RT Journal Article SR Electronic T1 Cultural Control of Cameraria Ohridella On Horsechestnut in Urban Areas by Removing Fallen Leaves in Autumn JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 253 OP 258 DO 10.48044/jauf.2003.029 VO 29 IS 5 A1 Francesco Pavan A1 Paola Barro A1 Iris Bernardinelli A1 Nadia Gambon A1 Pietro Zandigiacomo YR 2003 UL http://auf.isa-arbor.com/content/29/5/253.abstract AB Since the 1990s, the leafminer Cameraria ohridella has spread in central and southern Europe causing heavy damage on horsechestnut (Aesculus hippocastanum). Because biological control of the pest is not yet a reality, other measures must be adopted. Cultural control by removing fallen leaves of horsechestnut in autumn has often been proposed, and with this 3-year study the effectiveness of this practice under urban conditions has been shown and measured. The almost complete removal of leaves caused a significant reduction in infestation. The area of leaf surface injured decreased on average by more than 90% in early June, three quarters in late July, and a third in late August, and early leaf fall was always avoided. The proximity to sites with no leaf removal reduced the benefits of leaf removal as the season advanced. In the context of Integrated Pest Management, this cultural method contributes significantly to reduce C. ohridella damage.