This is a very good question with no correct answer for everyone's situations. 
There are many factors to consider. Pest history, the risk factor of the 
objects (munchablity) building envelope( old loose structure or tight modern 
one) pest history and pest pressure for your region. If traps are coming up 
empty re-evaluate the concentration or placements.  You can always add and take 
away. There are no set practices. I have seen overkill with traps consuming 
labor hours and way too minimal leaving spaces vulnerable. Determine the risk 
is the best place to start. Hope this helps. JTV






Joel Voron   Colonial Williamsburg Foundation

  Conservation Dept.

     Integrated Pest Management

      Office 757-220-7080<tel:757-220-7080>

        Cell 757-634-1175<tel:757-634-1175>

          E-Mail [email protected]<mailto:[email protected]>





[X]

On Oct 31, 2018, at 8:09 PM, "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>> wrote:

Hi Julie,

Would you let me know what you hear? I’m interested in just the same thing.

Tonya

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of 
[email protected]<mailto:[email protected]>
Sent: Thursday, 1 November 2018 10:57 AM
To: Museumpests <[email protected]<mailto:[email protected]>>
Subject: [pestlist] Blunder and Pheromone Trap Ratio/Concentration

Hello, All

Happy Halloween!

Could anyone point me to a good reference to learn about best practices for how 
many traps to lay out in areas of certain sizes, with certain collections, with 
certain histories of pests? In my attempts to unify our IPM system, I'm running 
into areas with tons of traps (60+) and areas with sparse traps. I know the 
mentality of some is an avoidance of pheromone traps, which then means needing 
to 'spam' areas with blunder traps so you know what's there. I would love to 
find some references that can show the best balance of pheromone and blunder 
traps together, and what concentration is optimal.

I looked through muesumpests.net<http://muesumpests.net>, but didn't see 
reference to this in particular. Another article/book/or professional 
experience would be much appreciated.

Cheers!

Julie McInnis
Collections Care Assistant
Fine Arts Museums of San Francisco.
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