terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Conventional and alternative pest management strategies: a comparative proteomic study on musts

Conventional and alternative pest management strategies: a comparative proteomic study on musts

Abstract

In a context of sustainable agriculture, “agroecological immunity” is an emerging concept to reduce the use of chemical pesticides to protect crops against pathogens. This alternative strategy aims to combine different levers including the use of “bio”solutions. These include biocontrol products, some of which being plant defense elicitors, as well as products authorized in organic farming such as copper or sulfur. In vineyards, depending on climate conditions, powdery and downy mildews can be devastating diseases. So, to guarantee the yield and quality of the harvest, it is usually necessary to treat vines against these diseases from the 5/6-leaf stage to the bunch closure stage. In the present study carried out on a Chardonnay plot located at Lugny (Mâconnais Vineyard, France), we compared, the conventional vineyard protection strategy to the alternative one using “bio” solutions. The latter included the use of copper/sulfur and phosphonate or Bacillus-based products. For the two studied vintages (2020 and 2021), up to 8 treatments were applied whatever the protection strategy used. Besides the evaluation of the protection efficacy against downy and powdery mildews, we performed proteomic analyses (LC-MS/MS) to assess the impact of these two crop protection strategies on must quality. Among the 1041 proteins analyzed, 215 were significantly differentially expressed and the clustering analysis allowed to distinguish the two vintages rather than the protection management strategies. At last, a label-free quantification of proteins using spectral counting was performed from 2021 vintage and finally revealed that less than 2% of proteins were significantly differentially expressed between the two-pest management used.

Acknowledgements: We acknowledge F. Bidaut (Vinipôle Sud Bourgogne, Mâcon, France).

DOI:

Publication date: October 10, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Héloir M-C.1*Ϯ, Lemaitre-Guillier C.1 Ϯ, Schaeffer C.2, Strub J-M.2, Deulvot C.1, Adrian M.1

1Agroécologie, CNRS, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, Dijon, France.
2 Laboratoire de Spectrométrie de Masse Bio-Organique (LSMBO), IPHC, Univ. de Strasbourg, CNRS, Strasbourg, France.

Ϯ: co- first authors

Contact the author*

Keywords

biocontrol, grapevine protection, proteomic analysis, vineyard

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Selecting green cover species in the under-trellis zone of Lower Austrian vineyards

The under-trellis zone of vineyards is a sensitive area through which vines cover a significant portion of their nutrient and water needs. Mechanical and chemical methods are applied to suppress competing and tall-growing weeds to ensure optimal vine growth conditions. In addition to higher operating costs and depending on the soil conditions, these practices might lead to a long-term reduction in soil fertility and biodiversity. The presented study aims to analyse the suitability and interspecies competition of a selected green cover mixture of five local herbaceous species as potential green cover mixture in the under-trellis area of Lower Austrian vineyards.

Detoxification capacities of heavy metals and pesticides by yeasts 

Winegrowing is still characterized by the extensive use of chemical fertilizers and plant protection products, despite strong recommendations to limit these practices. A part of these xenobiotics and metals are then found in grape juice and wine, causing a major health concern, as well as negatively affecting the fermentation process. In recent years, there has been renewed interest in non-Saccharomyces yeasts. These species have a wide phenotypic diversity, which would be exploited to broaden the aromatic palette of wines.

Culturable microbial communities associated with the grapevine soil in vineyards of La Rioja, Spain

The definition of soil health is complex due to the lack of agreement on adequate indicators and to the high variability of global soils. Nevertheless, it has been widely used as synonymous of soil quality for more than one decade, and there is a consensus warning of scientists that soil quality and biodiversity loss are occurring due to the traditional intensive agricultural practices.
In this work we monitored a set of soil parameters, both physicochemical and microbiological, in an experimental vineyard under three different management and land use systems: a) addition of external organic matter (EOM) to tilled soil; b) no tillage and plant cover between grapevine rows, and c) grapevines planted in rows running down the slope and tilled soil.

Vineyard management practices to reduce sugar content on ‘Monastrell’ grapes

Climate change is resulting in more dry and hot summers, accelerating grape ripening and increasing berry sugars concentration. This results in wines with a higher alcohol content, which has a negative impact on wine quality, as well as, on consumer health. Agronomic practices that minimize these effects on berry composition and, consequently, on wine quality must be defined. In this work, different management practices have been assessed on rainfed ‘Monastrell’ grapevines in Jumilla (Murcia, Spain) from 2021 to 2023 vintages. Mulching, shading, application of kaolin and different types of pruning were evaluated, among others field adaptation practices.

Typicality of Rioja wines: identification of sensory profiles for the three subregions of DOCa Rioja

Within the DOCa Rioja three main production areas are differentiated: Rioja Alta (RA), Rioja Alavesa (RAv) and Rioja Oriental (RO). They are three diverse territories with particular characteristics that are claimed to give rise to differentiated profiles. The present work aims at evaluating the sensory diversity of young commercial red wines in these three subregions. Therefore 30 young red wines (mainly Tempranillo and vintage 2021), ten from each subregion, were sensory described following a non-verbal free sorting task and a verbal free comment task by 32 well-established Rioja winemakers.