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Publish Date:

1812 Search Results for Research

  • Tools and Resources

    OPM Manual – 8. Occupational health

     Oak processionary moth (OPM) caterpillars, or larvae, are covered with thousands of minute, irritating hairs. These can be released as a defence mechanism, or blown off by the wind, and come into contact with people and animals. Contact can cause symptoms ranging from a mildly itching rash to allergic reactions. The caterpillars build communal nests on the trunks […]
  • Tools and Resources

    Pest and disease resources

     Pest and disease resources and advice from Forest Research
  • Tools and Resources

    Other common pest and disease problems of horse chestnut

     Overview of common pests and pathogens of horse chestnut.
  • Tools and Resources

    OPM Manual – 7. Manual removal of nests and larvae

     The first thing to consider when planning to manually remove oak processionary moth (OPM) nests and caterpillars (larvae) is personal protection from contact with the caterpillars’ irritating hairs. It is not only the caterpillars which pose a risk: OPM nests (pictured below) also contain thousands of hairs shed by the caterpillars. These continue to pose a health hazard, either through […]
  • Tools and Resources

    OPM manual – 6. Chemical control of larvae

     Two pesticides are licensed for control of the larvae, or caterpillars, of oak processionary moth (OPM). These are Bacillus thuringiensis var kurstaki (BT) and deltamethrin. Further information about them is available on the Health & Safety Executive (HSE) website. The status and availability of chemicals can change from year to year, so it is important to […]
  • Tools and Resources

    OPM Manual – 1. Introduction and contents

     Introduction to the manual of advice for people who own or manage oak trees in areas of England affected by oak processionary moth (Thaumetopoea processionea)
  • Tools and Resources

    OPM manual – 3. Management zones

     If you own or manage oak trees in the area affected by oak processionary moth (OPM), you need to check which OPM management zone your trees are in. This will help you to decide what action you need to take. There are currently three geographically-distinct OPM management zones. Established area This is the area where OPM is established in the South […]
  • Tools and Resources

    OPM Manual – 2. Public and animal health advice

     Your first duty as an owner or manager of oak tree or trees in the areas affected by oak processionary moth (OPM) is to protect yourself and others, and pets and livestock, from the health risks which the pest poses. The caterpillars (larvae) develop tiny, irritating hairs from their third (L3) growth stage onwards to pupation. […]
  • Tools and Resources

    Ecological Site Classification (ESC)

     A web-based decision support system for British forests
  • Tools and Resources

    OPM Manual – 5. Surveying trees and timing of control measures

     Guide to surveying oak trees for signs of oak processionary moth (Thaumetopoea processionea) and when to apply control measures
  • Tools and Resources

    OPM Manual – 4. Biology and life cycle

     Understanding the biology of oak processionary moth (OPM) can help you to manage it. The caterpillars are the larval stage of the insect’s life cycle. OPM gets part of its common and scientific names from the caterpillars’ distinctive habit of moving around in nose-to-tail processions on trees, and sometimes on the ground beneath host trees. They also frequently cluster […]
  • Tools and Resources

    Hylobius Management Support System (MSS)

     A decision support system to help foresters predict and reduce damage and costs due to large pine weevil, Hylobius abietis.