avenue NW
Washington, DC 20008
T 202.785.2040 x429
F 202.785.0729
wrobert...@societyofthecincinnati.org
www.societyofthecincinnati.org
 

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Re: [pestlist] question about extent of application of Bora-Care

[bugman22]

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Kathleen -

Thank you for the update.

The reason one uses BoraCare instead of Tim-bor is it leaves twice as much 
sodium octaborate in the wood.

Do not treat any collection artifact with any borate or other topical material. 
 You will chemically alter the artifact for the remainder of its lifetime.

Hydrogen phosphide gas reacts with all sorts of metals.  It should not be used 
on museum artifacts.

I really cannot help you further because I have not had an opportunity to see 
your situation.  It's like asking the "doctor" to diagnose and prescribe 
without seeing the patient.

Hope things work out well for your building and collection.

Sincerely,

Tom Parker



-Original Message-
From: Mullen, Kathleen D - WHS 
To: pestlist 
Sent: Thu, Mar 29, 2012 3:06 pm
Subject: RE: [pestlist] question about extent of application of Bora-Care


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To follow up:
 
We’ve had good help here from a University entomologist and some preservation 
architects, and have a contact at Forest Products lab, also, should we find 
need for it. We’ve determined at this point that the infestation is quite old, 
and very widespread, and that the affected woods are softwood, and therefore 
not infested with ‘true’ powder post beetles. 
 
A large portion of the building structure needs to be treated, and our pest 
control vendor is adamant that the entire surface of certain (not quite all) 
walls and all infested beams must be treated. I adamantly trust based on our 
interactions with him that he is making a practical choice based on his 
experience, and thus we are prepared to treat the structure to the extent he 
advises. Because of the vast amount of material stored within the structure, we 
also feel it is sensible to treat certain areas preventatively, in case 
something should be missed. Because it is such a large area, we are using 
Tim-Bor, rather than BoraCare, for the lower expense and greater ease of 
application. And it is Tim-Bor, as our vendor has a stock of it, regardless of 
it’s current commercial availability. 
 
As for the proposed fumigation treatment – the vendor thought all objects in 
the building would be treated, which is why he initially proposed fumigation as 
most economical. However, most non-collections items will eventually be 
discarded, and since the proposed fumigant is phosphine gas (which I am not 
comfortable treating collections with, and see from prior messages has not 
always been effective) we are investigating other options. While we may 
consider anoxic treatments, our best at the moment seems to be treating 
affected collections with an application of BoraCare. 
 
The question now in our minds is, do we treat these collections and leave them 
in situ for two years? One to allow the pests to eat their way through the 
treatment, and another to see if the treatment was successful and no more exit 
holes appear?  Ideally, when the infestation is gone, we would like to see 
collections moved to a better storage environment – which is available, 
however, we are fearful of spreading the infestation through our own mitigation 
efforts! 
 
 
Cheers,
Katie
Preservation Coordinator,
Wisconsin Historical Society
 
 
From: ad...@museumpests.net [mailto:ad...@museumpests.net] On Behalf Of 
bugma...@aol.com
Sent: Friday, February 10, 2012 8:03 PM
To: pestlist@museumpests.net
Subject: Re: [pestlist] question about extent of application of Bora-Care
 
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Group -

 

Studies have shown a timber damaged by either powder post beetles or Old House 
Borers loses only 15% of its structural strength.  The reason is the galleries 
are tightly packed with powdered frass.  The larvae are not removing the wood, 
as do termites.

 

Tom Parker



-Original Message-
From: Alex Roach 
To: pestlist 
Sent: Fri, Feb 10, 2012 5:59 pm
Subject: Re: [pestlist] question about extent of application of Bora-Care

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Hi

 

I would apply the spray to susceptible timber throughout the area where the 
borer was active, mainly because their long life cycle within the timber (i.e. 
from when the larvae first emerge from t

RE: [pestlist] question about extent of application of Bora-Care

[Mullen, Kathleen D - WHS]

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To follow up:

We’ve had good help here from a University entomologist and some preservation 
architects, and have a contact at Forest Products lab, also, should we find 
need for it. We’ve determined at this point that the infestation is quite old, 
and very widespread, and that the affected woods are softwood, and therefore 
not infested with ‘true’ powder post beetles.

