The invasive alien Leaf Miner Cameraria ohridella and the native tree Acer pseudoplatanus : a fatal attraction ?
pplyBrkRules··-·The horse-chestnut leaf miner Cameraria ohridella is an invasive moth/ in Europe and a serious pest of horse-chestnut Aesculus hippocastanum./ The moth also occasionally attacks sycamore maple Acer pseudoplatanus,/ when situated beside infested horse-chestnuts. The main objective of/ the present study was to provide an overview of the relationship/ between C. ohridella and A. pseudoplatanus and to determine whether C./ ohridella has the potential to shift to this native tree. In the/ field, females oviposit on different deciduous tree species. Although/ less frequently attacked than A. hippocastanum, A. pseudoplatanus was/ clearly preferred for oviposition over 12 other woody species/ investigated. Surveys in Europe demonstrated that the majority of A./ pseudoplatanus trees found beside infested A. hippocastanum had mines/ of C. ohridella, even though more than 70% of the larvae died within/ the first two instars. Attack rates and development success greatly/ varied from site to site. Attack levels on A. pseudoplatanus were not/ always correlated with those on A. hippocastanum, and mines on A./ pseudoplatanus were sometimes observed beside weakly-infested A./ hippocastanum. Field observations, experimental exposure of A./ pseudoplatanus saplings and rearing trials in a common garden study/ showed that individual trees may vary in their susceptibility to C./ ohridella, whereas there was no evidence that C. ohridella populations/ vary in their performance on A. pseudoplatanus. To date, there is/ little evidence that C. ohridella represents a major risk for A./ pseudoplatanus.