RE: [pestlist] wood-boring beetle

[Karen Potje]

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We have just an ordinary deep freezer.  It would fit but I don't know if that's 
cold enough.



De : pestlist-ow...@museumpests.net [mailto:pestlist-ow...@museumpests.net] De 
la part de Voron, Joel
Envoyé : 29 juin 2016 13:27
À : pestlist@museumpests.net
Objet : Re: [pestlist] wood-boring beetle

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Do you have a pharma grade freezer? If so would it fit?



Joel Voron

Colonial Williamsburg Foundation

  Conservation Dept.

 Integrated Pest Management

  Office 757-220-7080

Cell 757-634-1175

  E-Mail jvo...@cwf.org








From: pestlist-ow...@museumpests.net 
> on 
behalf of Karen Potje >
Sent: Wednesday, June 29, 2016 11:49 AM
To: pestlist@museumpests.net
Subject: RE: [pestlist] wood-boring beetle

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Thank you to those who've given information on this infestation.

I have just come across this article about Anobium punctatum 
http://www.buildingconservation.com/articles/woodworm/woodworm.htm   which 
states:
Woodworm: Anobium Punctatum - The 
Building
www.buildingconservation.com
A practical guide to woodworm infestation and its eradication by building 
pathologist and environmental scientist Tim Hutton



The deposition of quantities of fresh gritty frass from the emergence holes may 
sometimes indicate active infection. However, frass may often be found coming 
out of emergence holes in previously affected timbers many years after active 
infection has ceased. This may be due to vibration caused by heavy traffic on 
adjacent roads or building works elsewhere on the structure. Again, the 
appearance of freshly deposited frass around emergence holes has often been the 
justification for extensive remedial treatments in the past, even when the 
infection by Anobium punctatum has been dead or inactive for many years.

This makes me wonder if, instead of seeing an active infestation, we are seeing 
frass and dead insects shaken out of the wood during transit from Italy which 
come from a previous, now infactive infestation.  Attached are pictures of the 
frass.  In the picture of the greyish wooden door you see frass at the bottom 
right (In the second photo I've circled areas of frass in yellow) while the 
other photo shows frass deposited on the crate itself.  I have already made 
tentative arrangements to have this crate and its contents treated with CO2 
next week, but given that the treatment is expensive, should I do further 
investigation in an attempt to find out if the infestation is active?  Or 
should I just play it safe and have the treatment done ASAP?  Of course we 
don't want to take any risk of an active infestation continuing and of the 
insects travelling throughout our storage areas. And since these insects have a 
long life cycle, even if the frass is old, how would I know there are not eggs 
inside, waiting to hatch and do more damage?

Here is what the article says about identifying an active infestation:

Searching for live Anobium punctatum larvae within timber is generally 
destructive, and surprisingly few larvae may actually be found. It is possible 
to use highly sensitive piezoelectric microphones embedded in the timbers to 
monitor activity, but this is not yet the basis of an effective diagnostic 
technique for use in the field. Similarly, it is possible to identify recently 
produced frass using immunological or genetic techniques. Again, this is not 
yet the basis of a cost-effective field identification technique.
In practical terms, the likelihood of significant Anobium punctatum infection 
is relatively easy to assess, in that if the deep moisture content of the 
timber is below 12 per cent, it is too dry for infection and decay to occur, 
while if the moisture content is between approximately 16 and 30 per cent it is 
possible, even if infection and decay is not present at the time of 
investigation. If a deep moisture content of 16-30 per cent is found in the 

RE: [pestlist] wood-boring beetle

[Karen Potje]

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Ah - yes, you're right.  The wood is fragile.


De : pestlist-ow...@museumpests.net [mailto:pestlist-ow...@museumpests.net] De 
la part de Voron, Joel
Envoyé : 29 juin 2016 13:31
À : pestlist@museumpests.net
Objet : Re: [pestlist] wood-boring beetle

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Never mind that last comment. The wood could probably not withstand the 
freezing.

Joel Voron

Colonial Williamsburg Foundation

  Conservation Dept.

