1,705 research outputs found
The grapevine aphid Aphis illinoisensis : a good example of recent invasion and rapid colonization by aphids
Aphis illinoisensis represents one of the most recent aphid invaders from the New World to the
Mediterranean Region. This aphid, which is native to North America and is now widely distributed
in Central and South America, was first found in Southern Turkey in 2002, and in 2005 it was also
found in Crete (Greece). Thereafter it was recorded from Northern Cyprus, Israel, Tunisia, Algeria,
Montenegro and Libya, and is now probably present throughout the Mediterranean. The present
work provides data on the presence of this aphid in the Maltese islands, a group of low-lying islands
situated in the central Mediterranean Basin.peer-reviewe
First report of an adelgid from Malta (Hemiptera, Aphidoidea, Adelgidae)
In recent years, the aphid fauna of the Maltese Islands has received considerable attention. miFSud et al. (2011) reviewed earlier works on the subject and provided information on previously reported species and on several new records. An updated list of aphids provided therein included 98 Aphididae and a single species of Phylloxeridae. The only other family currently included with aphids, the Adelgidae was not represented in the list. Samples of young shoots of Pinus halepensis Mill. were observed infested with a whitish flocculent material in several localities in Malta and examination of this material proved it to belong to an adelgid which we report here underpeer-reviewe
Cinara tujafilina (del Guercio, 1909) - a new aphid record for Malta (Aphididae, Lachninae)
The aphidofauna of the Maltese archipelago is currently composed of some one hundred recorded species (Mifsud & Pérez Hidalgo, 2011; Mifsud et al. 2011) of which only six species are associated with conifers. Of these, three species belong to the genus Cinara: C. maghrebica, C. palaestinensis (both recorded on Pinus halepensis) and C. cupressi (recorded on Cupressus sempervirens). Identification of a recently captured single alate viviparous female of Cinara, based on Binazzi & Scheurer (2009) and Nieto Nafría et al., (2003), proved to be Cinara (Cupressobium) tujafilina (del Guercio, 1909), a species not previously recorded from Malta.peer-reviewe
First field records of the sexuales (males and oviparae) of Toxoptera aurantii (Hemiptera : Aphididae)
Toxoptera aurantii (Boyer de Fonscolombe) is an aphid pest of great agricultural importance, not only due to its
polyphagy but mostly due to its ability to transmit various plant viruses e.g. Citrus tristeza virus on Citrus (Blackman &
Eastop, 2000). Blackman & Eastop (2000) considered this aphid to be entirely anholocyclic, because no sexual morphs
have ever been observed in the field.peer-reviewe
Aphids (Hemiptera: Aphidoidea) associated with native trees in Malta (Central Mediterranean)
In the present study 25 aphid species which are known to be
associated with trees in the Maltese Islands are recorded. Of these, 18 species
represent new records; these include Aphis craccivora, Brachyunguis tamaricis,
Cavariella aegopodii, Chaitophorus capreae, C. populialbae, Cinara cupressi,
C. maghrebica, C. palaestinensis, Essigella californica, Eulachnus rileyi, E.
tuberculostemmatus, Hoplocallis picta, Lachnus roboris, Myzocallis schreiberi,
Tetraneura nigriabdominalis, Thelaxes suberi, Tinocallis takachihoensis and
Tuberolachnus salignus. A number of the above mentioned species alternate hosts
between the primary host, being the tree species, and secondary hosts being mainly
roots of grasses. The record of Tetraneura ulmi could be incorrect and could possibly
be referred to T. nigriabdominalis. Most of the aphid species recorded in the present
study have restricted distribution in the Maltese Islands due to the rarity of their host
trees. This is particularly so for those aphids associated with Populus, Quercus, Salix
and Ulmus whose conservation should be addressed.peer-reviewe
Present status of aphid studies in Malta (Central Mediterranean) with special reference to tree dwelling species.
A critical review of aphid literature dealing with Maltese records revealed the presence of 50 species. Most of
these records were included in local journals, some of which not accessible to the rest of the scientific community.
Because of this, the Fauna Europaea Project and other works about aphids in Europe included only a few aphid records
from Malta. In the present paper all names are corrected and updated and doubtful records have been highlighted.
Although many species of trees which are known to host aphids are lacking in Malta, and those present are often rare
and with confined distributions, aphid records total 25 species and most of these aphids can be considered as locally
rare.peer-reviewe
Greenidea Ficicola : is it an example of rapid colonization due to climatic changes?
