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57 Search Results for TreeAlert

  • Tools and Resources

    Pine-tree lappet moth (Dendrolimus pini)

     Present in United Kingdom Notifiable – see ‘Report a sighting’ below Scientific name – Dendrolimus pini (D. pini) The larvae, or caterpillars, of pine-tree lappet moth are a serious pest of Scots pine (Pinus sylvestris) forests in some parts of continental Europe, periodically causing large-scale damage to them. They can also attack other coniferous tree species – see […]
  • Tools and Resources

    Emerald ash borer beetle (Agrilus planipennis)

     Information about the emerald ash borer beetle (EAB) (Agrilus planipennis), a damaging pest of ash trees.
  • Tools and Resources

    Thousand cankers disease (Geosmithia morbida)

     Not present in UK Notifiable – see ‘Report a sighting’ below Scientific name of causal agent – Geosmithia morbida (G. morbida) Vector – Walnut twig beetle (Pityophthorus juglandis; P. juglandis) Picture: Ned Tisserat, Colorado State University, Bugwood.org Thousand cankers disease is caused by the fungus Geosmithia morbida. It is believed to be able to affect all species of walnut trees […]
  • Tools and Resources

    Phytophthora austrocedri disease of juniper and cypress

     Overview of plant pathogen Phytophthora austrocedri – symptoms and diagnosis of juniper infection.
  • Tools and Resources

    Meeting Notes – 9th February 2022

     Meeting notes from 09/02/2022
  • Tools and Resources

    Meeting Notes – 9th February 2023

     10.30 – 13.00, Thursday 9th February 2023 (via Microsoft Teams) Meeting chair: David Slawson (DS), Imperial College London Microsoft Teams Organiser: Lucy Turner (LT), Forest Research, Alice Holt Decisions and actions THCSN Business Actions/matters arising from July 2022 meeting Action (A1) DS to revise and circulate to members the revised template. Action (A2) All members to submit to LT texts for their projects. Action […]
  • Tools and Resources

    Ash dieback (Hymenoscyphus fraxineus)

     Present in United Kingdom Reportable – see ’Report a sighting’ below Scientific name of causal agent – Hymenoscyphus fraxineus Ash dieback is a highly destructive disease of ash trees (Fraxinus species), especially the United Kingdom’s native ash species, common ash (Fraxinus excelsior). It is caused by a fungus named Hymenoscyphus fraxineus (H. fraxineus), which is of eastern Asian […]
  • Tools and Resources

    Horse chestnut leaf miner (Cameraria ohridella)

     Information about horse chestnut leaf miner moth (Cameraria ohridella), a pest of horse chestnut (Aesculus) trees and some Acer species
  • Tools and Resources

    Sweet chestnut blight (Cryphonectria parasitica)

     Present in UK Notifiable – see ‘Report a sighting’ below Scientific name of causal agent – Cryphonectria parasitica Picture: D. Rigling Sweet chestnut blight is a destructive disease of sweet chestnut trees (trees in the Castanea genus) caused by the ascomycete fungus Cryphonectria parasitica. It was formerly known as Endothia parasitica. It can also affect a few other plant species. Distribution The Cryphonectria […]