Long before synthetic pesticides and the “famous” DEET existed, people across every corner of the globe developed remarkably effective systems for keeping insects away from their bodies, food supplies, and sleeping spaces.

These methods were passed down through generations not just as cultural traditions but as genuine survival strategies, refined over centuries of close observation of the natural world. The fact that they spread independently across civilizations that had no contact with each other says something important: the plants, smoke, oils, and physical barriers they relied on actually worked.

What makes this history especially relevant today is that most of these approaches still work. For people who prefer to minimize chemical exposure in their homes, what people did before chemicals existed opens up a new approach to seeing things, the “old ways”.

To be totally honest, I decided to write this article because, a while ago I had to deal with a bedbug infestation at my cabin and I was curious to find out how our ancestors dealt with such annoyance. So, this article will showcase my research and I hope it helps people out there.

The Ancient Tradition of Using Smoke to Repel Insects

Smoke is probably the oldest insect-control method in human history. Early communities noticed that sitting near a fire kept bugs away, and over time they refined which plants produced the most effective smoke.

For example, in sub-Saharan Africa and across South Asia, communities burned combinations of neem, eucalyptus, and aromatic herbs in sleeping quarters each evening. Research published in the journal Heliyon confirmed that burning mixed powders of Azadirachta indica, Eucalyptus camaldulensis, and Ocimum forsskolin reduced mosquito density in experimental huts by over 90% (which to mee, that sounds amazing).

Bundles of dry artemisia, sage, or cedar were burned to fumigate sleeping areas before bedding was laid out. Today, the same principle lives on in citronella candles and incense sticks. In fact, few people know that during WWII French hospitals used to burn sage and rosemary to get rid of insects and purify the air.

Herbs That Don’t Matter What Season, They Work Year-Round

Dried and fresh herbs served as the pantry protector and pest repellent of the pre-industrial world. Lavender was used extensively across Europe, tucked into linen closets and sewn into pillowcases. In India, dried neem leaves were placed in grain storage jars and between stored fabric. Patchouli traveled the Silk Road inside silk shawls to protect them during transport.

What these herbs share is a high content of volatile terpenes and phenols, the same compounds modern research identifies as the active agents in plant-based repellents. A review published in the NIH’s PMC database confirmed that lemongrass, citronella, cedar, peppermint, lavender, and geranium oils are among the most reliably effective plant-based options available. Rosemary, thyme, and mint were also scattered around food storage areas and near doorways throughout Mediterranean households well into the twentieth century.

How Oil-Based Repellents Were Applied to the Body

Plant-based oils applied to skin have a documented history across nearly every major civilization. In ancient Egypt, lemon balm was combined with animal fats to keep mosquitoes and flies away. Roman soldiers rubbed themselves with olive oil infused with aromatic herbs before campaigns in mosquito-heavy regions, with pennyroyal being one of the documented additions.

Indigenous communities in North America used bear grease infused with sage or cedar bark, and across Africa, shea butter mixed with aromatic plant extracts served as both skin protection and insect deterrent.

Compounds like linalool in lavender and eucalyptol in eucalyptus directly stimulate odorant receptors in a mosquito’s antennae, masking the skin-based chemical signals that attract biting insects. In fact, lemon eucalyptus has been in continuous use since the 1940s and remains one of the few plant-based options the CDC formally endorses. I take this repellent with me during my long camping trips and it really works.

Physical Barriers: The Mosquito Net’s 4,000-Year History

The physical barrier is the most universally adopted insect-control method in history. The word “canopy” derives from the Greek konopeion, meaning a couch with a mosquito curtain.

Mosquito nets, documented use traces back to ancient Egypt, where pharaohs slept beneath nets woven from fine flax along the Nile. Herodotus described Egyptian fishermen who used their fishing nets during the day and slept beneath them at night as insect protection.

In China, Japan, and India, silk and cotton nets served similar functions and were associated with wealth because finer weave meant better protection. Victorian explorers credited bed nets as their single most important piece of equipment in tropical regions, and Dr. David Livingstone reportedly said the inventor of mosquito screens deserved a statue in Westminster Abbey.

To this day, the design has not changed fundamentally since ancient Egypt: fine mesh, properly sealed at the edges, suspended above a sleeping surface.

Protecting Food Storage from Insects Without Chemicals

Food spoilage from insect infestation was an existential problem throughout most of human history. Grain weevils, flour beetles, pantry moths, and fly larvae could destroy an entire winter’s food supply if nothing was done to prevent access.

