One either freezes them or places them in a oxygen evacuation chamber. 

Contact a conservator through the AIC for professional assistance. 
http://aic.stanford.edu/

Good luck
Diane G. 


On Thu, 1 Dec 2005 14:22:21 -0600, Dirk Van Tuerenhout <[log in to unmask]> 
wrote:

>We are currently working on a touch cart that would serve our Hall of
>the Americas. One of the areas we cover in this hall is the Southeast
>and the design of this touch cart would include a 4 foot replica of a
>Caddo "beehive style" house. For this we are considering using tree
>saplings to be bent into the right shape.
>
>My question is: how does one treat the wood to prevent any insect
>infestation?  I would prefer to stay away from using chemicals for
>obvious reasons. Any thoughts?
>
>Many thanks and best wishes,
>
>Dirk Van Tuerenhout
>Houston Museum of Natural Science
>
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