Forestry and Tree Health Resources
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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...
Information about horse chestnut bleeding canker caused by the bacterium Pseuomonas syringae pv aesculi
How the provision of greenspace can increase invertebrate biodiversity in the urban environment
Present in United Kingdom Not notifiable – See ‘Report a sighting’ below Scientific name – Elatobium abietinum (E. abietinum) Picture: Donald Owen, California Department of Forestry and Fire Protection, Bugwood.org Green spruce aphid (Elatobium abietinum) is an important defoliating pest of spruce trees (trees in the Picea genus), especially Sitka spruce...
Explanation of British forestry authorities' policy on collecting foliage from plants susceptible to Phytophthora ramorum infection, especially Rhododendron ponticum, in forests and woodland
The changing climate presents a challenge for forest planning and forest management in England because the projected increases in temperature, changes in the seasonality of rainfall, and an increased frequency of extreme events add complexity to species selection and silvicultural practice. By actively adjusting forest management now, to anticipate future...
Issues and practical considerations of soil contamination in greenspace development in the urban environment
Overview of Phytophthora disease of alder (Alnus) caused by Phytophthora alni
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...
Forest Research’s Tree Health Diagnostic and Advisory Service: collecting and packaging samples for Phythophthora austrocedri infection testing
Information about elm zigzag sawfly (Aproceros leucopoda), now established in Great Britain, including its biology, the risk it poses to elms in Britain, and its identification
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