 Integrated Pest Management

  Office 757-220-7080

Cell 757-634-1175

  E-Mail jvo...@cwf.org








From: pestlist-ow...@museumpests.net 
> on 
behalf of Karen Potje >
Sent: Wednesday, June 29, 2016 11:49:51 AM
To: pestlist@museumpests.net
Subject: RE: [pestlist] wood-boring beetle

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

Thank you to those who've given information on this infestation.

I have just come across this article about Anobium punctatum 
http://www.buildingconservation.com/articles/woodworm/woodworm.htm   which 
states:

The deposition of quantities of fresh gritty frass from the emergence holes may 
sometimes indicate active infection. However, frass may often be found coming 
out of emergence holes in previously affected timbers many years after active 
infection has ceased. This may be due to vibration caused by heavy traffic on 
adjacent roads or building works elsewhere on the structure. Again, the 
appearance of freshly deposited frass around emergence holes has often been the 
justification for extensive remedial treatments in the past, even when the 
infection by Anobium punctatum has been dead or inactive for many years.

This makes me wonder if, instead of seeing an active infestation, we are seeing 
frass and dead insects shaken out of the wood during transit from Italy which 
come from a previous, now infactive infestation.  Attached are pictures of the 
frass.  In the picture of the greyish wooden door you see frass at the bottom 
right (In the second photo I've circled areas of frass in yellow) while the 
other photo shows frass deposited on the crate itself.  I have already made 
tentative arrangements to have this crate and its contents treated with CO2 
next week, but given that the treatment is expensive, should I do further 
investigation in an attempt to find out if the infestation is active?  Or 
should I just play it safe and have the treatment done ASAP?  Of course we 
don't want to take any risk of an active infestation continuing and of the 
insects travelling throughout our storage areas. And since these insects have a 
long life cycle, even if the frass is old, how would I know there are not eggs 
inside, waiting to hatch and do more damage?

Here is what the article says about identifying an active infestation:

Searching for live Anobium punctatum larvae within timber is generally 
destructive, and surprisingly few larvae may actually be found. It is possible 
to use highly sensitive piezoelectric microphones embedded in the timbers to 
monitor activity, but this is not yet the basis of an effective diagnostic 
technique for use in the field. Similarly, it is possible to identify recently 
produced frass using immunological or genetic techniques. Again, this is not 
yet the basis of a cost-effective field identification technique.
In practical terms, the likelihood of significant Anobium punctatum infection 
is relatively easy to assess, in that if the deep moisture content of the 
timber is below 12 per cent, it is too dry for infection and decay to occur, 
while if the moisture content is between approximately 16 and 30 per cent it is 
possible, even if infection and decay is not present at the time of 
investigation. If a deep moisture content of 16-30 per cent is found in the 
sapwood of vulnerable timber, then an assessment has to be made whether this 
moisture content is likely to persist for over two years. If this is the case, 
then appropriate remedial measures should be considered.
I'm inclined to go ahead with the treatment but wonder if those with insect 
expertise would advise further 

Re: [pestlist] wood-boring beetle

[Voron, Joel]

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Never mind that last comment. The wood could probably not withstand the 
freezing.

Joel Voron

Colonial Williamsburg Foundation

  Conservation Dept.

 Integrated Pest Management

  Office 757-220-7080

Cell 757-634-1175

  E-Mail jvo...@cwf.org





From: pestlist-ow...@museumpests.net  on behalf 
of Karen Potje 
Sent: Wednesday, June 29, 2016 11:49:51 AM
To: pestlist@museumpests.net
Subject: RE: [pestlist] wood-boring beetle

This is a message from the Museumpests.net  List.
To post to this list send it as an email to pestlist@museumpests.net
To unsubscribe look at the footer of this email.
---
Thank you to those who’ve given information on this infestation.

