Search results for "Olive"

Contenimento naturale di Bactrocera oleae (Rossi): clima o parassitoidi? Confronto tra Western Cape (Sud Africa) e Sicilia

2017

Bactrocera oleae (Rossi), mosca delle olive, è presente anche in Sud Africa, ma finora non si sono avute notizie di infestazioni economicamente rilevanti negli oliveti. L’accertata presenza di un maggior numero di braconidi parassitoidi della mosca delle olive rispetto alle aree mediterranee è stata ed è considerata da molti autori la principale causa di queste minori infestazioni, senza che però siano stati eseguiti in Sud Africa adeguati studi sulle infestazioni da B. oleae e sui fattori cli- matici delle aree interessate. Analizzando recenti dati sui livelli d’infestazione di B. oleae registrati su olivo coltivato e selvatico nel Western Cape e in Sicilia, appaiono simili in una norm…

FACTORS AFFECTING THE INFESTATION DUE TO BACTROCERA OLEAE (ROSSI) IN SEVERAL SICILIAN OLIVE CULTIVARS

2010

Strategie di controllo di Bactrocera oleae (Rossi) nell’olivicoltura biologica da olio e da tavola.

2010

I buoni risultati ottenuti nell’olivicoltura biologica da olio sono legati alla raccolta anticipata che limita le infestazioni tardive di Bactrocera oleae (Rossi) e gli effetti negativi delle infestazioni in atto. Molto utilizzate per il controllo della mosca sono le catture massali. L’infestazione dannosa registrata nei due mesi precedenti la raccolta risulta strettamente correlata alla qualità dell’olio, mentre non lo è l’infestazione totale alla raccolta. Gli insetticidi consentiti nell’olivicoltura biologica sono molto poco utilizzati. Nelle situazioni di forte pressione della mosca soltanto i trattamenti con argille e prodotti del rame riescono a mantenere bassi i livelli d’infestazion…

Effectiveness of mass trapping by bottle traps baited with salt sardines to control Bactrocera oleae (Gmelin)

2007

Various substances are known as attractants of tephritid flies; the putrescine and other compounds coming from animal decay have been positively tested for attraction of Bactrocera cucurbitae (Coquillett) and other tephritids. In Sicilian coastal areas, usually heavily infested by Bactrocera oleae (Gmelin), few organic farmers producing high quality olive oil apply mass trapping by using bottle traps baited with salt sardines. The aim of this paper is to test the effectiveness of this kind of mass trapping to control the olive fruit fly. In 2005 and 2006 mass trapping was tested in an organic olive grove (Cerasuola cultivar) located in Trapani. In 2005 two plots were delineated: 189 untreat…

MOLECULAR ANALYSIS OF COLLETOTRICHUM SPECIES ASSOCIATED TO OLIVE IN CALABRIA.

2013

A new molecular approach based on the use of genus-specific primers targeting the internal transcribed spacer (ITS) regions of rDNA, was developed and used to study the diversity of Colletotrichum species associated with the olive canopy in the Gioia Tauro plain (Calabria, southern Italy). Representative symptomatic and symptomless samples of leaves, flowers and fruits were collected during 2012 and analyzed by extracting total DNA and amplifying the target region with the genus-specific primers. Amplicons were cloned and sequenced in order to use the ITS as a barcode gene. No Colletotrichum species were detected in the first sampling period (May 28, 2012), whereas around 15% of the analyze…

FIRST REPORT OF STEMPHYLIUM sp. ON OLIVE TREES IN SICILY.

2011

In the last five years, we have observed a new decline of Olea europaea in north-western and southern Sicily (insular Italy). The syndrome consists in more or less extensive leaf chlorosis, sometimes with irregular necrotic marginal or apical spots. Apical defoliation of twigs showing cortical necrosis and withering has often been observed. Isolations, carried out in 2007/08, yilded a complex of fungal genera associated with the syndrome. Among these, Stemphylium sp., a well-known foliar pathogen of other plants, was constantly isolated from all the alterations observed. In December 2010, single spore colonies of this fungus were used for artificial inoculations on healthy 3-year-old olive …

Root and crown tot of olive caused dy Phytophthora spp.

2011

Phytophthora root and crown rot has been traditionally considered a minor disease of olive. However, in recent years it has been recognized as an emerging problem in several olive-growing countries such as Australia, Italy and Spain probably as a consequence of the expansion of plantings in new areas with heavy soils and the more intensive use of irrigation in both olive nurseries and commercial groves. The disease has been reported from most olive-growing countries and is caused by several soil -borne species of Phytophthora, including P. cinnamomi, P. citricola, P. cryptogea, P. drechsleri, P. gonapodyides, P. inundata, P. megasperma,P. nicotianae and P.palmivora. Diagnosis is currently b…

Fatty acids, sterols and antioxidant compounds of minor and neglected cultivar of Sicilian virgin olive oils

2007

Acidic and sterol composition, pigment fraction and antioxidant compounds (tocopherols, total phenols and polar phenols) from eight monovarietal Sicilian olive oil samples, analyzed during the crop seasons from 2003/2004 to 2005/2006, are reported. Cultivars were divided, according to their diffusion, in main, minor and neglected cultivars. Encouraging data were observed for minor and neglected cultivars, for some revaluation in regard to their relevance, because they showed the highest content in tocopherols, in total phenols and polar phenols compared with main cultivars.

HPLC PROFILE AND EVOLUTION DURING STORAGE OF TRIGLYCERIDES AND DIGLYCERIDES IN VIRGIN OLIVE OILS

2007

Acidic and sterol composition, pigment fraction and antioxidant compounds (tocopherols, total phenols and polar phenols) from eight monovarietal Sicilian olive oil samples, analyzed during the crop seasons from 2003/2004 to 2005/2006, are reported. Cultivars were divided, according to their diffusion, in main, minor and neglected cultivars. Encouraging data were observed for minor and neglected cultivars, for some revaluation in regard to their relevance, because they showed the highest content in tocopherols, in total phenols and polar phenols compared with main cultivars.

Aspetti sulla qualità microbiologica delle olive da mensa commercializzate sfuse

2003

Il consumo delle olive da mensa in questi ultimi anni è notevolmente aumentato. Lo scopo del lavoro è stato quello di andare ad investigare la qualità microbiologica e la sicurezza d uso di olive.