Alternatively, queries can be sent by e-mail to or by contacting the Department’s Offices on 01-505 8885. Nursery stock producers should direct queries to the local Plant Health Inspector immediately. What to doįorest owners, forest nursery staff, and members of the public are asked to be vigilant for the disease and report (with photographs, if possible) any sites where there are concerns about possible DNB symptoms in pine, to the Forest Service, Department of Agriculture, Food & the Marine, by e-mail or by phoning 01-607 2651. Trees with severe DNB infection will appear with mostly just the current years foliage intact. Due to the loss of the previous season’s needles, a 'bottle brush' appearance to the trees can result. The lower branches closer to the ground are often more affected. Early symptoms of dothistroma needle blight include resin-soaked needles with dark green bands and spots that may be dark green, yellow, or tan in color. Symptomsĭothistroma Needle Blight was previously referred to as red band needle blight because of the red and colourful bands displayed across the infected needles. Samples taken from Scots pine trees at the two forests in early August were analysed and laboratory results confirmed the presence of D. It was identified as being present on Scots pine trees at two privately owned (grant aided) forests, one in southwest Limerick and one in northwest Cork. In September 2016, DNB was found in Ireland for the first time. There are other less susceptible conifer hosts. To date Scots pine has been less severely affected in Britain. In Britain, Corsican pine has been the most severely affected pine species but severe damage to lodgepole pine has also been reported. But it doesn’t just infect shoots it infects branches and stems of any size. Pine tree species are the primary host of DNB. Perhaps it is called blight because infected branches and stems die quickly, as in a shoot blight. The disease was found in Northern Ireland in 2011 on Corsican pine. The disease is present in most other EU Member States and in many other countries outside the EU. Previously referred to as Red Band Needle Blightĭothistroma Needle Blight (DNB) is a disease that can be caused by the two fungal pathogens, Dothistroma septosporum and Dothistroma pini. The disease has been present in Great Britain since the 1950s and is now a very significant disease of pine species there. Dothistroma septosporum or Mycosphaerella pini is a fungus that causes the disease commonly known as red band needle blight. Botanic Gardens College of Horticulture.
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