Search results for "olive"

Improvement in yield and fruit size and quality of the main Italian table olive cultivar 'Nocellara del Belice'

2014

Olive (Olea europaea L.) shows alternate bearing, with unreliable cropping patterns and inconsistent fruit size and quality every year. In many countries, thinning with naphthaleneacetic acid (NAA) is used to minimise alternate bearing behavior in olives. However, in Italy, growers are reluctant to employ this practice and no detailed knowledge is available for specific cultivars. We evaluated the effects of spraying NAA on various dates on the productive and vegetative characteristics of the main Italian table olive cultivar'Nocellara del Belice'. Trunk cross-sectional area, fruit set, fruit drop, fruit size, pit size, yield per tree, crop density and flesh to pit ratio were analysed. The …

Application of Precision Agriculture for the Sustainable Management of Fertilization in Olive Groves

2023

Olive tree growing (Olea europaea L.) has considerably increased in the last decades, as has the consumption of extra virgin olive oil in the world. Precision agriculture is increasingly being applied in olive orchards as a new method to manage agronomic variability with the aim of providing individual plants with the right input amount, limiting waste or excess. The objective of this study was to develop a methodology on a GIS platform using GEOBIA algorithms in order to build prescription maps for variable rate (VRT) nitrogen fertilizers application in an olive orchard. The fertilization plan was determined for each tree by applying its own nitrogen balance, taking into account the variab…

El ciclo económico y la morosidad

2016

Basado en las variables utilizadas por el informe de Oliver Wyman, modificando y eliminado las redundantes, se elabora un modelo econométrico para estimar la morosidad de las entidades de crédito españolas. Las variables son el PIB, el deflactor, el desempleo, la bolsa, los créditos, el Euribor, el precio de las viviendas el tipo de cambio y na variable ficticia para que representa el SAREB. Además se contrasta si el modelo es óptimo para para largos periodos de tiempo. Los resultados obtenidos evidencian que el modelo construido con datos provenientes de épocas de recesión no es válido para épocas de crecimiento.

Effect of the mechanical harvest of drupes on the quality characteristics of green fermented table olives

2015

Background: Because of damage caused by mechanical harvesting, the drupes for table olive production are traditionally hand harvested. Until now, no data have been available on the microbiological and chemical features of mechanically harvested drupes during fermentation. Results: Drupes mechanically harvested and inoculated with Lactobacillus pentosus OM13 were characterized by the lowest concentrations of potential spoilage microorganisms. On the other hand, drupes mechanically harvested and subjected to spontaneous fermentation showed the highest concentration of Enterobacteriaceae and pseudomonads during transformation. The lowest decrease of pH (4.20) was registered for the trials inoc…

Nutritional quality of extra virgin olive oils from two different Olea Europea cultivars: application of a functional matematic index

2013

P76 - NUTRITIONAL QUALITY OF EXTRA VIRGIN OLIVE OILS FROM TWO DIFFERENT OLEA EUROPEA CULTIVARS: APPLICATION OF A FUNCTIONAL MATEMATIC INDEX D.Di Majo1, E. Finotti2, M. La Guardia3, M. L. Picone4, S. Palumbo1, M. Giammanco1, S. Giuliano4 1 Unità Didattico Scientifica di Fisiologia e Farmacologia, Dip.DIGSPO, Università di Palermo; 2 CRA-NUT, Centro di Ricerca per gli Alimenti e la Nutrizione, Roma; 3 Dip. STEBICEF, Università di Palermo; 4 Agenzia delle Dogane, Laboratorio Chimico, Palermo Corresponding author: Danila Di Majo, Unità Didattico Scientifica di Fisiologia e Farmacologia, Dip. DIGSPO, e-mail. danila.dimajo@unipa.it, phone +390916236405 Background The extra virgin olive oil is ver…

DINAMICA DEI FLUSSI EVAPOTRASPIRATIVI IN SISTEMI ARBOREI ETEROGENEI

2011

Growth and physiological responses of young olive trees affected by Olive leaf yellowing associated virus

2017

We studied the effect of Olive leaf yellowing associated virus (OLYaV) on biometric and physiological changes in olive. The trial was carried out on 32 two-yearold virus-free trees of 'Frantoio' grafted on virus-free olive seedlings and grown in 32-L pots. Half of the trees were inoculated with OLYaV in the fall of 2007. At 6, 18, and 24 months after inoculation, tree height, basal trunk diameter and total leaf number were determined, and leaf area tree-1 was estimated from a 50-leaf subsample. Twigs of various order were also counted and measured. At the end of the experiment, dry matter partitioning, leaf gas exchange and water potential were also measured. Total twig length and number, t…

Microbiological and safety evaluation of green table olives marketed in Italy

2011

The microbiological and safety conditions of green table olives sold on the Italian market were evaluated on 40 samples, 20 loose and 20 packed in containers, purchased at street markets and supermarkets. The olives were analyzed for microflora and food safety indices, and for aflatoxin B1 and ochratoxin A occurrence, and the results showed acceptable security. There was wide heterogeneity in the microflora, the numerical values being in relation to the olive type. The microbial population was dominated by the yeasts and lactic bacteria responsible for the fermentation process, and their numbers, together with the metabolic activity, led to conditions unfavorable for the development of path…

IL RUOLO DELL’OLEASTRO INVEGES DI SCIACCA NELLA DEFINIZIONE DEL PAESAGGIO FORESTALE STORICO DELLA SICILIA

2016

L’oleastro, Olea europaea var. sylvestris (Mill.) Lehr, è uno delle componenti rappresentative della vegetazione mediterranea. Specie considerata caratteristica della macchia (Oleo-Ceratonion siliquae Br.-Bl. ex Guinoch. e Drouin. 1944) si accompagna con altre sclerofille e specie caducifoglie estive con le quali forma aspetti di vegetazione alto arbustiva o arborescente. Ma l’oleastro in Sicilia è anche un elemento di boschi termofili, di territori che presentano una certa xericità ambientale, potenzialmente diffusi in un’ampia fascia altimetrica che si estende dalla costa fino a 800-1000 m di quota. In tale contesto, l’oleastro si accompagna con querce caducifoglie termofile, quali Quercu…

Wild olive seed weevil in South Africa, Anchonocranus oleae Marshall (Coleoptera Curculionidae), a rediscovery after a century

2019

The wild olive seed weevil, Anchonocranus oleae Marshall, 1912 was not found after its description and the study of its biology by Silvestri in 1915. Recently, A. oleae larvae were found alive inside the kernels of wild olives (O. europaea subsp. cuspidata) collected from trees between 2009 and 2012 in the Western Cape, South Africa. No weevil larvae were found in cultivated olives collected during the same period. Only two adult weevils emerged from olives collected on the tree and on the ground. Over the sampling period 20 adults were collected directly on wild olive trees at different sites in the Western Cape and one in the Eastern Cape. All adults were shown to be conspecific with the …