Hosts and geographic distribution of <i>Arceuthobium oxycedri</i>

Abstract

Data on hosts and geographic distribution of the juniper dwarf mistletoe, Arceuthobium oxycedri, are updated in light of changes in host nomenclature, political geography, and interpretation of reports and labels. Seventeen species of Juniperus, 3 Chamaecyparis, 5 Cupressus, and 1 Platycladus are reported as hosts. Infestations on several juniper hosts and all of its non-juniper hosts have resulted from introductions to areas within the natural range of the mistletoe. This dwarf mistletoe is reported from 31 countries across northern Africa, western Europe, the Balkans, Russia and other former Soviet Republics, the Near East, the Indian subcontinent, and western China. Previous reports from Bhutan and Hungary are corrected, and a report from Afghanistan is considered questionable. Located collection sites are shown on 13 regional and country maps. Juniper dwarf mistletoe is or is potentially an important disease agent in arid forests of numerous countries. Information on its hosts and distribution can help to make good decisions for maintaining forest health and productivity. Authors Acknowledgments

Infection patterns and hosts ofArceuthobium oxycedri(DC.)M.Bieb. inSlovenia

“…and Juniperus phoenicea L. It also infects species from the other genera, for example, Cupressus , Chamaecyparis , Thuja and Platycladus (Rios Insua ; Hawksworth and Wiens ; Ciesla et al. ).…”

“…Ciesla et al. () conducted a thorough review of the geographical distribution of A. oxycedri and its hosts. In reports on its presence in Slovenia, Croatia, Bosnia and Hercegovina, Serbia, Montenegro and Kosovo, they ascertain that A. oxycedri hosts were J. oxycedrus and J. communis as well as J. drupacea Labill.…”

“…It has the most extensive geographic distribution of the 42 recognized species of the genus Arceuthobium. Its range extends over 100°of longitude or about 10 000 km, from Spain and Morocco to Western China (Ciesla et al 2004). Its main host is Juniperus oxycedrus L., but it can infect Juniperus communis L. and some other species in the genus Juniperus, including Juniperus convallium Rehder et.…”

“…Wilson., Juniperus drupacea Labill., Juniperus excelsa M.-Bieb., Juniperus polycarpos K. Koch, Juniperus foetidissima Willd., Juniperus oblonga M.-Bieb. and Juniperus phoenicea L. It also infects species from the other genera, for example, Cupressus, Chamaecyparis, Thuja and Platycladus (Rios Insua 1987; Hawksworth and Wiens 1996;Ciesla et al 2004). Ciesla et al (2004) conducted a thorough review of the geographical distribution of A. oxycedri and its hosts.…”

Global and Regional IUCN Red List Assessments: 5

“…1820 Common name: vischio del ginepro (It), juniper dwarf mistletoe (En) Geographic distribution range: Arceuthobium oxycedri ( Fig. 1) is present in many countries bordering the Mediterranean Sea, in the Caucasus and central Asia (in many former Soviet republics), in the Indian subcontinent, and in western China (Ciesla et al 2002). In Italy, A. oxycedri has been reported from several sites, all close to each other and located in a small area between eastern Toscana and western Marche, in the Provinces of Arezzo (nine localities) and Pesaro/Urbino (six localities) (Brilli-Cattarini andGubellini 1983, Gonnelli andScarponi 2003;Fig.…”