Host plants of Anoplophora glabripennis, a review.
Anoplophora glabripennis (Asian longhorned beetle) attacks many different broadleaf tree species. Although there is no doubt that A. glabripennis can complete its life cycle on species belonging to various genera such as Acer, Populus, Salix and Ulmus, there is conflicting information about the host plant status of many other species. Plant species may have been listed because of maturation feeding or oviposition, without evidence that A. glabripennis can actually complete its life cycle on these species. In the present review, 34 plant taxa that have been listed as A. glabripennis-hosts are placed in four different categories based on information available through literature search and by personal communication with experts. The categories are: (I) plant species on which A. glabripennis has been reported to complete its life cycle (from oviposition to emergence of new beetles) under field conditions, (II) plant species on which A. glabripennis has completed its life cycle in laboratory or semi-field experiments (i.e. plants and beetles reared in cages), (III) plant species on which A. glabripennis has been reported to complete part of its life cycle, and (IV) others. The following genera were placed in category I: Acer, Aesculus, Betula, Cercidiphyllum, Fraxinus, Platanus, Populus, Salix and Ulmus. The species Albizia julibrissin, Corylus colurna, Elaeagnus angustifolia, Fagus sylvatica, Koelreuteria paniculata, Malus domestica, Pyrus bretschneideri and Sorbus aucuparia were also placed in category I, although records on exit holes were limited. These species may be rather poor or unattractive hosts on which A. glabripennis may only incidentally oviposit and/or complete its life cycle or the species may be rather uncommon in outbreak areas thus far and, therefore, not frequently attacked. Elaeagnus angustifolia has also been reported to be resistant. For some of the species listed the host plant status may need confirmation. The list of category I species may also become longer in the future because several of the plant species listed only recently appeared to be true hosts, i.e. supporting completion of the full life cycle of A. glabripennis.