Search results for " Entomologia"
showing 10 items of 590 documents
Effects of essential oils of Origanum vulgare L. (Fam. Labiatee), Pelargonium odoratissimum L. (Fam. Geraniaceae) and Syzygium aromaticum L. (Fam. Mi…
2021
The cotton aphid, Aphis gossypii Glover (Homoptera: Aphidiidae), is a cosmopolitan and highly polyphagous species causing serious economic damage to numerous plants including Cucurbitaceae. The use of synthetic insecticides represent the main method of control of this aphid, often resulting in resistance to all the major insecticide group. The use of natural products, such as essential oils (EOs), has increased in recent years because they have advantages in reduction of this resistance. Within this research area, we have implement and evaluate the applications of EOs that aim at reinforcing knowledge on the control of this aphid. We investigated the topical application of the EOs of Origan…
IMPORTANZA DEGLI IMENOTTERI (INSECTA HYMENOPTERA) NELLA DIETA DEL GRUCCIONE, MEROPS APIASTER L. (AVES MEROPIDAE).
1997
Investigations on Tuta absoluta (Lepidoptera: Gelechiidae): larval infestation on the tomato cultivated in open field and evaluation of five essentia…
2019
Abstract The tomato miner Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is a Neotropical species, which cause serious damages to tomato in spread areas. It appeared in 2008 in Italy, where it seriously threatened tomato production both in greenhouse and open field cultivations. In this work a study on infestation by this leafminer on leaves was conducted in an organic cultivation of tomato (Lycopersicon esculentum Mill.) "Pizzutello" variety in Sicily (Italy), and the insecticidal activity of 5 essential oils (EOs) on T. absoluta was evaluated in laboratory. EOs of basil, cypress, laurel, peppermint and Spanish oregano were used against 3rd- and 4th-instar larvae to assess contact effect…
CONTRIBUTO DELLA FLORA SPONTANEA ALLA BIODIVERSITÀ: L’ESEMPIO DEGLI INSETTI FILLOMINATORI E DEI LORO PARASSITOIDI.
2002
Outcomes of intraguild interactions between two egg parasitoids in field and semi-field conditions
2012
Intraguild interactions between two egg parasitoids, Trissolcus basalis (Wollaston) and Ooencyrtus telenomicida (Vassiliev) exploring egg masses of the Southern Green Stink Bug Nezara viridula (L.) were investigated in field and semi-field conditions. Field trials were conducted in tomato fields by using sentinel and naturally laid egg masses in 2010 and 2011. Egg parasitoids monitoring, by sentinel egg masses placed weekly on plants during the tomato growing season and recollected one week later, showed that T. basalis occurs from June to October, whereas O. telenomicida occurs mainly in July and August. In the same fields, collections of naturally laid egg masses display different types o…
Primi reperti in Sicilia su diffusione e biologia di Leptoglossus occidentalis Heidemann (Hetroptera: Coreidae), cimice americana dei semi delle coni…
2009
In this paper the first data on the distribution and biology of L. occidentalis in Sicily are reported; this bug, belonging to the family Coreidae, originates from North America, where it is regarded as a serious pest of conifer seed orchards. The first Sicilian specimens of L. occidentalis were found in September 2002 near Gangi (PA), while the first collecting data published until now refer to November 2003 in Niscemi (CL). The coreid is distributed in all Sicily provinces (30 collecting sites), from the sea level to 1.430 m a.s.l. on the mountains; it was collected on cones and plants of Pinus halepensis Miller, P. laricio Poiret, P. pinea L., P. nigra J.F.Arnold and Pseudotsuga menziesi…
Rhagoletis cerasi (L.) in Western Sicily: presence, damages and control in cherry orchards.
2012
The research was carried out from 2006 to 2010 in 12 cherry orchards in Western Sicily, were Rhagoletis cerasi (L.), the cherry fly, represents a problem for medium late ripening cultivars. Presence and infestation of the dipteran were monitored on local cultivars and effectiveness of some products allowed in organic farming was tested compared with net bags. The presence of the cherry fly was recorded in all cherry orchards except in two recently planted and isolated. The infestation on fruits was not very high until the end of May. Pyrethrum and spinosad did not lower the infestation, on the contrary nets reduced it.
Indagini di laboratorio sui composti che inducono l'aggregazione delle neanidi di I età in Leptoglossus occidentalis (Hemiptera, Coreidae)
2011
Leptoglossus occidentalis è una cimice che si alimenta degli strobili e dei semi delle conifere appartenenti alla famiglia delle Pinaceae. Le neanidi di I età hanno un comportamento gregario che favorisce la sopravvivenza degli individui, in analogia a quanto visto in altre specie appartenenti allo stesso genere (Wheeler et al., 1990). L’individuazione dei composti semiochimici che influenzano questo comportamento potrebbe portare allo sviluppo di nuovi metodi di controllo di L. occidentalis. Le estrazioni (whole body) sono state realizzate su gruppi di 7-27 neanidi di I età per 30 minuti utilizzando un quantitativo di 40µl di esano o di acetone per neanide. Gli estratti sono stati biosaggi…
Valutazione dell’attività antagonista di Psyllaephagus bliteus Riek (Hym. Encyrtidae) e caratterizzazione molecolare delle popolazioni.
2016
L’attività di controllo operata da Psyllaephagus bliteus Riek, nei confronti dell’ospite specifico Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), la psilla dal follicolo bianco ceroso, è stata valutata in Campania attraverso il monitoraggio dei livelli di infestazione di Eucalyptus spp. e ponendo a confronto questi ultimi con dati raccolti prima della diffusione accidentale dell’Encirtide avvenuta in Campania nel 2012. I dati relativi al livello di infestazione della psilla, espressi come media del numero di psille non parassitizzate per foglia, rilevati durante il 2014-2015 sono stati posti a paragone con quelli rilevati nel 2011, e quindi in assenza di attività di controllo speci…