London pest takes control of Clapham Common oak tree

An oak tree on Clapham Common has been cordoned off to contain a hairy caterpillar that "should not be touched under any circumstances".

Oak processionary moth (OPM) is a tree pest whose caterpillars can cause itching skin rashes, sore throats and breathing difficulties in people and animals.

Since OPM was first spotted in Richmond in 2006, the hairy hazard has slowly but surely spread across south west London. Though the moths themselves are no huge menace, the thousands of tiny hairs covering its caterpillars pose a health risk to humans, pets and livestock during summer months when young OPM have not yet matured.

Their recent infestation of an oak tree on Clapham Common comes after the Forestry Commission urged members of the public – namely those living in London, where the moth is now well established – to be vigilant about reporting OPM sightings.

Andy Hall, Forestry Commission Operations Manager, said earlier this year: "It's really important for the public to be aware of the risk of tree pests like oak processionary moth and to report any sightings."

Trish Mannes, Deputy Director for Health Protection for Public Health England South East, said: "We strongly advise people not to touch or approach the caterpillars or their nests because of the health risks posed by the hairs.

"Pets and livestock can also be affected and should be kept away as well."

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