Processionary caterpillars in the Val-de-Marne

Destruction of oak and pine processionary caterpillar nests and protection of parks and gardens against the urticating hairs, which are dangerous for children, animals and allergy sufferers.

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Processionary caterpillars in the Val-de-Marne
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The essentials at a glance

Treating processionary caterpillars addresses a genuine health hazard: their urticating hairs cause severe skin and eye reactions, and can be fatal to a dog. It combines nest removal, trapping on the trunk and, in season, a biological treatment of the tree. AntinuisiblePro works on pines and oaks across the Val-de-Marne.

AntinuisiblePro handles your Processionary caterpillars in Champigny-sur-Marne and across the whole Val-de-Marne (94). Discover our service and pick your town.

Destruction of oak and pine processionary caterpillar nests and protection of parks and gardens against the urticating hairs, which are dangerous for children, animals and allergy sufferers.

How to spot a processionary caterpillar nest

  • A clearly visible white silk nest at the tip of an oak or pine branch
  • Processions of caterpillars descending the tree in single file, especially in spring
  • Urticating hairs scattered on the ground, lawns or benches beneath the tree
  • Skin reactions, itching or eye irritation after walking nearby

Why processionary caterpillars are dangerous

The urticating hairs of oak and pine processionary caterpillars detach and cling to clothing, skin and mucous membranes. They cause itching, conjunctivitis, asthma attacks and severe allergic reactions, particularly in children and pets. The risk persists for several years after nesting.

The processionary caterpillars we treat

  • The pine processionary (Thaumetopoea pityocampa): silky white nests visible in winter at the tips of pine branches.
  • The oak processionary (Thaumetopoea processionea): nests pressed against the trunk and main branches, active in spring.
  • The caterpillars marching in single file along the ground, at the point when they descend to burrow.
  • Winter nests, still dangerous even when empty: the urticating hairs stay active inside them for years.

Understanding processionary caterpillars better

Each caterpillar carries hundreds of thousands of microscopic barbed hairs that detach at the slightest stress and disperse into the air. They contain an urticating protein, thaumetopoein, responsible for skin rashes, conjunctivitis and respiratory reactions. In dogs, which sniff the procession on the ground, contact with the tongue causes tongue necrosis: an absolute veterinary emergency. The key point: these hairs stay urticating for years inside an empty nest and go airborne again the moment it's touched — an abandoned nest is not a harmless nest. The procession down to the ground takes place in late winter and spring, depending on the weather.

Our method against processionary caterpillars

  1. Locating and identifying nests in oaks and pines
  2. Nest destruction by safe vacuum removal with full protective equipment
  3. Treatment of the tree and surrounding area to neutralise urticating hairs
  4. Prevention and monitoring advice for the following season

When should you call a professional?

Never touch a nest, even an empty one, and don't try to burn it or hose it down: you'd scatter the urticating hairs over yourself and the surrounding area. Call a properly equipped professional as soon as there is a nest on your property, all the more so if you have children, a dog, or a school or play area nearby. In the event of contact, rinse thoroughly without rubbing and seek medical advice; if a dog has licked a caterpillar, get to the vet immediately.

Mistakes to avoid

  • Burning or hosing down the nest: heat and water throw the urticating hairs into the surrounding air.
  • Removing a nest yourself, even in winter and even when empty: the hairs stay urticating for years.
  • Mowing or leaf-blowing under an infested pine: the hairs on the ground go airborne again.
  • Assuming the danger has passed once the caterpillars have come down: the ground and the nest stay contaminated.

Preventing a new infestation

  • Monitor oaks and pines from the end of winter and report any nest
  • Keep children and animals away from affected areas
  • Remove nests by hand only with full protective equipment, never by burning on site

Our results guarantee

A successful treatment isn't judged on the day itself but a few weeks later. That's why we schedule a follow-up inspection and come back at no cost if the pest reappears during the guarantee period.

How much does a Processionary caterpillars cost?

The price always depends on the survey: type of pest, surface area, level of infestation, accessibility and the number of visits required. We publish indicative price ranges in full transparency, and every quote is free, itemised and with no obligation.

See our price ranges

Frequently asked questions about Processionary caterpillars

Can you destroy a caterpillar nest yourself?

It is not recommended: handling and especially burning the nest disperses urticating hairs into the air and worsens the risk. Only an intervention with vacuum removal and full protective equipment eliminates the nest safely.

What should I do if my dog has licked a processionary caterpillar?

Rinse the mouth thoroughly with clean water, without rubbing, and get to a vet immediately. Contact causes tongue necrosis and the outcome depends directly on how quickly treatment starts: this is a veterinary emergency, not a wait-and-see situation.

What time of year should treatment take place?

Nest removal is carried out in autumn and winter, when the nests are visible and the caterpillars grouped together. Collar traps go onto the trunk before the descent, in late winter. A biological treatment of the tree, meanwhile, is applied in autumn, on the young caterpillars. Our survey determines the right course of action for the season and the stage observed.

Are empty nests dangerous?

Yes, and it's the most common trap. The urticating hairs stay active for years in an abandoned nest and go airborne again at the slightest contact. An empty nest must be removed by a properly equipped professional, exactly like an occupied one.

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How your Processionary caterpillars works, step by step

Every job follows the same sequence, from your first call through to the follow-up inspection. You know exactly what will happen in your home before we arrive.

01

Free inspection

We identify the pest, the extent of the infestation and its access points.

02

Detailed quote

A transparent, no-obligation quote suited to your situation.

03

Targeted treatment

Approved, safe treatments applied by certified technicians.

04

Follow-up & prevention

Control visit and advice to prevent any return.

Why trust AntinuisiblePro with your Processionary caterpillars

Certified technicians

Our technicians are fully trained and hold the Certibiocide certification, which is mandatory for applying professional-use biocidal products.

A local company

Based in Champigny-sur-Marne, we cover the whole of the Val-de-Marne. One point of contact, always reachable, who knows the area inside out.

A results guarantee

If the pest comes back within the guarantee period, we return at no extra cost until it is completely eradicated.

Discretion and traceability

Unmarked vehicles, discreet visits, and a detailed report after every call-out — essential for business customers.

Processionary caterpillars near you

We operate in many towns across the Val-de-Marne. Select your town:

Further reading on processionary caterpillars

Line of pine processionary caterpillars moving in procession on the ground

Processionary caterpillars: an urticating pest classified as a health hazard

Classified as harmful to human health since 2022, pine and oak processionary caterpillars are spreading northward. Here is how to recognise them, protect your family and pets, and react effectively.

Close-up of an oak processionary caterpillar covered in urticating hairs

Oak processionary caterpillar: the summer 2026 health risk

Stinging rashes, asthma attacks, dogs at risk: the oak processionary caterpillar (Thaumetopoea processionea) stays active until August. Here is the 2026 framework and the right reflexes to adopt.

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