Accueil > Revue De Presse > L’Europe, l’Afrique, le Monde > Témoignages étrangers > Italie : clair, préoccupant, formateur .....

Italie : clair, préoccupant, formateur .....

samedi 26 septembre 2015 - Rédaction SNP

The impact of introduced exotic insect plant pests

 on Italian urban forest trees

 

Autore : Santi Longo - GEORGOFILI WORLD
Pubblicato il : 21-09-2015
image_pdfimage_print Paesaggio boscoso presso Perugia, Giovanni Costa detto Nino


More than 500 insect pests in the Italian ecosystems are considered to be exotic (DISIE, 2008). About 200 of these species have been introduced and have established themselves in Italy since 1970. The intensification of plant trade between Italy and geographically distant commercial partners is considered to be one of the main causes of these introductions. Climatic abnormalities have also favored the spread and acclimation of these exotic organisms. Climatic change influences directly the establishment of poikilothermic insects by favoring the survival of a great number of introduced individuals or indirectly through the alterations induced in host phenology.
Urban forest trees particularly affected by these exotic insects in northern and central Italy include alder, beech, birch, hornbeam, maple and sycamore trees. These landscape trees have been severely damaged by Cerambicydae Anoplophora chinensis Forster and A. glabripennis (Motshulsky).
The devastating impact of the introduction of the curculionid Rhynchophorus ferrugineus (Olivier) on landscape palms is well known. Canary palms [Phoenix canariensis (Hortorum ex Chabaud)] are one of the preferred hosts of this insect, native to Asia. From 2004 to 2009, more than 30,000 Canary palms have been killed by this insect in Abruzzo, Apulia, Campania, Latium, Liguria, Marches, Sardinia and Sicily.
Other introduced species such as the Metcalfa pruinosa (Say) (Rhynchota Flatidae), Corytuca ciliata (Say) and C. arcuata (Say) (Rhynchota Tingidae), Phenacoccus madeirensis Green (Rhynchota Pseudococcidae), Ceroplastes japonicus Green and Protopulvinaria piriformis (Cock.) (Rhynchota Coccidae), Cameraria ohridella Descka & Dimic (Lepidoptera Gracillariidae), Paysandisia archon (Burmeister) (Lepidoptera Castniidae), Megaplatypus mutatus (Chapuis) (Coleoptera Platypodidae), Xylosandrus crassiusculus (Motschulsky) and X. germanus (Blandford) (Coleoptera Scolytidae), Callidiellum rufipenne (Motschulsky), Phoracanta semipunctata Fabricius, and P. recurva Newmann (Coleoptera Cerambycidae) are severely damaging ornamental trees in localized areas. The introductions of these exotic forest insect pests into Italian forests can be prevented by implementing rigorous coordinated surveys by the member countries and inspections at the port of entry to each country in the organization. By setting up monitoring networks to promptly detect the introduction and by delimiting the areas affected by these newly introduced pests, it is possible to contain the infestations in Italian forest ecosystems.
Once new exotic insect pests are introduced, integrated management including appropriate forestry management practices, biological control methods and trapping are recommended, whenever applicable, to limit the devastating effects induced by these harmful exotic forest insects.

Excellente synthèse de la situation en Italie par contre sur un possible contrôle des importations dans les port l’auteur semble avoir chaussé ses "lunettes roses".

Derniers articles

9 décembre, par Rédaction SNP

Les délices du réglementaire......

Les jardiniers amateurs à la diète : A l’exception des produits de biocontrôle, à faible risque ou dont l’usage est autorisé en agriculture biologique, tous les produits de la gamme amateur seront réservés à partir du 1er (...)

7 décembre, par Rédaction SNP

M2 I BIOCONTROL .....La licorne

Pour que la licorne ne soit plus un mythe, il faut que le bio-contrôle attire vers lui des investisseurs privés à la recherche de placements surs, vertueux, rentables...
Très intéressant article du Nouvel Economiste qui (...)

Edito

Edito d’octobre 2018

12 novembre, par Rédaction SNP

Chers amis et passionnés du palmier,
Sans l’avoir voulu nous sommes récompensés d’avoir un peu tardé dans la sortie de cet édito. Les 15 grands élus que nous avions solennellement saisi de graves difficultés consécutives à la suppression du Confidor et à l’abandon européen de la lutte obligatoire contre le CRP semblaient totalement insensibles à notre cause.
Sauf un, le Maire de Menton : (...)