Two invasive alien insect species, Leptoglossus occidentalis (Heteroptera: Coreidae) and Cydalima perspectalis (Lepidoptera: Crambidae), and their distribution and host plants in Istanbul Province, Turkey.
The western conifer seed bug, Leptoglossus occidentalis (Heidemann, 1910) (Heteroptera: Coreidae), is an invasive alien species of North American origin (McPherson et al. 1990). In Europe, it was first collected in Italy in 1999 (Tescari 2001). From there, it quickly expanded its range to western and eastern Europe (Bernardinelli & Zandigiacomo 2001; Hradil 2008; Kment & Banar 2008; Lis et al. 2008; Rabitsch 2008; Simov, 2008; Werner 2011). Leptoglossus occidentalis was recorded for the first time in Sariyer, Turkey in 2009 (Arslangundogdu &Hizal 2010).
Leptoglossus occidentalis is specialised to conifers. It has been recorded from about 40 species of conifers, mostly from pines (Pinales: Pina ceae), e.g., Coulter pine (Pinus coulteri D. Don), Aleppo pine (P. halepensis Mill.), Jeffrey pine (P. jeffreyi Balf.), sugar pine (P. lambertiana Douglas), western white pine (P. monticola Douglas ex D. Don), mugo pine (P. mugo Turra), Austrian pine (P. nigra J. F. Arnold), Italian stone pine (P. pinea L.), Ponderosa pine (P. ponderosa P. Lawson & C. Lawson), Monterey pine (P. radiata D. Don), red pine (P. resinosa Alton), California foothill pine (P. sabiniana Douglas), eastern white pine (P. strobus L.), and Scots pine (P. sylvestris L.), but also on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco), big-cone Doulas fir (P. macrocarpa [Vasey] Mayr), eastern hemlock (Tsuga canadensis Carriere), mountain hemlock (T. mertensiana (Bong.) Carriere), incense cedar (Calocedrus [=Libocedrus] decurrens (Torr.) Florin [Pinales: Cupressaceae]), white fir (Abies concolor [Gord. & Glend.] [Pinales: Pinaceae]), California red fir (A. magnifica A. Murray), white spruce (Picea glauca [Moench] Voss; [Pinales: Pinaceae]) and Italian cypress (Cupressus sempervirens L. [Pinales: Cupressaceae]) (e.g., Koerber 1963; McPherson et al. 1990; Gall 1992; Vanin et al. 2005; Kment & Banaf 2008; Protic 2008; Maltese et al. 2009).
Leptoglossus occidentalis feeds on young developing cones and may cause abortion of young conelets, fusion of seeds to cone scales as well as direct damage by depletion of the lipid and protein content of the seed up to its complete emptying (Bates et al. 2000a, b). Tiberi (2007) listed L. occidentalis among pests of Pinus pinea cultivated in Italy. Uyemoto et al. (1986) reported damage caused by L. occidentalis on cultivated pistachio.
Box tree moth Cydalima perspectalis (Walker, 1859) (Lepidoptera: Crambidae) is an invasive alien species of East Asia origin. The natural range of the C. perspectalis is the humid subtropical regions of East Asia, India, China, Japan, Korea and Russian Far East (Mally & Nuss, 2010). In Europe, it was reported for the first time in 2007, in Germany (Billen 2007). In subsequent years, C. perspectalis (Walker 1859) continued to spread in Germany and nearby countries (Straten & Muus 2010). Cydalima perspectalis was recorded for the first time in Sariyer, Turkey in 2011 (Hizal et al. 2012).
Cydalima perspectalis causes damage on Japanese box (Buxus microphylla Siebold & Zucc.; Euphorbiales: Buxaceae), common box (B. sempervirens L.), Chinese boxwood (B. sinica [Rehder & E. H. Wilson] M. Cheng), Japanese spindletree (Euonymus japonicus Thunb.; Celastrales: Celastraceae), Burningbush (E. alata (Thunb.) Siebold), Purple holly (Ilex purpurea Hassk.; Aquifoliales: Aquifoliaceae) (Maruyama 1993; Kawazu et al. 2007, 2010; Straten & Muus 2010; Korycinska & Eyre 2011). The plants lose all of their leaves as a result of the attack of this moth.
Here I report on the distribution and host plants of L. occidentalis and C. perspectalis in the Istanbul Province Turkey.
Materials and Methods
Leptoglossus occidentalis especially prefers coniferous trees and damages young developing cones. For this reason, coniferous tree species distribution areas were marked on forest management plan maps. The marked points included possible areas of damage. The species is much easier to find in the late summer and fall when it is seeking out overwintering locations. Possible areas of damage were visited 4 times each month between the dates Sep-Dec 2009, Aug-Dec 2010, and Aug-Dec 2011. Adults were captured by using an insect net on the needles, cones and insects in flight. Bird nest boxes, the loose bark of trees, and buildings near the possible areas of damage were investigated.
Cydalima perspectalis larvae damage boxwood leaves. Buxus species are widely used for decorative purposes in parks and gardens. European and Asian (Anatolian) sides of the parks and gardens were visited 2 days a week starting on 20 Jun 2011. Leaves were searches for C. perspectalis larvae.
All data concerning the presence of these pests were transferred to tables and maps, and specific mapped locations were sampled to ascertain the distribution of these 2 adventive species.