I have just come across this article about Anobium punctatum 
http://www.buildingconservation.com/articles/woodworm/woodworm.htm   which 
states:

The deposition of quantities of fresh gritty frass from the emergence holes may 
sometimes indicate active infection. However, frass may often be found coming 
out of emergence holes in previously affected timbers many years after active 
infection has ceased. This may be due to vibration caused by heavy traffic on 
adjacent roads or building works elsewhere on the structure. Again, the 
appearance of freshly deposited frass around emergence holes has often been the 
justification for extensive remedial treatments in the past, even when the 
infection by Anobium punctatum has been dead or inactive for many years.

This makes me wonder if, instead of seeing an active infestation, we are seeing 
frass and dead insects shaken out of the wood during transit from Italy which 
come from a previous, now infactive infestation.  Attached are pictures of the 
frass.  In the picture of the greyish wooden door you see frass at the bottom 
right (In the second photo I’ve circled areas of frass in yellow) while the 
other photo shows frass deposited on the crate itself.  I have already made 
tentative arrangements to have this crate and its contents treated with CO2 
next week, but given that the treatment is expensive, should I do further 
investigation in an attempt to find out if the infestation is active?  Or 
should I just play it safe and have the treatment done ASAP?  Of course we 
don’t want to take any risk of an active infestation continuing and of the 
insects travelling throughout our storage areas. And since these insects have a 
long life cycle, even if the frass is old, how would I know there are not eggs 
inside, waiting to hatch and do more damage?

Here is what the article says about identifying an active infestation:

Searching for live Anobium punctatum larvae within timber is generally 
destructive, and surprisingly few larvae may actually be found. It is possible 
to use highly sensitive piezoelectric microphones embedded in the timbers to 
monitor activity, but this is not yet the basis of an effective diagnostic 
technique for use in the field. Similarly, it is possible to identify recently 
produced frass using immunological or genetic techniques. Again, this is not 
yet the basis of a cost-effective field identification technique.
In practical terms, the likelihood of significant Anobium punctatum infection 
is relatively easy to assess, in that if the deep moisture content of the 
timber is below 12 per cent, it is too dry for infection and decay to occur, 
while if the moisture content is between approximately 16 and 30 per cent it is 
possible, even if infection and decay is not present at the time of 
investigation. If a deep moisture content of 16-30 per cent is found in the 
sapwood of vulnerable timber, then an assessment has to be made whether this 
moisture content is likely to persist for over two years. If this is the case, 
then appropriate remedial measures should be considered.
I’m inclined to go ahead with the treatment but wonder if those with insect 
expertise would advise further investigation first.
Thanks for your advice

Karen Potje
Chef, Conservation/Restauration
Head, Conservation/Preservation
Centre Canadien d’Architecture
1920, rue Baile, Montréal, Québec
Canada H3H 2S6

514 939 7001 x 1236

www.cca.qc.ca




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To unsubscribe from this list send an email to
imail...@museumpests.net and in the body put:
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Any problems email l...@zaks.com




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Re: [pestlist] wood-boring beetle

[Voron, Joel]

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Do you have a pharma grade freezer? If so would it fit?


Joel Voron

Colonial Williamsburg Foundation

  Conservation Dept.

 Integrated Pest Management

  Office 757-220-7080

Cell 757-634-1175

  E-Mail jvo...@cwf.org






From: pestlist-ow...@museumpests.net  on behalf 
of Karen Potje 
Sent: Wednesday, June 29, 2016 11:49 AM
To: pestlist@museumpests.net
Subject: RE: [pestlist] wood-boring beetle

This is a message from the Museumpests.net  List.
To post to this list send it as an email to pestlist@museumpests.net
To unsubscribe look at the footer of this email.
---
Thank you to those who’ve given information on this infestation.

I have just come across this article about Anobium punctatum 
http://www.buildingconservation.com/articles/woodworm/woodworm.htm   which 
states:

Woodworm: Anobium Punctatum – The 
Building
www.buildingconservation.com
A practical guide to woodworm infestation and its eradication by building 
pathologist and environmental scientist Tim Hutton



The deposition of quantities of fresh gritty frass from the emergence holes may 
sometimes indicate active infection. However, frass may often be found coming 
out of emergence holes in previously affected timbers many years after active 
infection has ceased. This may be due to vibration caused by heavy traffic on 
adjacent roads or building works elsewhere on the structure. Again, the 
appearance of freshly deposited frass around emergence holes has often been the 
justification for extensive remedial treatments in the past, even when the 
infection by Anobium punctatum has been dead or inactive for many years.

