Canadian Grapevine Certification Network
Science Coordination involves the coordination and monitoring of Cluster science and research activities. This includes liaising with Principal Investigators, ensuring research is aligned with priorities, reviewing annual and final results reports, and assisting researchers in organizing and executing Knowledge and Technology Transfer (KTT) activities.
Field strategies to mitigate the impact of grapevine viruses in British Columbia
Jose Ramon Urbez-Torres and Tom Lowery
This activity continues work performed under a BC GF2 AgriInnovation Program with increased focus on the role of vectors in the spread of leafroll and red blotch viruses and on long term mitigation. Small lots of wine will be made from infected plants to assess impacts on wine sensory attributes that will be validated by sensory panels.
Grapevine virus diseases and Virus Vector Control
Wendy McFadden-Smith and Justin Renkema
Brock University and AAFC Vineland
Survey Ontario vineyards for rate of incidence of leafroll and red blotch virus; determine rate and mode of transmission; evaluate vector populations and role; investigate impact on plant physiology and fruit quality, develop mitigation strategy for vector control
Survey and evaluation of viruses (GVLRa-1 and -3 and GVRBaV) and their effects on plants (including hybrids)
Survey Nova Scotia vineyards for presence of virus; compare performance of infected and uninfected vines; evaluate physiological parameters; survey for presence of vectors
Assessing Grapevine Cold Hardiness under Climatic Conditions of Eastern Canada by applying various techniques
Caroline Provost and Gaetan Bourgeois
Centre de recherche agroalimentaire de Mirabel (CRAM) and AAFC St-Jean-sur-Richelieu
Three separate sub activities aim to
- develop a monitoring and modeling system for cold hardiness of a number of different cultivars;
- evaluate protection systems (geotextiles) for cold sensitive cultivars.
- assess the use of rootstocks to improve cold hardiness of hybrid cultivars.
Factors Affecting Grapevine Winter Hardiness
6 objectives are to
- study effect of timed water stress, root stock selection, young vine protection and vine senescence on hardiness;
- continue bud hardiness testing and develop model that can replace testing;
- continue to investigate bud and phloem tissue exposed to cold temperatures;
- explore grapevine root hardiness and impact of cold injuries to roots;
- assess grapevine disease effect on winter hardiness;
- identify cold hardy vines for clonal selection.
Grapevine evaluation and cold hardiness program to ensure superior plant material for Canadian Grapevine Certification Network and to improve sustainability of the Canadian Grape and Wine Industry
Jim Willwerth and Harrison Wright
Brock University and AAFC Kentville
Main objectives are to:
- evaluate grapevine material for performance, cold tolerance and quality and improve the sustainability of the entire Grape and Wine Industry;
- Assist with selection of superior plant material for the Canadian Grapevine Certification Network as well as future plantings across Ontario.
Evaluate the cost-effectiveness of canopy management practices as an aid to reduce disease pressure
Odile Carisse and Caroline Provost
AAFC St-Jean-sur-Richelieu and Centre de recherche agroalimentaire de Mirabel
- survey of the Quebec grape industry to evaluate the current canopy management practices including timing, level of exposure and the grower’s expected benefit;
- investigate the influence of canopy and fruit zone management practices on microclimate, fungicide penetration (efficiency of coverage), disease progress, pathogen populations and yield losses (damages);
- adaptation of disease management decisions for canopy and fruit zone management practices;
- determine the economics of canopy management practices for disease management and fruit quality using cost/benefit analysis
Optimization of grape production in Eastern Canada: Toward an understanding of the relationships between growing conditions, berry ripening, berry maturity assessment, and wine quality
Karine Pedneault and John DeLong
Universite Sainte-Anne and AAFC Kentville
Objectives are to:
- understand the impact of temperature on berry ripening, composition and sensory perception in Vitis varieties grown in Eastern Canada using an experimental approach;
- optimize harvest decisions to improve wine quality in Eastern Canada: Insights into berry to wine sensory perception and consumer preference;
- develop a non-destructive model for assessing grape maturity at harvest & advancing harvest maturity of Nova Scotia wine grapes.
Water and nutrient management strategies, and health promoting natural products can reduce the competition between grapevine and cover crops and enhance health and productivity of vineyards
Medhi Sharifi and Francisco Diez
AAFC Summerland and Perrenia
The focus of this study is on water and nutrient management for Canadian vineyards. Specific objectives:
- to investigate Subsurface Water Retention Technology (SWRT) and biochar-compost mixture inter-row application for improving soil water holding capacity and reducing the competition between grape vine and cover crops for water and nutrients.
- To evaluate the effect of Vermi Compost (VC), VC tea and Stella Maris application rate, method and frequency on yield, fruit quality, plant nutrient status and plant and/or soil health.
Nitrogen Management in Viticulture and Enology: Improving grape and wine quality and enhancing vineyard sustainability through precision management of N and strategies to increase natural yeast assimilable nitrogen in grapes and wine
- Vineyard nitrogen management: Soil and foliar N application to determine the impact on and relationships among amino acid profiles, yeast assimilable nitrogen (YAN) content, fruit quality, bud hardiness and flavonoids (pigment and tannin); evaluate the effectiveness of N application to alleviate leaf roll virus symptoms of reduced yield and maturity; spectral imaging and precision management for vineyard N status using drone technology.
- Wine nitrogen management: Evaluate early and late broadcast N and late foliar N application in the field for impacts on wine quality including amino acid profiles, fermentation kinetics, sensory evaluation, wine protein content and compounds related to N metabolism (e.g. Flavonoids); determine the influence that amino acid composition and diammonium phosphate additions have on wine flavour, aroma profiles and fermentation kinetics; evaluate YAN requirements in icewine and high sugar musts with respect to recent findings on yeast nutrition such as biotin, pantothenic acid and other vitamin requirements. Evaluate wine proline content in relation to field conditions and nitrogen treatments and determine if there is a relationship with wine body.
TanninAlert: Improving Canadian red wine quality and consumer acceptance through winemaking techniques by grape variety and tannin level
The main objective of this project is to improve Canadian red wine quality by ensuring grape phenolic ripeness is incorporated into harvest decisions. Scientific knowledge for the Canadian wine industry regarding tannin concentrations in seeds and skins of varieties specific to wine style will be acquired. This will result in red winemaking guidelines tailored to tannin concentrations from the grape tannin database. The program will initially start to build a database in Ontario, but once established, will be extended to the rest of Canada.