Clay pots sealed with beeswax or pine resin were used in ancient Egypt, Greece, and Rome to store grain and dried goods. In medieval Europe, dried bay leaves were layered between grain in storage, a practice still recommended today. It works because the leaves contains chemicals that interfere with insect nervous systems, and the tradition of adding bay leaves to flour containers persists in many Mediterranean households.

Cedar was another critical storage material used to protect wool and textiles, with cedar-lined chests documented across the Near East and ancient Egypt.

Cedar, Lavender, and Cloves: Protecting Textiles from Insects

Protecting fabric from moths, carpet beetles, and silverfish was a serious concern in any household that relied on wool or silk. Lavender sachets in linen closets date back at least to ancient Greece and Rome. European households scattered fresh lavender on floors, embedded it in mattress stuffing, and sewed it into small bags to place between stored fabric. Cloves were another major textile protector from Southeast Asia through Europe.

Pomanders, balls of dried citrus studded with cloves, were hung in wardrobes from the Renaissance onward. Clove oil contains eugenol, a powerful insecticide that repels and can kill insects on contact.

How Bedding Was Treated to Discourage Insects

Beyond the mosquito net, historic bed preparation involved several layers of defense. Straw mattresses were regularly treated with insect-repellent materials because they were prime habitat for lice, mites, fleas, and bedbugs.

Dried lavender, pennyroyal, and wormwood were mixed into mattress stuffing across European households. Pennyroyal in particular was known for its strong effect on fleas and appeared in household management guides from the medieval period through the eighteenth century.

In Asia, dried chrysanthemum flowers were used in bedding, which is historically significant because chrysanthemum is the natural source of pyrethrins, the compounds that later became the basis for modern natural pesticide families.

Camphor blocks placed under beds were standard practice in India and China for at least two thousand years. Regular airing, beating of mattresses, and exposure to sunlight also disrupted insect life cycles and reduced egg survival in ways that were well understood empirically long before the underlying biology was explained.

These Methods Have Always Worked

A PMC-published study of plant-based mosquito repellents in Tanzania documented clear protective efficacy from burning the leaves of Ocimum suave (also used to treat Malaria) and Ocimum kilimandscharicum against malaria vectors, plants local communities had been using for generations before any researcher arrived. The communities weren’t guessing, because they had accumulated centuries of field-tested observation that produced genuinely effective results.

Traditional systems lacked standardization and the ability to concentrate active compounds into stable doses. Modern plant-based products address that gap, but the core ingredients remain exactly the same ones humans identified through centuries of direct observation.

Window Screens, Door Barriers, and Physical Exclusion Through History

Beyond bed nets, physical barriers between living spaces and insects have taken many forms. Woven reed mats placed over doorways were common in ancient Egypt, functioning as rudimentary screens that reduced fly entry into food preparation areas.

In China and Japan, sliding paper screens allowed air circulation while blocking insects. The wire window screen didn’t arrive until the mid-nineteenth century, when mass production of fine wire mesh became feasible.

Its invention was considered transformative for public health in the United States, particularly in southern states where malaria was endemic. Before screens, wealthy households used interior mosquito curtains and heavily draped sleeping areas.

Why These Methods Remain Relevant Today

There’s a practical argument for revisiting these historic methods that goes beyond preference for natural living.

Chemical insecticides face growing resistance among mosquito populations, bedbugs in urban environments, and stored grain pests in commercial agriculture.

Plant-based repellents and physical barriers work through mechanisms far harder for insects to develop resistance to. Physical exclusion via fine mesh is simply not something a mosquito can genetically adapt around. The chemical complexity of aromatic plant oils, which contain dozens of different volatile compounds, makes full resistance development far more difficult than with single-molecule synthetic pesticides.

The practical toolkit that humans developed over thousands of years represents genuine, tested knowledge.

My Two Cents

After spending time with this research, my honest take is simple: the fact that lavender in your closet, smoke from the right plants, and a fine-mesh net over your bed actually work is not a quirky footnote in pest control history.

Human beings were solving the insect problem with remarkable sophistication thousands of years before synthetic chemistry came along, and they did it by paying close attention to what nature provided.

The instinct to reach for a chemical spray the moment a bug appears feels less like progress and more like forgetting. However, as I always say, it’s never a bad idea to look at how our ancestors survived, because if someday we will be forced to settle our societal disputes with stick and stones, such knowledge will keep us alive.