Arboriculture & Urban Forestry 40(3): May 2014 Arboriculture & Urban Forestry 2014. 40(3): 143–164 143 Review of Host Trees for the Wood-Boring Pests Anoplophora glabripennis and Anoplophora chinensis: An Urban Forest Perspective Henrik Sjöman, Johan Östberg, and Johan Nilsson Abstract. Two devastating insect pests have been introduced to North America and Europe – the Asian longhorned beetle (ALB) (Ano- plophora glabripennis) and the citrus longhorned beetle (CLB) (Anoplophora chinensis). These two wood-boring beetles are argued to be one of the most serious threats to the tree landscape since they have a large number of host species and genera. With the aim of creating an up-to-date compilation of these hosts, a systematic review was made of the literature for information on tree species attacked and used by ALB and CLB as hosts for complete life cycle or for feeding. This review revealed that a large number of tree species and genera are liable to be attacked by ALB and CLB. However, based on the findings, the whole picture is still unclear. One reason for this is the lack of transparency in published studies regarding lists of susceptible tree species for ALB and CLB. Another factor that needs to be reported is whether a tree species supports the complete life cycle of the beetles or just feeding by adult beetles. Without this information, spe- cies possessing moderate host qualities are at risk of being incorrectly labelled as very good hosts and hence excluded as urban trees. Key Words. Anoplophora chinesis; Anoplophora glabripennis; Asian Longhorned Beetle; Citrus Longhorned Beetle; Host; Pests; Review; Tree Selection; Urban Trees; Wood-boring Pests. Today, the urban forest and its constituent trees are much more than an aesthetic green element in cit- ies. Aspects such as biological diversity, stormwater management, pollution relief, beneficial and recre- ational impacts on human well-being, and urban heat island mitigation are some of the services ur- ban tree vegetation provides for city dwellers (For- man and Godron 1986; Grahn and Stigsdotter 2003; Maco and McPherson 2003; Tyrväinen et al. 2005; Geldof and Stahre 2006; Nowak et al. 2006; King and Davis 2007). In the compact city, the quali- ties provided in large parks and green areas will be compressed into smaller scale units or alternative green structures, increasing the demands on ca- pacity load and performance level of future urban green space and future urban trees (Sjöman et al. 2012a). Since trees are long-lived organisms and their capacity to deliver ecosystem services is not completely developed until they are fully grown individuals, it is of the utmost importance that the trees selected today last into the future. How- ever, today’s urban trees and forests are facing great difficulties with pests and diseases and with a chang- ing climate, which can compromise their future development and functions. It is therefore important to determine which species and genera of trees can meet these future challenges (Sjöman et al. 2012b). In the last decades, two important and devas- tating insect pests have been introduced to North America and Europe – the Asian longhorned beetle (ALB) (Anoplophora glabripennis) and the citrus longhorned beetle (CLB) (Anoplophora chinensis). These two wood-boring beetles are argued to be one of the most serious threats to the tree landscape since they have a large number of host species and genera (e.g., MacLeod et al. 2002; Raupp et al. 2006; Hu et al. 2009; Haack et al. 2010). Well-known hosts for ALB in China include species of Acer, Alnus, Betula, Eleagnus, Fraxinus, Malus, Platanus, Popu- lus, Pyrus, Salix, Sophora, and Ulmus (Haack et al. 2010). In the United States, ALB has completed development on species in the genera Acer, Betula, Fraxinus, Pyrus, Salix, and Ulmus, but also in spe- cies of Robinia (Haack et al. 2010), indicating that this beetle is expanding its host range as it invades new territories and encounters new potential host ©2014 International Society of Arboriculture
May 2014
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