This makes me wonder if, instead of seeing an active infestation, we are seeing 
frass and dead insects shaken out of the wood during transit from Italy which 
come from a previous, now infactive infestation.  Attached are pictures of the 
frass.  In the picture of the greyish wooden door you see frass at the bottom 
right (In the second photo I’ve circled areas of frass in yellow) while the 
other photo shows frass deposited on the crate itself.  I have already made 
tentative arrangements to have this crate and its contents treated with CO2 
next week, but given that the treatment is expensive, should I do further 
investigation in an attempt to find out if the infestation is active?  Or 
should I just play it safe and have the treatment done ASAP?  Of course we 
don’t want to take any risk of an active infestation continuing and of the 
insects travelling throughout our storage areas. And since these insects have a 
long life cycle, even if the frass is old, how would I know there are not eggs 
inside, waiting to hatch and do more damage?

Here is what the article says about identifying an active infestation:

Searching for live Anobium punctatum larvae within timber is generally 
destructive, and surprisingly few larvae may actually be found. It is possible 
to use highly sensitive piezoelectric microphones embedded in the timbers to 
monitor activity, but this is not yet the basis of an effective diagnostic 
technique for use in the field. Similarly, it is possible to identify recently 
produced frass using immunological or genetic techniques. Again, this is not 
yet the basis of a cost-effective field identification technique.
In practical terms, the likelihood of significant Anobium punctatum infection 
is relatively easy to assess, in that if the deep moisture content of the 
timber is below 12 per cent, it is too dry for infection and decay to occur, 
while if the moisture content is between approximately 16 and 30 per cent it is 
possible, even if infection and decay is not present at the time of 
investigation. If a deep moisture content of 16-30 per cent is found in the 
sapwood of vulnerable timber, then an assessment has to be made whether this 
moisture content is likely to persist for over two years. If this is the case, 
then appropriate remedial measures should be considered.
I’m inclined to go ahead with the treatment but wonder if those with insect 
expertise would advise further investigation first.
Thanks for your advice

Karen Potje
Chef, Conservation/Restauration
Head, Conservation/Preservation
Centre Canadien d’Architecture
1920, rue Baile, Montréal, Québec
Canada H3H 2S6

514 939 7001 x 1236

www.cca.qc.ca




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Re: [pestlist] Frass identification

[Bethan Bryan]

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Hi Tony, 
Thank you! That's great.
Best,
Bethan 

> On 27 Jun 2016, at 14:39, Tony Irwin  wrote:
> 
> This is a message from the Museumpests.net  List.
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> ---
> Looks like Brown House Moth - Hofmannophila pseudospretella.
> Tony
> 
> Dr A.G.Irwin
> 47 The Avenues
> Norwich
> Norfolk NR2 3PH
> England
> 
> mobile: +44(0)7880707834
> phone: +44(0)1603 453524
> 
>> On 27 June 2016 at 09:24, BRYAN B.N.  wrote:
>> 
>> This is a message from the Museumpests.net  List.
>> To post to this list send it as an email to pestlist@museumpests.net
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>> ---
>> 
>> 
>> 
>> Hi all,
>> 
>> This may be a long shot, but would anyone be able to help identify what 
>> insect may have produced this frass? Whatever it is, it has eaten leather 
>> and cork, but ignored paper. The cork may have been attractive due to 
>> impregnation with some sort of varnish.
>> 
>> Many thanks,
>> Bethan
>> 
>> 
>> 
>> -
>> To unsubscribe from this list send an email to
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>> Any problems email l...@zaks.com
> 
> -
> To unsubscribe from this list send an email to
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> 
> 
>  


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