The increasing level of hazardous residues in the environment and food chains has led the European Union to restrict the use of chemical fungicides. Thus, exploiting new natural antagonistic microorganisms against fungal diseases could serve the agricultural production to reduce pre- and post-harvest losses, to boost safer practices for workers and to protect the consumers' health. The main aim...

In order to evaluate the potential aroma of some Portuguese grapes, several glycosidically bound aroma compounds of ten grape varieties grown in Évora, Alentejo, Portugal, were released, identified and quantified using gas chromatography–mass spectrophotometry. White varieties were Arinto, Perrum, Rabo-de-Ovelha, Roupeiro and Antão Vaz. Red varieties were Trincadeira, Aragonez, Tinta Caiada, Mo...

BACKGROUND The potential of systemic neonicotinoid insecticides to control potato leafhopper, Empoasca fabae (Harris), a damaging pest of wine grapes in the eastern United States, was investigated. Soil or foliar applications were made to potted or field-grown vines, and the response of leafhoppers was determined in clip cages over the following month on young or mature leaves. RESULTS Foliar...

Under the global warming scenario, water scarcity is expected to intensify in most grape-growing regions. The use of drought-tolerant rootstocks considered a useful tool mitigate negative effects soil deficit on vine functioning. Differences leaf gas exchange, plant status, specific hydraulic conductivity petioles (Kpetiole), xylem vessel size and vegetative vigour field-grown Pinot noir grafte...

The preservation of the old vine heritage, combined with fact that vines could present greater resistance to biotic and abiotic factors, has led an increase in research studies about contribution age on grape wine quality. Thus, main goal this work was evaluate potential influence grapevine several general physicochemical phenolic parameters during maturation a Rabigato white variety. Therefore...

Susceptibility to diseases of economically important grapes is critical the evaluation germplasm recommended for commercial production and development sustainable systems. In 2018–2019, cold-hardy grape cultivars including ‘Brianna’, ‘Crimson Pearl’, ‘Itasca’, ‘Louise Swenson’, ‘Marechal Foch’, ‘Marquette’ ‘Petite ‘St. Pepin’, ‘Verona’ were evaluated on non-treated vines susceptibility downy mi...

Critical levels (CL) of available potassium (K) in soils and leaves maximum technical efficiency (MTE) doses are relevant information to define the best K fertilization strategies. The aim this study was determine reference values soil, using Bayesian analysis, order maximize grape yield must quality ‘Chardonnay’ ‘Pinot Noir’ grown a subtropical climate. vines were subjected applications 0, 20,...

We investigated the role of fimbrial and afimbrial adhesions in the attachment of Xylella fastidiosa (Xf) to grape. We have individually disrupted FimA, FimF, XadA, and HxfB to assess their role in adhesion to plants and in the disease process. We performed adhesion assays using each mutant and wild-type separately as well as a combination of two mutants at one time to observe the phenotypes of...

The practical application of grape quality zoning and selective harvesting in small vineyards (<1 ha) has not yet gained much importance worldwide. However, winegrowers with are looking for ways to improve wine maximise profit. Therefore, the aim this study was identify most predictive vegetation index among three indices—NDVI, NDRE, OSAVI—at grapevine growth stages efficient use production ...