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Oak Processionary Moth can cause serious defoliation of oak trees, their principal host. On the Continent they have also been associated with hornbeam, hazel, beech, sweet chestnut and birch, but usually only where there is heavy infestation of nearby oak trees.
As with many moth species, population levels tend to vary from year to year, but they also show longer term cycles in which the population builds up to high densities over a period of 3-4 years and then declines again to lower density. Although a native of central and southern Europe, the moth spread northwards during the latter half of the twentieth century. It was first recorded in The Netherlands in 1991, and subsequent reports of damaged trees indicate that numbers soared, with 1995 - 1996 and 2004 - 2005 being particularly bad years for tree damage. Populations declined between those years, but are again reaching very damaging levels in The Netherlands and neighbouring areas of Belgium and in parts of Germany.
This will be an outdoor practical assessment of some trees in North London.
10.15am Paul Muir, Arboricultural Consultant / Contracts Administrator from Treework Environmental Practice will carry out the static load test on a tree.
The static load test is the most up-to-date and detailed method for assessing tree stability. This has proved successful in both saving trees thought to be unsafe and thus condemned to be felled and for increasing public safety by identifying trees that are critically unstable.
This is achieved by measuring both the bending strength of the tree stem and the anchoring strength of the tree roots.
Static Load Test and Tree Structural Assessment Provides:
1pm Lunch in The Mill pub sponsored by City Suburban
Thank you to Andy Tipping at Barnet for arranging the meeting and to City Suburban for sponsoring the lunch.
Wednesday 13 July 2011 in Islington
Thank you to the tree officers at LB Islington for hosting the meeting and to Barcham trees for the refreshments teas, coffees and lunch.