Leptoglossus occidentalis was first recorded from the Istanbul Province on 14 Sep 2009 in the Fatih Forest at Sariyer-Istanbul. Sampling locations and host plants on which L. occidentalis was observed for all sampling dates are listed in Table 1; and these same locations are displayed on the map of sampling locations, Fig. 1. Consistent with earlier host plant records, L. occidentalis was observed in the Istanbul Province on Pinus nigra, Pinus pinea, Pinus radiata and Abies concolor.
Cydalima perspectalis was recorded for the first time in the European side of Sariyer-Istanbul in Turkey on 15-VI-2011, and the species was particularly abundant in the Sariyer district. Cydalima perspectalis was not detected in the Asian side of Istanbul until 30-VII-2011 (Hizal et al. 2012).
Host plants on which C. perspectalis specimens were recorded and their locations are listed in the Table 2, and shown in Fig. 2. Only Buxus sempervirens, common boxwood, and B. sempervirens cv 'aureavariegata', golden variegated boxwood, were noted as host plants in Istanbul Province. I observed severe damage to Buxus spp. in the parks and gardens of Istanbul Province, where these boxwoods are used extensively in topiary plantings.
In 2009 L. occidentalis was observed only on the European side of Istanbul, but in 2010, it was recorded for the first time from the Asian (Anatolian) side. At a minimum, the water barrier to dispersal in Istanbul is 700 m wide between Kandilli point and Asiyan. This may have slowed down, but clearly did not stop, the spread of this very strong flier. It may be that the presence of large plantation areas in Istanbul Province contributed to ease with which this species has spread in Turkey. Because L. occidentalis is known as a pest of cultivated pistachio (Uyemoto et al. 1986), it's presence in Turkey potentially threatens cultivated Pistacia vera L. (Sapindales: Anacardiaceae) in Turkey.
There are 2 natural Buxus species (Balearic box-Buxus balearica Lam., and Common Box-B. sempervirens L.) in Turkey (Yaltirik and Efe 2000). Cydalima perspectalis is a new harmful species that poses a great threat to both natural Buxus species and also the ones used in parks and gardens.
Our understanding of the biology, distribution, host plants, chemical and biological control methods of Leptoglossus occidentalis and Cydalima perspectalis in Turkey is far from adequate. Additional studies are needed to assess the extent of the threat posed by these 2 invaders, and to develop appropriate preventive or response strategies.
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Department of Forest Entomology and Protection, Istanbul University, Faculty of Forestry, 34473 Sariyer Istanbul, Turkey
Table 1. Leptoglossus occidentalis distribution and host plants, each number in parentheses is a point on the map shown in Fig. 1. Periods When Systematic Sampling Was Conducted Between 14 Sep 2009 and 30 Dec 2009 European Asian (Anatolian) Host Plant Side Side Pinus nigra Fatih Forest (1) Anadolu Feneri (8) (Not detected) Rumeli Feneri Road (2) Polonezkoy (9) (Not detected) Koc University Kanlica (10) Campus (3) (Not detected) Istanbul University Beykoz (11) Forestry Faculty (Not detected) Campus (4) Alemdag (13) (Not detected) Pinus pinea Fatih Forest (1) Alemdag (13) (Not detected) Ataturk Arboretum (5) Anadolu Feneri (8) (Not detected) Pinus radiata Feneryolu (6) Abies concolor Ataturk Arboretum (5) (Not detected) Between 10 Aug 2010 and 30 Dec 2010 European Asian (Anatolian) Host Plant Side Side Pinus nigra Fatih Forest (1) Anadolu Feneri (8) Rumeli Feneri Road (2) Polonezkoy (9) Koc University Kanlica (10) Campus (3) Istanbul University Beykoz (11) Forestry Faculty Campus (4) Pinus pinea Fatih Forest (1) Beykoz (11) Ataturk Arboretum (5) Demircikoy (7) Pinus radiata Feneryolu(6) Abies concolor (Not detected) (Not detected) Between 15 Aug 2011 and 30 Dec 2011 European Asian (Anatolian) Host Plant Side Side Pinus nigra Fatih Forest (1) Anadolu Feneri (8) Rumeli Polonezkoy (9) Feneri Road (2) Koc University Kanlica (10) Campus (3) Istanbul University Beykoz (11) Forestry Faculty Campus (4) Tayakadin (12) Alemdag (13) Pinus pinea Fatih Forest (1) Alemdag (13) Ataturk Arboretum (5) Pinus radiata Feneryolu(6) Abies concolor (Not detected) (Not detected) Table 2. Cydalima perspectalis distribution and host plants, each number in parentheses is a point on the map shown in Fig. 2. Periods When Systematic Sampling Was Conducted Between 20 Jun 2011 and 30 Jul 2011 Host Plant European Side Asian (Anatolian) Side Buxus Istanbul Univ. Forestry Uskudar (7) Not detected sempervirens Faculty Campus (1) Fatih Forest (2) Beykoz (8) Not detected Yenikoy (3) Emirgan (4) Zekeriyakoy (5) Buxus Istanbul Univ. Forestry Faculty Campus (1) sempervirens cv. 'aureavariegata' Later than 30 Jul 2011 Host Plant European Side Asian (Anatolian) Side Buxus Istanbul Univ. Forestry Near woods, Fethipasa sempervirens Faculty Campus (1) -Uskudar (7) Fatih Forest (2) Beykoz (8) Yenikoy (3) Emirgan (4) Zekeriyakoy (5) Kemerburgaz (6) Buxus sempervirens cv. 'aureavariegata'
Please note: Some tables or figures were omitted from this article.
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|Date:||Jun 1, 2012|
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