Trees treated for moth infestation

03 July 2009

A number of oak trees in St Helier are being treated with pesticide to control a severe outbreak of Oak Processionary Moth. Two of the affected trees, which are inaccessible to the available treatment methods and are infested at a scale not seen before, will be felled because of their sensitive location.

Oak Processionary Moth is a risk to human health as its caterpillars are covered in hairs that contain a toxin and can cause skin irritation and allergic reactions in anyone who inhales them or comes into contact with them.

The Chief Officer for Planning and Environment, Andrew Scate, said:
“It is very unfortunate that we have to take the radical step of cutting down two healthy Oak trees. But these caterpillars can cause severe allergic reactions and if we don’t control them now, the caterpillars will turn to moths and the problem will soon spread across the island. Unfortunately extraordinary levels of infestation in sensitive locations require extraordinary measures.

“We have been monitoring and treating trees affected by the caterpillars for the last 2 years, but this outbreak is substantial and it’s likely other areas of the island will also be affected. We will replant to replace the trees we are losing, but this is an invasive pest that we must control if we are to contain the outbreak and protect human health.”

The trees affected in People’s Park have been cordoned off; along with one next to the children’s play area in the Parade. The Planning and Environment Department, Parish of St Helier and Transport and Technical Services are working together to make the situation safe.

Dr Susan Turnbull, Deputy Medical Officer of Health, commented:
“Contact with the hairs of this caterpillar can cause intensely itchy or painful skin rashes, and even sore throats, eye problems and breathing difficulties. It’s not just touching the hairs that can cause  problems. The wind can also blow the hairs into contact with people.”

Anyone with a severe reaction, or who is uncertain what has caused their rash, should consult their GP.

If you think you may have found Oak Processionary caterpillars, or their nests, please do not touch or try to deal with them.  Instead, please report any sightings, with as much detail as possible on their precise location, to the Environment Department at Howard Davis Farm.