Search results for " Entomologia"
showing 10 items of 590 documents
Biological parameters of Neoseiulus longilaterus (Athias-Henriot) (Parasitiformes, Phytoseiidae) fed on prey and pollen in laboratory conditions
2019
Tetranychus urticae is the most important pest on different crops worldwide. Search for endemic phytoseiid mites co-occurring with the above pest, which might be good candidates as biocontrol agents, represents the policy followed by most scientists in recent years. The aim of the present work was to assess the various biological and demographic parameters of Neoseiulus longilaterus, associated with T. urticae on weeds, in laboratory conditions using the latter tetranychid and pollen of Oxalis pes-caprae as food. The results showed a better performance of the predator on the prey as regards the postembryonic development (7.63 and 8.18 days for prey and pollen respectively) and the demograph…
The design of artificial nestboxes for the study of secondary hole-nesting birds: A review of methodological inconsistencies and potential biases
2010
The widespread use of artificial nestboxes has led to significant advances in our knowledge of the ecology, behaviour and physiology of cavity nesting birds, especially small passerines. Nestboxes have made it easier to perform routine monitoring and experimental manipulation of eggs or nestlings, and also repeatedly to capture, identify and manipulate the parents. However, when comparing results across study sites the use of nestboxes may also introduce a potentially significant confounding variable in the form of differences in nestbox design amongst studies, such as their physical dimensions, placement height, and the way in which they are constructed and maintained. However, the use of …
Learning can be detrimental for a parasitic wasp
2021
Animals have evolved the capacity to learn, and the conventional view is that learning allows individuals to improve foraging decisions. The parasitoid Telenomus podisi has been shown to parasitize eggs of the exotic stink bug Halyomorpha halys at the same rate as eggs of its coevolved host, Podisus maculiventris, but the parasitoid cannot complete its development in the exotic species. We hypothesized that T. podisi learns to exploit cues from this non-coevolved species, thereby increasing unsuccessful parasitism rates. We conducted bioassays to compare the responses of naïve vs. experienced parasitoids on chemical footprints left by one of the two host species. Both naïve and experienced …
LA SISTEMATICA DEI PHYTOSEIIDAE: CENNI STORICI, SITUAZIONE ATTUALE E PROSPETTIVE DI SVILUPPO
2016
La sistematica della famiglia Phytoseiidae ha una lunga e controversa storia. Tra le cause principali di queste controversie possiamo ricordare le piccole dimensioni di questi acari e le conseguenti difficoltà di individuare caratteri morfologici universalmente validi da adoperare in una classificazione sistematica che rispecchi anche la filogenesi. Viene riportato in seguito un excursus storico della sistematica di questi piccoli predatori focalizzando l’attenzione alle due più importanti teorie di organizzazione dei taxa nell’ambito della famiglia che si sono delineate nel tempo e attualmente vengono adottate dai diversi sistematici. L’autore ha cercato di individuare i punti deboli di en…
Phytoseiid mites from the Basilicata region (Southern Italy): species diversity and redescription of Typhloseiulus arzakanicus (Arutunjan) with a key…
2017
A survey of phytoseiid mites was carried out in the Basilicata region (Southern Italy) between 1976 and 2014 on wild and cultivated plants. A total of 38 species belonging to eleven genera and two subgenera were found on 59 plant species. The most common species was Euseius finlandicus (Oudemans) (39%) followed by Typhlodromus (Typhlodromus) exhilaratus Ragusa (32.2%), Kampimodromus aberrans (Oudemans) (27.1%), Typhlodromus (Anthoseius) cryptus (Athias-Henriot) (23.7%). Typhloseiulus arzakanicus (Arutunjan), found for first time in Italy, is redescribed here, while the male of this species is described for the first time. A dichotomic key of the species belonging to the genus Typhloseiulus …
Ciclo biologico di Leptoglossus occidentalis ed effetti della diversa alimentazione sullo sviluppo degli stadi giovanili
2011
Leptoglossus occidentalis (Heteroptera: Coreidae), rinvenuto in Italia nel 1999, completa una sola generazione nel suo areale di origine nord-americano, mentre nel nostro paese gliene sono state attribuite da 2 a 3. Lo scopo del presente lavoro è quello di registrare la durata dei diversi stadi di sviluppo per individuare il numero di generazioni in differenti località della Sicilia e di analizzare gli effetti della diversa alimentazione sullo sviluppo degli stadi giovanili. Le prove sulla durata del ciclo biologico sono state condotte in laboratorio (22 °C ± 2, U.R. 80 %, 12:12), fornendo quale alimento pinoli, germogli e strobili di Pinus pinea L. Lo sgusciamento avviene in media dopo 11,…
Essential oils of Chiliadenus lopadusanus (Asteraceae).
2013
The essential oils from the leaves and flowers of Chiliadenus lopadusanus growing on Lampedusa Island were obtained by hydrodistillation and analyzed by GC-MS. The major component was camphor (39.4% in the leaves and 24.0% in the flowers), followed in the leaves by torreyol (6.7%), t-cadinol (5.2%) and 1,8-cineole (3.8%), while in the flowers by t-cadinol (15.2%), t-muurolol (5.1%) and torreyol (4.5%). Among the compounds identified, several seem to play a role in antibacterial, antifungal, allelopathic and spasmolytic activity. In addition, several compounds identified in this study seem to influence the attraction of Megachile (Eutricharaea) apicalis (Megachilidae) and Halictus (Seladonia…
La cattura massale degli adulti del Punteruolo rosso nel comune di Marsala
2009
Association of entomopathogenic fungi with exotic red palm weevil in treated and untreated Phoenix canariensis
2011
Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae) is introduced pests of established Phoenix canariensis in Sicily (Italy). A three-year field survey of R. ferrugineus generated data on species of fungal associated with larval, pupae, and adult R. ferrugineus recovered from several cadavers. Moreover specimens were collected from infested Phoenix canariensis in scattered locales in Sicily to determine also infection rates with entomopathogenic fungi over 3 years. Collection was done after overwintering period, during summer and at the beginning of autumn in palm, untreated and treated with chemical pesticides. As can be expected the highest infestation was recorded after overw…