Search results for "host"

Chemical analysis of residues left by walking adults of Nezara viridula which induce arrestment behavior in the egg parasitoid Trissolcus basalis.

2007

Chemical residues deposited by walking adults of the southern green stink bug (SGSB), Nezara viridula (L.) (Heteroptera: Pentatomidae), which play a role as contact kairomones inducing arrestment behavior in the egg parasitoid Trissolcus basalis (Wollaston), were investigated in laboratory experiments. Female wasps encountering an area contaminated by chemical residues from adult hosts showed an arrestment response characterized by prolonged periods of walking and turning, resulting in systematic return to the stimulus after encountering the treatment borders. When SGSB adults were dissected into separate body parts, extracts from legs and the dorsal laminar pronota of adult females elicite…

Climate change impact on extrinsic and intrinsic competition between egg parasitoids

2012

Climate changing is a real phenomenon and the last decade was the warmest decade ever. The impact of climate change on animal communities is complex, affecting species interactions in all trophic levels, in different ways and in different bio-geographic zones. Here we will discuss about the possible effects of climate changes in shaping the competition between egg parasitoid species to consume the same hosts. Egg parasitoids are important biological control agents due to their ability to kill the pest before the crop-feeding stages emerge. Competitive effects can be divided in “extrinsic competition”, the indirect interactions between adult females searching for hosts, and “intrinsic compet…

The essential oil compositions of three Sicilian accessions of Viscum album L. growing on three different host trees

2022

Viscum album L., (Common Mistletoe), is a hemiparasitic shrub that lives on a wide range of woody plant species, known since Neolithic period for its ritual and for pharmacological properties. Up to now, no investigation has been reported on the chemical composition of the essential oils of V. album aerial parts in relation with the diverse host trees. Consequently, the essential oils compositions of three Sicilian accession of V. album, growing on Quercus suber L., Crataegus monogyna Jacq. and Olea europaea L. var. europaea cv. 'Santagatese', respectively, were evaluated by GC-MS. The three populations showed quite different profiles indicating that the nature of the host considerably infl…

Response to Kruse-Plass et al. (2017) regarding the risk to non-target lepidopteran larvae exposed to pollen from one or more of three Bt maize event…

2017

We respond to the paper of Kruse-Plass et al. (Environ Sci Eur 29:12, 2017), published in this journal, regarding the risk to non-target lepidopteran larvae exposed to pollen from one or more of three Bt maize events (MON810, Bt11 and 1507). We emphasise that what is important for environmental risk assessment is not the number of pollen grains per se, but the degree of exposure of a NT lepidopteran larva to Bt protein contained in maize pollen. The main text of this response deals with general issues which Kruse-Plass et al. have failed to understand; more detailed refutations of each of their claims are given in Additional file 1. Valid environmental risk assessment requires direct measur…

Essential oils composition of Periploca laevigata Aiton subsp. angustifolia (Labill.) Markgraf (Apocynaceae – Periplocoideae)

2012

The essential oil of roots, branches, leaves, flowers and fruits of Periploca laevigata Aiton subsp. angustifolia (Apocynaceae) from Lampedusa Island has been obtained by hydrodistillation and its composition analysed. The analyses allowed the identification and quantification of 86 volatile compounds. Branches showed the higher diversity with 57 compounds followed by fruits with 33, roots with 23, flowers with 16 and leaves with six compounds, respectively. In the matrices examined three constituents, heneicosane, docosane and tricosane are in common, although with different percentages. At least the most abundant compounds found in the matrices have been reported to have several biologica…

Polarimetry as a useful tool for the study of binding equilibria between cyclodextrins and some suitably sized and structured organic molecules

Polarimetric study of binding equilibria between cyclodextrins and some suitable organic guests

Binding properties of polyaminocyclodextrin materials towards polyanions and p-nitroaniline derivatives

Museo dell'Università di Palermo, Complesso dello Steri, Palermo

2021

All'interno del complesso dello Steri, sede del Rettorato dell'Università di Palermo, si trova il Munipa, Museo dell'Università, che nasce con l'intento di raccontare l'Ateneo e il suo patrimonio. Il Museo si trova in uno dei corpi che ospitava i magazzini ottocenteschi della ex Dogana, sede, fino a poco tempo fa, dell'Archivio Storico di Ateneo. Il volume è articolato su due livelli, collegati da una scala in muratura, di cui il primo è coperto da una falda e il secondo da capriate lignee. Gli interventi di adeguamento alla funzione espositiva hanno tenuto conto di alcune preesistenze con le quali si sono confrontati. Lo spazio è, infatti, attraversato dagli archi trecenteschi che collegan…

L’Hosterium di Favara e il dominio territoriale dei Chiaramonte: politica dell’immagine e strategie edilizie di una dinastia di condottieri del medio…

2016

The Chiaramonte stand in the ranks of the many feudal lords of the island of the fourteenth century, even for a building activity that, in addition to the construction of churches and monasteries and massive fortifications and infrastructure over most of the region of Sicily, were on an extraordinary cycle of dwellings and the formulation of a “Chiaramontano style”, programmatically inspired by the Sicilian-Norman and Sveva royal tradition. Powerful family of noble warriors, wealthy owners of fiefs, great patrons and promoters of architectures, the Chiaramonte expressed a definite politica dell’immagine, even in competition with the recorded programs of the Aragonese dynasty of Sicily. In P…