Data on the influence of climatic factors and the leaf miner Cameraria ohridella on growth and condition of European horse-chestnut Aesculus hippocastanum_Straw and Williams 2025
Description
Raw data on the percentage leaf area damaged by Cameraria ohridella from 2003 to 2023, and corresponding measurements of radial increment and percentage crown density of Aesculus hippocastanum.
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Steps to reproduce
Damage caused by Cameraria ohridella recorded in July and September each year as % leaf area damaged following the method of Gilbert & Gregiore (2003), Journal of Applied Entomology 127, 354-359. https://doi.org/10.1046/j.1439-0418.2003.00757.x Stem radial increments of Aesculus hippocastanum calculated from girth (stem circumference) measured at 1.3 m above ground in September each year. % crown density is a visual estimate of canopy condition comparing the appearance of the tree with that of an idealised fully foliated tree. See Innes (1990), Anon (2001), Redfern & Boswell (2004). Branch dieback was measured on a scale of 0 = none, 1 = light, 2 = moxerate, 3 = severe (Innes, 1990).
Institutions
- Forest Research