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Pests

Started by Traditionalist, October 31, 2011, 09:59:06 AM

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Traditionalist

Quite a few people e-mail me about anti-moth measures, and occasionally about other bugs, and how to get rid of them.

First of all, the main aim is not to get infested in the first place. The most common substances used for this purpose are paradichlorbenzene, and napthalene.Both of these substances only work properly when the containers in which they are placed are more or less airtight. This is necessary for a certain"vapour pressure" to develop. This effectively fumigates materials, and provides an effective deterrent.  There is some contention as to the relative effectiveness of paradichlorbenzene and napthalene, but both do work .Most museums use napthalene to preserve their collections. Putting  these substances loose in drawers, cupboards etc, is only a mild deterrent,and causes an unecessarily strong smell, which may upset other family members, contaminate clothes etc. Constant exposure to the resulting fumes is also not a good idea. I have seen formaldehayde advised as bug killer and deterrent, but I think this is best avoided, as are some other strong poisons.

Both Paradichlorbenzene and Napthalene are toxic, and are suspected carcinogens, so avoid uneccessary handling of them. Anything that kills or deters bugs is bound to be unhealthy, so use some common sense when using such substances. Some woods and herbs, like cedar, sandalwood, lavender, and one or two others, are said to be effective deterrents. Personally I would not rely on this too heavily. In this case, the chemicals mentioned are better.

Most people seem mainly worried about moths, these however, are not the only pests which may attack your fly-dressing materials. Among the most common are Carpet beetles, feather mites, ants, various termites, and there are a whole host of others. It may be of mild academic interest to determine which bugs are presently chomping their way through your expensive and treasured materials, but it really does not matter much in the final analysis.

The substances mentioned, will not kill many of these pests once they have infected your materials, they simply act as a deterrent. Most especially the eggs of some pests are notoriously hard to remove, and killing the adults, or larvae is not a lot of use, as the eggs simply hatch out and you have the whole problem all over again. If you find anything at all crawling about in your materials, then you must immediately assume the worst, and act accordingly, as you will otherwise most likely lose a good proportion, if not all of your materials.

DO NOT DELAY !!!!!! Act immediately.

The most effective way of getting rid of most potential or actual pests is by washing your materials in slightly more than hand hot soapy water, and rinsing very thoroughly. This will also improve many materials with regard to their appearance, and handling qualities.

Unpack all the material, any bags or boxes etc which are infected, should be discarded. Anything which may not be washed and subjected to the following procedure, should be discarded, or at least kept in quarantine, well away from any other materials, for at least three months.  If you can, at least deep-freeze it for a while. If not place it in an airtight polythene bag, or container containing moth crystals ( paradichlorbenzene, or Napthalene ). The bag MUST BE AIRTIGHT, as otherwise the crystals are not able to generate sufficient vapour pressure to fumigate the materials.

This procedure should also be followed when adding materials to your collection. Most especially things like roadkill, but even materials bought from mail order companies, various fly-shops etc, should be very carefully examined, and treated. Do not forget to treat your tying threads, wools, flosses, and dubbing. !!!!! This is often forgotten, and the results can be devastating.

Wooden drawers etc , should be washed out carefully,. and disinfected with spray type bug-killer. there are several "wide spectrum" bug killers on the market. It is of course useless to use fly-spray on carpet beetles, they are immune to it, so make sure you use a substance that actually will kill the pests you are trying to get rid of. Be careful with such substances, they are often highly toxic, and may harm you or your family if used incorrectly.

If you have used such substances on materials, KEEP YOUR FINGERS AWAY FROM YOUR MOUTH WHEN USING SUCH MATERIALS. Even thorough washing will not entirely remove some substances from feathers, fur etc, and the consequences may be dire.

Wash all material in a bath of more than hand hot water with pure soap ( fairy liquid) added. Swish the capes, and fur materials around so that they are properly washed. Rinse off thoroughly with copious amounts of cold water. Spread on clean dry newspaper to dry, be careful if you use illustrated magazines etc for this, as colours from these may run and damage your stuff. If in doubt, place clean paper between your materials and the other papers. Materials should be dried feather, or fur side up.

As an aside, hot water, temperature above 120°F for 20 to 30 minutes, kills all stages of most insects ( 120° F = 48.89°C).

When completely dry, place the stuff in a microwave one small lot at a time, and give it 30 seconds at 600 W. Be careful here, just do one cape or piece of hide at a time, preferably laid on tissue paper over newspaper, feather side up, to absorb any fat etc which may be melted out.

Do not place the materials you have just treated back on the pile of stuff waiting for treatment, place it immediately in clean zip-lock or similar bags, and deep freeze it. Leave it for at least three days, allow it to thaw, and freeze again.