A large portion of the building structure needs to be treated, and our pest 
control vendor is adamant that the entire surface of certain (not quite all) 
walls and all infested beams must be treated. I adamantly trust based on our 
interactions with him that he is making a practical choice based on his 
experience, and thus we are prepared to treat the structure to the extent he 
advises. Because of the vast amount of material stored within the structure, we 
also feel it is sensible to treat certain areas preventatively, in case 
something should be missed. Because it is such a large area, we are using 
Tim-Bor, rather than BoraCare, for the lower expense and greater ease of 
application. And it is Tim-Bor, as our vendor has a stock of it, regardless of 
it’s current commercial availability.

As for the proposed fumigation treatment – the vendor thought all objects in 
the building would be treated, which is why he initially proposed fumigation as 
most economical. However, most non-collections items will eventually be 
discarded, and since the proposed fumigant is phosphine gas (which I am not 
comfortable treating collections with, and see from prior messages has not 
always been effective) we are investigating other options. While we may 
consider anoxic treatments, our best at the moment seems to be treating 
affected collections with an application of BoraCare.

The question now in our minds is, do we treat these collections and leave them 
in situ for two years? One to allow the pests to eat their way through the 
treatment, and another to see if the treatment was successful and no more exit 
holes appear?  Ideally, when the infestation is gone, we would like to see 
collections moved to a better storage environment – which is available, 
however, we are fearful of spreading the infestation through our own mitigation 
efforts!


Cheers,
Katie
Preservation Coordinator,
Wisconsin Historical Society


From: ad...@museumpests.net [mailto:ad...@museumpests.net] On Behalf Of 
bugma...@aol.com
Sent: Friday, February 10, 2012 8:03 PM
To: pestlist@museumpests.net
Subject: Re: [pestlist] question about extent of application of Bora-Care

This is a message from the Museumpests List.
To post to this list send it as an email to 
pestlist@museumpests.net
To unsubscribe please look at the footer of this email.
---
Group -

Studies have shown a timber damaged by either powder post beetles or Old House 
Borers loses only 15% of its structural strength.  The reason is the galleries 
are tightly packed with powdered frass.  The larvae are not removing the wood, 
as do termites.

Tom Parker

-Original Message-
From: Alex Roach 
mailto:alro...@heritagepestmanagement.com>>
To: pestlist mailto:pestlist@museumpests.net>>
Sent: Fri, Feb 10, 2012 5:59 pm
Subject: Re: [pestlist] question about extent of application of Bora-Care
This is a message from the Museumpests List.
To post to this list send it as an email to 
pestlist@museumpests.net
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Hi

I would apply the spray to susceptible timber throughout the area where the 
borer was active, mainly because their long life cycle within the timber (i.e. 
from when the larvae first emerge from the egg until when the adult emerges 
from an exit hole) means that extensive damage can occur. Sound timber now may 
not be in 3-4 years time.

Best wishes,
Alex

Alex Roach
Heritage Pest Management

On 10/02/2012, at 8:37 AM, "Rick Kerschner" 
mailto:rkersch...@shelburnemuseum.org>> wrote:
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Is the infestation widespread, i.e. frass-filled exit holes throughout the 
structure? We have been quite successful in controlling powder post beetles by 
applying Bora-Care only to the infested areas as identified by holes with frass 
in them and trails of frass extending from the holes, areas such as the sill of 
the building or the base of columns where the wood has a higher moisture 
content and is more in

Re: [pestlist] Anoxic treatment (on behalf of Stephan Schafer)

[Cindy_Norum]

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Return Receipt
   
   Your   Re: [pestlist] Anoxic treatment (on behalf of Stephan
   document:  Schafer) 
   
   wascindy_no...@nps.gov  
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   by: 
   
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Re: [pestlist] Anoxic treatment (on behalf of Stephan Schafer)

