Plane tree problem spreads to hospital

The mystery disease ailing plane trees in the Octagon appears to have cropped up in another part of the city.

One plane tree in Frederick St, outside the Dunedin Hospital entrance, appeared to have the same symptoms, Otago and Southland district health boards' regional compliance team leader Ralph Francis, said.

The matter is to be brought to the hospital advisory committee's attention today.

Mr Francis said contractors notified him late last year about the problem.

It did not seem to have spread to other trees in Frederick St, and was not visible except to a trained eye.

Dunedin City Council-owned company Delta advised the board to keep a watching brief on the plane tree over winter, in the hope frosts might kill off any infection.

The Dunedin City Council is awaiting the results of samples taken from the Octagon plane trees late last month.

They are expected from the Ministry of Agriculture and Forestry this month.

Last month, Dunedin tree consultant Frank Buddingh said he feared the trees were affected by an exotic vascular disease, known as Ceratocystis fimbriata, not seen before in New Zealand.

Four of the Octagon's 16 plane trees did not come into leaf this summer, and others show signs of infection.

- Eileen Goodwin