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  • 1.  Webbing clothes moth infestation in collections storage

    Posted 04-12-2024 12:36

    Hello everyone,

    Seeking advice for a difficult situation. We have a webbing clothes moth infestation in our collections storage building. We have placed sticky traps in every room and have found an area with the highest concentration (the library, which we can't seem to figure out). The original source was a box of raw wool in the basement that was disposed of a year ago, and then the basement was bombed, so they seem to have moved upstairs. The building is a large, c.1908 schoolhouse and full of cracks for insects to get around. We have now caught moths in almost every room (1-3 in each over the course of a week) despite doors being kept closed. The building houses both our costume collection and thousands of objects, some boxed and some uncovered on open shelves (we're a historical society collecting for almost a hundred years, so literally any material you can think of – wool, cotton, silk, wood, metal, rubber, plastic, paint, stone, ceramic…). We are in a year with budget restrictions (even more so than usual) so the idea of trying to rent a freezer trailer and potentially hire outside contractors to remove and freeze every object is untenable, we also don't have a good way to keep the treated objects away from the untreated objects (i.e. no extra space to store things during the process). It seems we are faced with either an inevitable massive infestation of moths in our entire costume and decorative arts collection a year or two down the line, or potentially using fumigant bombs multiple times throughout every room in the building (the current directive we have been given is to do a regimen of no less than 5 bombings over the course of a year, in every room from roof to basement, including costume storage, collections storage, the archives, and the library).

     

    The moths will potentially destroy wool, etc., but the fumigants will potentially affect everything else. Since using fumigants goes against best practice, we can't find anything that references fumigating an entire building of collections, and because of that we can't find much about mitigating potential damage or protecting the health of ourselves and future staff. But we are at a loss with what else to do, and know we can't be the only ones who have experienced this set of circumstances. 

    Any realistic advice or experience would be greatly appreciated.



    ------------------------------
    Colyn C. Hunt | Collections Care Officer
    she/her/hers
    Historic Richmond Town 
    Traditional land and ancestral home of the Munsee Lenape people
    441 Clarke Ave | Staten Island, NY 10306
    (718) 351 - 1611 Ext. 271
    chunt@historicrichmondtown.org
    ------------------------------


  • 2.  RE: Webbing clothes moth infestation in collections storage

    Posted 04-13-2024 14:38
    In a similar situation, I have begun experimenting with diatomaceous earth. It is inexpensive and dries out the critters who eat it and or crawl in it. I know dust is bad for the artifacts but not as bad as being eaten. Of course, masks must be worn to protect human lungs during application and periodic vacuuming. Did a lot of online research but did not consult an objects conservator. I am dealing with carriages with wool upholstery, not costumes, and am applying directly. However, I may consider putting in building corners of collections room where our costumes are stored. Any thoughts on using diatomaceous earth in these ways?





  • 3.  RE: Webbing clothes moth infestation in collections storage

    Posted 04-15-2024 10:27
    As you probably know, you have a big problem.   While the moths are the most visible part, the real "buggers" are the eggs and larvae.    I'm not sure who you are consulting, but my guess is that the suggestion that you bomb on a regular basis is because that method only gets the moths and larvae that are currently alive and does nothing about the eggs.

    The bad news is that you need professional help, and by that I mean you need someone who has experience with infestations in a museum setting.   They will help you set up a plan that will deal with the whole mess, including examination of the collections and a very (very!) thorough cleaning of every part of the storage space to get rid of larvae and eggs.

    You might want to contact the folks at the Northeast Document Conservation Center directly and talk to them about recommendations and cost.

    Funding is available, so you should start looking at appropriate grants.  Preservation Assistance Grants for Smaller Institutions from NEH would be perfect; unfortunately the next deadline is January 2025.   Sustaining Cultural Heritage (deadline October 2024) might also work if you can get someone to do an assessment before then. 

    In the meantime, I would suggest you start the process of examining susceptible items, freezing or vacuuming where appropriate, and then putting each examined or treated item in a fully enclosed (i.e., sealed with tape) poly (plastic) bag (using rolls or tubing for the big stuff).   For the most part insects will chew their way out of poly, but rarely chew through poly to get to an object.