After this you may place the material in either airtight containers with deterrent crystals added, or in zip lock bags with crystals added. MAKE SURE THE BAGS ARE SEALED!!!!! This serves the dual purpose of containing the
smell, and preventing ingress of pests. Of course the bags should be placed in airtight containers as well.

Dubbing materials in open boxes are especially prone to being infested. When these are not in use, they should also be placed in airtight containers with deterrent crystals added. Some dyed materials are not particularly prone to attack by pests, as some of the dye ingredients are also toxic, and the pests die fairly quickly after ingesting such stuff. Nevertheless, it is not a good idea to rely on this, and such materials should be handled, treated and stored just as carefully as any others.

There is an excellent FAQ on this subject here  http://www.uky.edu/~agrdanny/flyfish/petti.htm

Many people may live their whole lives without ever experiencing an attack of pests on their materials. This is no reason to be complacent. If your materials ever are attacked you will be very sorry indeed, especially if these are the result of much time and expense. Some may even be irreplaceable.

I have seen the results of a pest attack on a large box of materials which was sent by post to a friend. When it arrived after three days in transit, the box was full of very healthy looking hairy beetles in a variety of sizes, ( carpet beetles ), and the sad remains of a fairly magnificent selection of expensive capes, consisting mainly of stalks, various bits and pieces, and a lot of beetle shit.

Take the relevant precautions, it is much better to be safe than sorry, even if such precautions are a nuisance.

One last point. Nowadays a fly-dresser´s bench is full of all sorts of chemicals and potions which may be extremely toxic, or otherwise dangerous. Chemicals like Toluene, Acetone, Amyl Acetate, various Ketones, and a host of other stuff, are potentially extremely dangerous, and should be handled with extreme care. Prolonged exposure to some of the fumes may well cause brain damage, and various other extremely unpleasant symptoms. Here again, use some common sense, and if you use any of this stuff, then be careful with it. You have only yourself to blame if something untoward occurs.

Also take extreme care when mixing or thinning such materials. Careless handling or lack of knowledge in the case of some mixtures may have lethal results. IF YOU DO NOT KNOW WHAT WILL HAPPEN WHEN MIXING ONE LIQUID WITH ANOTHER THEN IT IS BEST NOT TO TRY IT. It is also best not to smoke when using such stuff.

It behooves everybody to inform themselves of potential dangers before using such stuff. It is no use complaining afterwards, even assuming that you are in a position to do so.

There are several reasons for this article. A lot of people ask about it, and many are unaware of the problems involved. Most are not aware that vapour pressure is necessary for various crystals to be effective, and the last and most important reason occurred this morning at a friends house.

He had mixed potassium permanganate crystals with a solution of picric acid, and added some glycerine ( Don´t ask me why! I have not the slightest idea, he did mumble something about dyeing some fur before he started, but I was sitting at his bench in his cellar, and more or less ignored him, as I was busy dressing some flies).

To cut a long story short, he was in the process of adding some napthalene crystals to the mixture, when he let out a shout, dropped the glass he was holding, the contents of which immediately burst into flames and began emitting a most noxious smelling gas. Several buckets of water later ( he had no fire extinguisher !!!! ), severely charred linoleum, ( which doubtless added considerably to the smell ), and half choked, we both emerged from the cellar somewhat relieved, and considerably chastised.

If he had dropped this glass anywhere near the paint, thinners, gas bottles, and various other stuff stored in his cellar, I fear the outcome would have been far more serious.

If you feel inclined to carry out experiments of this nature, ( although I would not advise it without at least a basic knowledge of the substances involved and their properties ), then do it outside in the fresh air, and well away from the house.


Traditionalist

#2
Quote from: col on December 23, 2011, 11:58:03 AM
ive found napthalene moth balls on the net , are these useful as a detterant or are the crystals better?

They are about equal in effect.  Both only work properly when used in airtight containers.  Most museums use napthalene to protect their collections. The crystals are paradichlorobenzene.  Both chemicals sublimate, ( turn directly to gas from the solid state). It is the gas which kills the pests. When placed loose in wooden drawers etc  they only work as mild deterrents and the smell is a nuisance.  Both substances are suspected carcinogenics so should be handled with care. Continued exposure to the fumes is also not advisable.

http://en.wikipedia.org/wiki/1,4-Dichlorobenzene

http://en.wikipedia.org/wiki/Napthalene

TL
MC

Traditionalist

Quote from: col on December 23, 2011, 02:13:18 PM
would it be ok in ziplock bags?

Yes. That's mainly how I use it, but I also have a lot of my stuff in large airtight plastic boxes with mothballs in the bottom. ( Napthalene).

TL
MC

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