Understanding the health risks posed by Oak Processionary Moths (OPM) is essential for everyone, especially during the peak months when these pests are most active. In this article, we’ll explore the potential health risks from OPM, share insights from recent findings, including studies from the Natural History Museum, and offer practical advice on how you can protect yourself, your family, and your community.
What Makes OPM a Concern?
- Skin Irritation and Allergic Reactions
Did you know that contact with OPM caterpillar hairs can lead to severe skin rashes, itching, and even allergic reactions? These tiny hairs contain thaumetopoein, a toxin that can cause symptoms ranging from mild irritation to severe allergic reactions. Alessandro Giusti from the Natural History Museum explains, “While the caterpillars are a hazard themselves, the nests are worse because they contain not only the caterpillars but also their sheddings, which means that if the nest is disturbed, then it can cause a more serious reaction.” - Respiratory Problems
Breathing in these hairs can also cause significant respiratory problems. For those with asthma or other respiratory conditions, exposure can exacerbate symptoms, leading to discomfort and potentially serious health risks. Keeping a safe distance from infested areas during the OPM season is a wise precaution.
Real-Life Incidents and Government Response
Spread and Legislative Measures
“After arriving in London from Europe nearly 20 years ago, the species is spreading fast and could reach Birmingham in just over 10 years,” reports the Daily Mail. The spread of the species underscores the urgency of managing their population to prevent further health crises and environmental damage.
Public Health Impact
“Last year, 255 Brits fell ill due to the caterpillar, up from just 12 in 2014,” the Daily Mail noted. This statistic highlights the growing impact of OPM on public health, driven by their increasing spread across the UK.

Safety Precautions for the Public
Avoid areas known to be infested, especially during the caterpillar season. Wear protective clothing and seek medical advice if exposure occurs. Education and vigilance are key in preventing and minimizing the risks associated with these toxic caterpillars.
How Green Canopy Tree Consultancy Ensures Safe Handling and Removal
Our team uses specialised equipment and adheres to safety protocols to safely identify and remove OPM. We ensure that our methods, such as the safe removal of nests and treatment of affected areas, are conducted with the utmost care to prevent further contamination.

Looking Ahead: Protecting Our Community
By staying informed and proactive, we can collectively mitigate the risks posed by Oak Processionary Moths. Remember, early detection and professional management are key to controlling this pest and preventing its spread.
Ready to Learn More?
Next, we’ll dive into effective strategies for managing and controlling OPM infestations. Stay tuned for practical advice on keeping these pests at bay and safeguarding the health of our trees and communities.
Need Expert Advice?
If you’re concerned about OPM in your area or need professional assistance, contact Green Canopy Tree Consultancy today. We’re here to help ensure your environment is safe and healthy.