In recent years, several species of aphids of tropical or subtropical origins are being found outside their native
range. The reasons for the accidental introduction and subsequent establishment of these aphids in new territories
remain obscure. In most cases the accidental introduction of these rather small and cryptic species are often linked to
human activities (such as international trade of plants and plant products) but other factors such as global warming
may aid in the dispersal of such organisms.
In the present work, the rapid colonization of Greenidea ficicola Takahashi, an aphid native to the Oriental
Region, in different regions of the world (Afrotropics, Nearctic, Neotropics and Southern Europe) is documented.peer-reviewe
Porqué Taradell dijo no: Estudio de viabilidad de un aeropuerto corporativo
El TFC realiza un estudio sobre la viabilidad de un aeropuerto corporativo en la población de Taradell, lugar en el que se habia planteado la construcción de una aeropuerto corporativo y que en un princio la población lo ha descartado. Esta analisis se realizará desde un punto de vista técnico, económico y también social
Actualización del mapa de vegetación del afloramiento ultramáfico de Sierra Bermeja (Málaga, España)
El objetivo de este trabajo consiste en actualizar el mapa de vegetación
del afloramiento ultramáfico de Sierra Bermeja (Málaga, España),
reduciendo a unidades básicas de vegetación los polígonos fotointerpretados
y deinidos de modo isionómico, para ser nominadas bajo aspectos itosociológicos,
que luego puedan ser transcritas a hábitats de la Directiva 92/43UE.
Se ha puesto especial énfasis en la diferenciación de los polígonos correspondientes
a la zonopotencialidad de Pinus pinaster versus Abies pinsapo. La
metodología utilizada se ha basado en el uso de SIG para fusionar polígonos
homogéneos utilizando para ello la tabla de atributos con el campo de deinición
de la vegetación de cada polígono. Se han identiicado 52 tipos de vegetación
con sus correspondientes áreas, destacando el tipo de matorral-jaguarzal
serpentinícola como el más abundante (56,4% del área total), mientras que los
bosques de Abies pinsapo se reducen a solo 53 Ha. Son destacables los matorrales
tipo jarales serpentinícolas (24,2% del areal total), por su relación con
el dinamismo post-fuego. Este tipo de datos junto con otros tipos de unidades,
incluidas zonas antropizadas, son de importancia para una ordenación y gestión
de un futuro parque nacional en la zona.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Proyecto I+D+i ULTRAFORESTS (CSO2013-47713-P): “Reconstrucción geohistórica de la vegetación arbórea sobre sustratos ultramáicos mediterráneos
Aphids associated with shrubs, herbaceous plants and crops in the Maltese Archipelago (Hemiptera, Aphidoidea)
A survey of the aphids associated with Maltese shrubs, herbaceous
plants and crops was carried out. Sixty six aphid species were recorded from more
than 90 species of host plants. Forty eight aphids were recorded from the Maltese
islands for the fi rst time bringing the total number of aphid species known from these
islands to 99. New records include: Acyrthosiphon lactucae, A. pisum, Anoecia
vagans, Aphis alienus, A. euphorbiae, A. hederae, A. lambersi, A. multifl orae,
A. nasturtii, A. parietariae, A. picridicola, A. ruborum, A. sedi, Aulacorthum
solani, Brachycaudus helichrysi, Capitophorus sp. nr. similis, Clypeoaphis
suaedae, Cryptomyzus korschelti, Dysaphis apiifolia, D. foeniculus, D. pyri, D.
tulipae, Hyadaphis coriandri, H. foeniculi, H. passerinii, Hyperomyzus lactucae,
Idiopterus nephrelepidis, Macrosiphoniella absinthii, M. artemisiae, M. sanborni,
Macrosiphum euphorbiae, Ma. rosae, Melanaphis donacis, Metopolophium
dirhodum, Pterochloroides persicae, Rectinasus buxtoni, Rhopalosiphum maidis,
R. padi, R. rufi abdominale, Schizaphis graminum, Semiaphis dauci, Sipha
maydis, Sitobion avenae, S. fragariae, Therioaphis alatina, Uroleucon inulae,
U. hypochoeridis and U. sonchi. Of these 99 aphid species, 58 are of economic
importance and 16 are alien introductions. For 15 of the aphid species, a total of 22
new host-plant records are made. Ten species of ants were found attending 18 aphid
species.peer-reviewe
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