Search results for " Entomologia"
showing 10 items of 590 documents
Predation of Typhlodromus longilaterus Athias-Henriot (Parasitiformes, Phytoseiidae) females on eggs and juveniles of the tetranychid mites Tetranych…
2013
Typhlodromus longilaterus is a generalist phytoseiid mite described by Athias-Henriot in 1957 and commonly found in Israel on spontaneous herbaceous plants. As very little is known about this species, the present study reports preliminary results on the predation capacity of phytoseiid females on eggs and juveniles of two tetranychid mites very common in the Mediterranean area, Tetranychus urticae and Panonychus citri. After 24 hours the phytoseiid females preyed on 15% of offered eggs of both tetranychids, while the prey ratio was higher on T. urticae eggs after this period (33.4% and 33.5% vs 20.8% and 16.2% after 2 and 3 days for T. urticae and P. citri respectively). The phytoseiid show…
Impiego di tecniche elettroantennografiche per lo studio dei composti semiochimici attivi nei confronti del Punteruolo rosso delle palme.
2009
Organismi geneticamente modificati (OGM): quali rischi per la biodiversità zoologica?
2010
Diversi OGM possono potenzialmente entrare nel mercato e in generale nell’ambiente italiano. In particolare i candidati più prossimi sono le piante geneticamente modificate (PGM) tolleranti agli erbicidi e resistenti agli insetti, ma sono in corso di valutazione anche insetti e pesci transgenici per i quali l’Autorita’ Europea per la Sicurezza Alimentare (EFSA) ha già dato mandato per una revisione scientifica dello stato dell’arte e per lo studio della valutazione del rischio (EFSA, 2008 e 2009). Accanto ai benefici dello sviluppo di questi organismi è importante ricordare alcuni rischi ambientali collegati proprio al loro sviluppo: trasmissione del gene modificato ad altre piante attraver…
The Plant as a Habitat for Entomophagous Insects
2016
Populations of herbivorous insects are naturally consumed by other predacious or predatory insect species. These entomophagous insects are thus plant-dwelling organisms that use the plant for several vital functions and are affected by plant traits at the evolutionary, organism and population levels. Many entomophagous species are used for the biological control of insect pests worldwide. The aim of this chapter is to provide an exhaustive review of mechanisms underlying the interactions between plants and entomophagous insects, including those governing life history traits at the individual level, as well as those acting on population and community structure and dynamics. We detail how pro…
Integrated Protection in Viticulture
2008
Single sensillum responses in Trissolcus basalis females to companion plant volatiles
2016
In food resources location and selection, parasitoid females spend considerable time examining the substrate with their antennae, where chemosensory, mechanosensory and thermo-hygroreceptive sensilla exist. Olfaction and perception of plant volatiles play a basic role in recognition of nutritional resources. For Trissolcus basalis, an egg parasitoid of the green stink bug Nezara viridula, previous electroantennography and behavioural experiments tested the parasitoid’s response to extracted headspace volatiles and a synthetic blend of buckwheat volatiles indicated that T. basalis females have sensitive and selective olfactory responses some major buckwheat, Fagopyrum esculentum, flower vola…
Semiochemical exploitation by two egg parasitoids,Trissolcus basalis and Trissolcus brochymenae (Hymenoptera: Scelionidae)
Chemo-orientation in egg parasitoids, a self-controlled movement in time and space, is led by volatile or substrate-borne chemicals distribution in the environment for purposes of locating host, food, mates and other resources. The perception of these chemical stimuli can be either from a distance by exploiting long-range infochemicals in the case of volatile chemoreception and/or upon contact with the cues when wasps are relatively close to the host in the case of contact chemo-reception by perceiving short-range infochemicals. In the present thesis, two different examples of chemo-orientation were treated. The first is an olfactory chemo-reception concerning Trissolcus basalis (Wollaston)…
L’ARTROPODOFAUNA ASSOCIATA A PARIETARIA SPP. (URTICACEAE) – 2° NOTA – APHIS PARIETARIAE THEOBALD (HOMOPTERA APHIDIDAE) OSPITE NATURALE INDIFFERENTE D…
1997
Valutazione del metodo “attract and kill” con eco-trap nel controllo della mosca delle olive Bactrocera oleae Gmelin.
2009
Il lavoro è stato svolto in quattro aziende a conduzione biologica della Sicilia occidentale avvalendosi delle risorse finanziarie istituite dal MiPAF, con il “Fondo per lo sviluppo dell’agricoltura biologica e di qualità” ed in ambito regionale dall’attuazione da parte del Servizio IV dell’Assessorato Regionale Agricoltura e Foreste del “Progetto di Sviluppo dell’Agricoltura biologica in Sicilia” sottoprogetto “Gestione fitosanitaria dell’agrosistema olivo”. Vengono riportati i dati inerenti l’efficacia del metodo “attract and kill” nei confronti delle infestazioni della mosca delle olive. In ciascuna delle quattro aziende, tre situate in zone collinari (indicate con A, B e C) e una a live…