Scolitidi e loro parassitoidi sfarfallati da piante esca di pino laricio e pino d'aleppo sull'Etna e sui monti Iblei

Virgilio Caleca, Matteo Maltese

Research output: Contribution to conferenceOtherpeer-review

Abstract

[automatically translated] In two different pine forests of Sicily where there have been recent attacks by bark beetles, in collaboration with the Forestry Authority, in late autumn 2008 and 2009, some plants have been cut down and left on the bed of fall, whole and Plant, until the following spring waiting for the colonization of bark beetles. In demesne Sparano (Noto, SR) to 620 m above sea level, on the Iblei mountains have been cut down bait plants of Pinus halepensis, while in two locations of the Etna Park, Silletta Pass (1200 m above sea level) and Second Mount (1600 m above sea level ), they have been torn down bait plants of Pinus larch. In May of the following year, stem parts of increasing diameter about 40 cm long and twigs with needles were collected, placed inside eclettori and kept at room temperature in a ventilated warehouse. In October next all sfarfallati insects were collected, and then identified. P. halepensis are sfarfallati about 9500 bark beetles belonging to four species listed in order of abundance: Pityogenes calcaratus, Orthotomicus erosus, Crypturgus numidicus and Tomicus destruens; the first species, very abundant in 2009 and almost absent in 2010, is sfarfallata aplenty from logs 4-9 cm in diameter. P. larch bark beetles are sfarfallati around 11100 (95% of which T. destruens) belonging to seven species: over the four previous ones Hylastes attenuatus (for the first time found in Sicily), H. linearis and Ips sexdentatus; the latter species, despite its widespread presence of Mount Etna, with this monitoring method only a few specimens were collected. The biggest difference between the flickering recorded by P. halepensis on Iblei and P. laricio Etna covered the parasitoids of bark beetles; while Mount Etna is sfarfallati only 8 specimens of 5 species of ichneumonoidei, on Iblei are sfarfallati about 1600 belonging to 4 species listed in order of abundance: Metacolus unifasciatus, pteromalide, Caenopachys caenopachoides and C. hartigii two hoverflies reported for the first once in Sicily and Roptrocerus xylophagorum, another pteromalide. Such a clear difference may be chargeable to climatic factors and the increased thickness of the P. larch bark, which would hinder the achievement of the larvae of bark beetles by parasitoids. laricio Etna covered the parasitoids of bark beetles; while Mount Etna is sfarfallati only 8 specimens of 5 species of ichneumonoidei, on Iblei are sfarfallati about 1600 belonging to 4 species listed in order of abundance: Metacolus unifasciatus, pteromalide, Caenopachys caenopachoides and C. hartigii two hoverflies reported for the first once in Sicily and Roptrocerus xylophagorum, another pteromalide. Such a clear difference may be chargeable to climatic factors and the increased thickness of the P. larch bark, which would hinder the achievement of the larvae of bark beetles by parasitoids. laricio Etna covered the parasitoids of bark beetles; while Mount Etna is sfarfallati only 8 specimens of 5 species of ichneumonoidei, on Iblei are sfarfallati about 1600 belonging to 4 species listed in order of abundance: Metacolus unifasciatus, pteromalide, Caenopachys caenopachoides and C. hartigii, two hoverflies reported for the first once in Sicily and Roptrocerus xylophagorum, another pteromalide. Such a clear difference may be chargeable to climatic factors and the increased thickness of the P. larch bark, which would hinder the achievement of the larvae of bark beetles by parasitoids. Metacolus unifasciatus, pteromalide, Caenopachys caenopachoides and C. hartigii two hoverflies repo
Original languageItalian
Number of pages133
Publication statusPublished - 2011

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