A study of chemical runoff following the use of acetamiprid as a pre-treatment and top-up spray to prevent damage from the large pine weevil (Hylobius abietis L.) to young trees was undertaken at a restock site in mid-Wales. The site was specifically selected to pose a high risk of chemical runoff, being a high elevation, […]
An analysis of relevant species trials was carried out to assess the productivity of potential alternative conifer species to Sitka spruce on upland site types in Britain. Data from 87 forest experiments planted between 1929 and 1995 were analysed to compare long-term performance of 52 species with that of Sitka spruce under the same conditions and site type.
Milder and wetter winters, followed by increased spring rainfall, are likely to enhance the survival and infection potential of many tree pathogens. Hotter, drier summers leading to drought stress in trees will also increase their susceptibility to disease and expand the distribution range of some pathogens. The increased incidence and severity of diseases caused by Phytophthora species reduces the benefits that trees provide, including climate change mitigation.
Genome sequencing is used to determine the origins and genetic diversity of Dothistroma populations throughout the UK, and confirms the findings of our earlier paper discerning population structure with microsatellite analysis.
Tree Pest Advisory Note A major defoliator of oak in Europe. This document details signs and symptoms of the named tree pest(s) or disease(s) and provides advice on what to do if you suspect the pest or disease is present. Related pages Main oak processionary moth resources page Research and advice on tree pests and […]
In UK forestry, the synthetic pyrethroid insecticides alpha-cypermethrin and cypermethrin have been used for many years to provide protection for young trees planted on restock sites from damage by the large pine weevil, Hylobius abietis L. However, concerns over the toxicity of these insecticides to aquatic life if misused has led to a search for alternative forms of protection. This paper describes a detailed programme of efficacy experiments undertaken between 2009 and 2014 to find replacements for these products. Over 50 combinations of chemical and non-chemical approaches were tested on 16 different sites.
• Novel dendrochronological modelling was developed to explore oak stem growth trends.
• Trees with long-term AOD symptoms may have been predisposed many decades earlier.
• Diseased trees struggle to take advantage of favourable growing conditions.
• Historic episodes of stress may impact the future resilience of oaks to disturbance.
This report reviews and summarises some of the key evidence from around the world on values associated with ash trees, and the management decisions about both ash dieback and emerald ash borer. The evidence on values focuses on historical, social and cultural values while the parts on management decisions looks at actual decisions taken as […]
The six main foliar pathogens already causing significant damage to conifers and broadleaved tree species in the UK are described along with the likely impact of climate change on their spread and severity.
Acetamiprid, chlorantraniliprole, and in some situations the physical barriers MultiPro® or Kvaae® wax, can be alternatives to traditional synthetic pyrethroid insecticides for the protection of young conifers from damage by the large pine weevil Hylobius abietis L.
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