    I dealt with a similar problem (that ultimately involved the removal of three floors of carpeting and weeks of examination, cleaning and rehousing) but we did come out the other end moth-free.



    --
    Janice Klein
    Executive Director
    Museum Association of Arizona





  • 4.  RE: Webbing clothes moth infestation in collections storage

    Posted 04-13-2024 14:38

    Hi Colyn, As the acting C2C Care community monitor, I'd like to thank you for posting this to our community. Based on my limited experience, you are probably looking at a very long-term process to get this under control; they are pernicious! Several resources you might check out are: Museum Pests https://museumpests.net/  and posting to their group list serve.
    Searching https://connectingtocollections.org/ under Integrated Pest Management brings up several listings. There are also several Conserveogram articles related to pest management: https://www.nps.gov/museum/publications/conserveogram/cons_toc.html#collectionpreservation. I'm sure there are many with direct experience in dealing with these pests who will hare their experiences. 




    ------------------------------
    Karen Jones
    Book and Paper Conservator
    Freelance/Private Practice/Self-employed/Independent
    Denver CO
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  • 5.  RE: Webbing clothes moth infestation in collections storage

    Posted 04-15-2024 10:27

    Hi Colyn,

    Karen gave you a few good resources for pest issues in general. As co-chair of the MuseumPests Working Group, which manages the museumpests.net website and associated PestList, you are describing a difficult situation but not one that is inevitable. But is also one that requires more detail and nuance than possible in a generic post. I have helped Carli with a prior wood boring infestation issue at your site a few years ago and I would be happy to talk about steps you can take to tackle this infestation. If you'd like to discuss your issues in more detail, please email me to set up a time to talk.

    Dana,

    Diatomaceous earth is a useful tool when applied properly. Putting it into corners of rooms is not a good way to deploy it and it should not be used directly on collection items. I can recommend a few ideas that would be useful for your large oversize objects.  I would be happy to discuss further with you as well.

    Best,

    Rachael 



    ------------------------------
    Rachael Arenstein
    A.M. Art Conservation, LLC
    rachael@amartconservation.com
    ------------------------------



  • 6.  RE: Webbing clothes moth infestation in collections storage

    Posted 04-20-2024 10:45

    Keep LIGHTS ON 24 hrs a day in the main hallways, loading dock, etc will help. The adult moths will fly to the lights. At our museum we kept our lights on for a good 6 months. But not where sensitive collections are being stored in the open.  Good luck! Lots of people hours!



    ------------------------------
    Tanya So
    Owner
    Chambersburg PA
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  • 7.  RE: Webbing clothes moth infestation in collections storage

    Posted 04-22-2024 10:10

    Hello All,

     

    My apologies Ms. So, but webbing clothes moths are actually repelled by light. It is one of the ways you can tell if you have an infestation. When you walk into a dark room and turn on the lights, you can see them scatter, looking for hiding places. Keeping the lights on outside storage will actually drive them further into all the dark places in your textiles.

     

    There is a lot of good information online about these moths and how to deal with them.

     

    https://www.english-heritage.org.uk/learn/conservation/clothes-moth-research/understanding-clothes-moths/

     

    https://preservation.library.harvard.edu/blog/ounce-do-flight-thing-how-combat-webbing-clothes-moths-collections

     

    https://putthison.com/a-museum-textile-conservator-explains-how-to-deal-with-clothes-moths/

     

    That being said, you do have a more difficult situation than most. I would recommend contacting AIC to find an expert in your area to get advice from a qualified person who has dealt with this type of situation before. You can reach them at 202-452-9542 or on their website https://www.culturalheritage.org/about-us/contact or find your own professional here: https://www.culturalheritage.org/about-conservation/find-a-conservator.

     

    Good luck Ms. Hunt!

     

    Kate

     

     

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    Katherine Ridgway

    State Archaeological Conservator

    Department of Historic Resources

     

    Email  katherine.ridgway@dhr.virginia.gov

    Phone  804-482-6442

    Title: line art

     

    2801 Kensington Ave, Richmond, VA 23221

    www.dhr.virginia.gov