Search results for " Entomologia"

Grapevine pests in Sicily.

2008

More than twenty phytophagous species are reported associated with Sicilian vineyards. Only a quarter of them have to be considered of economic importance. Among moths, the grapevine moth Lobesia botrana (Denis & Schiffermüller) is certainly the most frequent species. It is considered the key pest on both table and wine grapes, while the incidence of the grape berry moth Eupoecilia ambiguella (Hübner) is scarce and linked to particular biotopes. Three to four flights are reported for the grapevine moth from February-March to October-November, while no data are available for the grape berry moth. Damages caused by L. botrana are strictly linked to the climatic trends during the summer period…

First records on Thripobius semiluteus Boocek (Hymenoptera:Eulophida) in Sicily.

2001

Ecological infrastructures in a vineyard of West Sicily

2008

Monitoraggio e controllo di insetti infestanti le collezioni dell’erbario dell’orto botanico di Palermo

2021

Gli erbari sono strumenti d’importante rilevanza scientifica che conservano esempi di piante rare, endemiche o estinte, e assumono essi stessi notevole interesse come beni culturali per il loro valore storico ed estetico. Gli erbari possono essere soggetti all’attacco di diverse specie d’insetti che danneggiano le piante essiccate (exsiccata) con la loro attività di alimentazione. Il controllo di queste infestazioni è spesso aggravato dalla difficoltà di poter mettere in atto trattamenti insetticidi. In tale contesto è opportuno adoperare adeguati strumenti di monitoraggio e controllo basati su sostanze attrattive feromonali o alimentari per una corretta gestione integrata degli erbari.…

Host specificity in the egg parasitoid Telenomus busseolae is mediated by sex pheromone compounds

2007

Several studies showed that egg parasitoids are able to detect host sex pheromones produced by adult hosts as a host cue. In this way female wasps are directed toward an area where host mating is in progress and where an oviposition has probably taken place or is soon to occur. Telenomus busseolae Gahan (Hymenoptera: Scelionidae) is a solitary egg parasitoid of various noctuids (Lepidoptera, Noctuidae) belonging to the genera Sesamia. In field observations, it has been demonstrated that T. busseolae reacts to the pheromone emitted by females of the corn stalk borer, Sesamia nonagrioides (Lefebvre) and the pink stem borer, Sesamia calamistis (Hampson). It is known that the sex pheromone prod…

Influence of a humid zone on entomocoenosis diversity.

2017

The authors studied the insect diversity associated to humid and dry zones in the Caselli Nature Reserve (Pisa, Tuscany) in 2016 by using two Malaise traps. The average number of species and individual captures increased in the humid zone to about 118% for species and to 152% for individuals respectively. This richness increase was observed for some families of Coleoptera and Hymenoptera Aculeata and Apoidea. Surprisingly, a richness decrease of Lepidoptera (to 89% and 66% respectively for species and individuals) and Orthoptera (to 44% and 21% respectively for species and individuals) in the humid zone has been observed.

I MACROINVERTEBRATI COME INDICATORI ECOLOGICI NEL MAPPAGGIO DI QUALITÀ DEL FIUME ANAPO (SIRACUSA, SICILIA).

1992

The gut bacterial community of the red palm weevil Rhynchophorus ferrugineus (Olivier, Coleoptera, Curculionidae) larvae

2011

The red palm weevil (RPW), Rhynchophorus ferrugineus (Olivier, Coleoptera, Curculionidae) is the major pest of palm trees in the Mediterranean area. Damages are caused mainly by the endophytophagous larvae that consume the palm tender soft tissues making galleries and producing a wet “frass” with a characteristic fermented odour. The culturable bacterial community associated to the frass produced by RPW larvae inside Phoenix canariensis trees is mainly composed of facultative anaerobe gamma-proteobacteria that have their closest phylogenetic relatives in the gut microbiome of other endophytophagous and xilophagous coleopteran as bark beetles and other plant biomass-degrading insects (leaf-c…

PIANTE AROMATICHE E MEDICINALI: L’ ENTOMOCENOSI DEL CAPPERO IN SICILIA

2005

Guilds of herbivore insects of medicinal and aromatic plants are generally composed by poliphagous insects that only occasionally are present at high infestation levels. In this paper the main insect pests observed on Capper spinosa (L.) in Sicily are described. The key pests of this crop are Capparimyia savastani (Martelli) – (Diptera: Tephritidae), Asphondylia gennadii (Marchal) (Diptera: Cecidomyiidae), and, the painted bug Bagrada hilaris (Burmeister) (Heteroptera: Pentatomidae). Infestations of other insect pests are also occasionally recorded as the case of the southern green stink bug, Nezara viridula (L.) (Heteroptera: Pentatomidae), in the island of Ustica; the cabbage butterfly, P…

On two Italian Gall Midges (Diptera Cecidomyiidae) and their parasitoids

2016

Some biological data on Cystiphora sonchi (Bremi) and Asphondylia trabuti Marchal in Italy are reported. C. sonchi, previously known only for N Italy, is also recorded for S Italy, Sardinia and Sicily. It induces galls on the leaves of Sonchus spp. (Compositae) all the year around, except for the second half of July and August. The number of galls per leaf was higher in summer (11.6) than in winter (7.4). Overall 5-6 generations per year were observed, with a maximum number of individuals in spring-summer. Larvae often merge in the same gall, pupating inside it and emerging from the lower leaf surface; in winter they can leave galls and pupate outside them. On the whole 426 C. sonchi and 38…