[colin smith]

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Dear J.S OH,

I agree with most of what Stephan says, however there are a few points which 
I should like to comment on;

  1.. There is a limited choice of inert gases, I also never saw the point 
in using Argon. In some parts of the world you may still use nitrogen from 
cylinders or generate it. Sadly this is no longer the case in the EU as 
nitrogen and carbon dioxide are now a registered pesticides and you have to 
have a special licence to use them. Scavengers are currently exempt.
  2.. Flexible bubbles always work at ambient pressure, ridged chambers do 
not. This can cause problems.
  3.. There are some complex and expensive systems for control, most are not 
required.
  4.. You will have to humidify a dry gas. Anoxia using scavengers avoids 
this.

Please visit our website for more detailed information.

Best wishes

Colin Smith

  http://www.csconserv.co.uk/  &  http://conserv.biz/


ZerO2 systems

From: l...@zaks.com
Sent: Thursday, March 29, 2012 1:55 PM
To: pestlist@museumpests.net
Subject: FW: [pestlist] Anoxic treatment (on behalf of Stephan Schafer)
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Dear J.S. OH,

There are certainly many with experience in anoxic treatments but there are 
not as many “off the shelve” solutions, especially when it comes to larger 
volumes. Therefore, it would be important to know, what the volume (e.g. in 
m3) of your bubble or chamber should be as this is certainly one of the 
determining factors. However, when considering frequent anoxia treatments 
there are in my opinion three or four main questions:



1.   what source of inert gas to use

2.   what type of chamber or bubble (rigid or bubble)

3.   what equipment to use to control the process

4.   how to humidify or dehumidify



1.   The gas can obviously be acquired in tanks but you certainly may 
want to consider using a nitrogen generator. There are no major advantages 
in using argon when the objective is to kill pests! There are nowadays 
nearly maintenance and oil free PSA (pressure swing adsorption) based N2 
generators that will produce purity levels up to 99,99%

2.   Rigid chambers can be built of sheet metal etc. or you can of 
course produce flexible bubbles with barrier plastic sheets.

3.   There are anoxia control units that will constantly data log and 
control the O2 concentration, humidity and temperature and if you wish even 
pressure. You should look for something that is easy to use. I had a piece 
of equipment custom made, with a cellular modem installed that will send 
protocols of the conditions inside the bubble via SMS to my cell phone. This 
is a very practical feature of you are not constantly near the treatment 
site.

4.   There are several ways to humidify the gas that will always be 
completely dry coming from a tank or generator. So in nearly all cases, you 
will have to humidify the gas according to the needs and prior climatic 
conditions of the objects. This can be done by splitting the main gas stream 
into a dry and wet stream or by actually placing a humidifier system inside 
the bubble that is turned on and off by the control unit. You also may have 
to dehumidify and of course it is possible to do this as well but in many 
cases the “dry” gas stream is sufficient for that purpose.



I hope these comments are of any help and if you need further assistance don’t 
hesitate to contact me off the list.



Dipl. Rest. Stephan Schäfer





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STEPHAN SCHÄFER CONSERVAÇÃO E RESTAURAÇÃO LTDA.

CONSERVATION AND RESTORATION OF ART AND CULTURAL HERITAGE

PREVENTIVE CONSERVATION AND NON TOXIC PEST CONTROL IN MUSEUMS,

LIBRARIES, ARCHIVES AND COLLECTIONS



Rua Comendador Elias Zarzur, 2330 - Alto da Boa Vista
04736-003 Sao Paulo, SP
Tel./Fax: 00 xx 11 3816-0489
Cel: 00 xx 11 8366-0230
e-mail: step...@stephan-schafer.com

Skype: stephan.schaefer5

www.stephan-schafer.com
www.artprotect.com.br

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Dear all



I am J.S. OH of The National Folk Museu of Korea and reponsible for IPM of 
The National Folk Museum of Korea.

Now I am investigating the anoxic treatment  of museums around the world.

Does anyone have any information of anoxic treatment(nitrogen