July 16, 2021 4 min read

Protecting our Natural Fibres against the Common Moth

Nobody loves natural fibres more than we do. Cotton, silk, cashmere, mohair and of course wool, we work with them all! We love them because they are less damaging to the environment, they are natural sustainable products, their breathable qualities make them soft and airy against the skin, and their distinctive textures are great for fashions and home décor. 

It is therefore unfortunate that these clothing moths also like natural fibres and we need to find ways to control and eliminate them, preferably in a natural way!!!

Natural fibres such as sheep’s wool, silk, and cashmere and others are rich in keratin – a key structural protein found in our hair and nails, as well as wool, fur, horns, and so on. And unfortunately, whilst natural fibres are very protecting and resilient materials, moth larvae (Tineola Bisselliella) absolutely love it. In nature moths are one of the few ways that wool is broken down – in modern housing, these clothes moths will attack clothes, carpets, furs, blankets, upholstery, piano felts, brush bristles and also of course, our lovely wool blankets and throws. Clearly, it is an unwelcome presence in the fibre enthusiast’s home. 

What we know about Clothing Moths 

Clothing moths are different to other moths in many ways. For example, they are not attracted to light, but prefer to burrow away to cracks in the floors, or in furniture, where they will be undisturbed. The odours from dirty clothes and the keratin oils in natural fibres attract them and, once finding an undisturbed location, they lay their sand-like eggs. Adult moths are not directly harmful to natural fibres; it is the moth larvae that live on the wool and other fibres. After hatching, the larvae consume the wool around them, leaving the characteristic small holes that you find in affected clothing. Larvae develop relatively slowly. Depending on the nature of the location and the conditions, it could be many months for newly hatched larva to mature into adult moths. This is fortunate as if you monitor your natural fibre products regularly (clothing moths consume silk and fur as well), you can eliminate clothing moths before they can reproduce or cause damage. 

The Life Cycle of Common Moths

The lifespan of adult moths is short, between ten and twenty-eight days. The female moths usually lay between forty and one hundred eggs, which generally hatch between three and twenty-one days. Larvae live for approx. thirty-five days or more and will wander some distance away from their food source to pupate in crevices. Taken as a whole, the life cycle is between sixty-five and ninety days at ordinary household temperatures and there are usually two generations of moths per year.

Clothing moths larvae

How to keep them away

Keep all-natural fibres as a clean as possible – washing or soaking in hot water (above 50 degrees Celsius) destroys any eggs or larvae and adult moths are less attracted to clean wool. Spin dry using the spin cycle of your washing machine or blot water out with a towel, then hang or lay flat to dry. If your item is not one that can handle this hot temperatures or water, alternatively, you can freeze them to kill the larvae (place your items in the deep freeze for at least 14 days).

If these options are not possible, vacuum all around the infested area very carefully and in each crack and corner of the furniture concerned. You should ensure that you dispose of your vacuum waste outside, monitor the area closely and repeat vacuuming until the problem is solved.

Do not store natural fibre items in one place for a long time – either wear them, rustle through them, or inspect them regularly. Clothing moths prefer to be undisturbed. If you store your natural fibres for a year in, for example a drawer, you have just created its ideal living environment; dark, undisturbed, surrounded by wool. By regularly going through your natural fibres you can create a less hospitable living environment and, if you happen to have acquired clothing moths, you can catch the problem early and take steps to deal with it.

Store your natural fibres with a cloth sachet containing dried plants for moth prevention. These tend to be plants with strong smells and whilst wit is not known exactly why this works, generations of people have been using plants for natural moth prevention. Rosemary, thyme, mint, lavender, cloves, tansy, pennyroyal, and artemesia are just a few of the plants commonly used and they can be grown easily in most gardens.

Making a natural moth repellent sachet

Making a sachet is easier than you think. All you need is a handkerchief, (or any other square of cloth) for each sachet, some ribbon, and a handful of dried herbs known to repel moths.

These herbs include:

  • Lavender
  • Cedar
  • Rosemary
  • Mint (also good for keeping mice out of the house)
  • Thyme
  • Cinnamon
  • Southernwood
  • Cloves

We do all love our natural fibres, be they wool, cotton, silk, and many others, and not forgetting our Welsh blankets and Tapestry blankets. Let's not let the common clothing moth destroy them!!!

About FelinFach

Our company, FelinFach Natural Textiles is located in the heart of the Preseli area of Pembrokeshire near to Boncath. We design Welsh blankets and the iconic Welsh Tapestry blankets which are traditionally woven at Welsh mills. We also design and make natural hand dyed yarn, cotton, silk and wool scarves and other handmade products. We also offer Welsh tartansSheepskin Rugs, Gift Cards and tools and books for crafters and knitters - Cocoknits, Laine, Amirisu and Making to name a few! Lastly, workshops on hand dyeing with 100% natural dyes in the purpose designed FelinFach Dye Studio. We are a proud supporter of the Campaign for Wool, All Things Wales and Global Welsh.

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Last update 17th July 2021



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