A survey in natural olive resources exposed to high inoculum pressure indicates the presence of traits of resistance to in Leccino offspring.

Introduction: The epidemic spread of the harmful bacterium causing the "olive quick decline syndrome", decimating olive trees in southern Italy, in the region of Apulia, prompted investigations to search for olive genotypes harbouring traits of resistance.

Methods: A prospecting survey was carried out to identify, in the heavily infected area of Apulia, olive genotypes bearing resistance. Given the limited genetic diversity in the commercial olive groves with few cultivars widely cultivated, surveys targeted predominantly spontaneous olive genotypes in natural and uncultivated areas.

Update of the spp. host plant database - Systematic literature search up to 31 December 2023.

This scientific report provides an update of the spp. host plant database, aiming to provide information and scientific support to risk assessors, risk managers and researchers dealing with spp. Upon a mandate of the European Commission, EFSA created and regularly updates a database of host plant species of spp.

Aromatic Profiling of New Table Grape Varieties Using Gas Chromatography/Mass Spectrometry and Olfactometry.

The aim of this study is the aromatic characterization of new table grape varieties, namely Guzun (), Melona (), Cotton Candy (), IVC SA3 (), and IVC SB1 (). The qualitative and quantitative analysis of odorant molecules present in the berries allows for the definition of the aroma profile of the grape. This analysis benefits from the progress of analytical techniques and sensory methodologies.

Breeding new seedless table grapevines for a more sustainable viticulture in Mediterranean climate.

The growing demand for sustainable and environmentally friendly viticulture is leading to a multiplication of breeding programs aimed at obtaining vines that are resistant to powdery mildew (PM) and downy mildew (DM), the two most damaging vine diseases. In Puglia, the most important Italian region for the production of table grapes, an extensive crossing program was launched in 2015 with 113 crosses, including elite table varieties, seedless varieties, and resistant varieties. The main seedling production parameters were measured for each cross.

Biology and Ultrastructural Characterization of Grapevine Badnavirus 1 and Grapevine Virus G.

The biological characteristics of grapevine viruses, such as their transmission and host range, are important for the adoption of successful prophylaxis strategies. The aim of this study was to investigate the traits of two newly described grapevine viruses widely distributed in Croatia, grapevine badnavirus 1 (GBV-1) and grapevine virus G (GVG). The vine mealybug () proved to be a vector of GBV-1 and GVG capable of vine-to-vine transmission with overall experimental transmission rates of 61% and 14.

Detection and molecular characterization of a Grapevine Roditis leaf discoloration-associated virus (GRLDaV) variant in an autochthonous grape from Apulia (Italy).

The complete nucleotide sequence and genome organization of a new Badnavirus isolated from the autochthonous grapevine variety "Bombino nero" from Apulia (Italy) was determined. The genome of this virus consists of 7097 nt and has four open reading frames (ORFs). Analysis of putative proteins encoded by each ORF revealed greatest sequence similarity to Grapevine Roditis leaf discoloration-associated virus w4 (GRLDaV; NC_027131).

A new grapevine virus discovered by deep sequencing of virus- and viroid-derived small RNAs in Cv Pinot gris.

Field symptoms of chlorotic mottling and leaf deformations were observed on the cv Pinot gris (PG) in the Trentino region (Italy). Extensive assays excluded the presence of widely distributed nepo-, ampelo- and vitiviruses. An analysis of small RNA populations from two PG grapevines showing or not symptoms was carried out by Illumina high throughput sequencing.