Abstract
Pinots (Vitis vinifera L.) are known as tight-clustered grape varieties, where the mechanical pressure of adjacent berries may disrupt cuticle waxes, thus predisposing these sites to greater incidences of infection. One of the main causes of crop quality degradation is grape rot due to the development of various microorganisms (bacteria, yeasts or other fungi). Among them Botrytis cinerea is one of the most frequent problems. Because mold spores are ubiquitous, the control of germination and growth in the vineyard by use of fungicides may only be part of the solution. Therefore, carefully selected cultural practices may play a significant role toward encouraging or discouraging mold and other microbial infections. A field trial was established in Pinot Noir vineyard of Vipava Valley for two consecutive years. Preliminary results based on visual examination of microbial compromised grapes indicated that earlier leaf removal treatments reduced the extent of microbe damage on grape. Therefore in the following harvest three different treatments of leaf removal (at pre-flowering, berry-set and veraison phase of grape development) were performed, using untreated vines as a control. Temperature and humidity data were collected in the grape area of all treatments. Microbial population on grapes was followed using standard cultivation methods during ripening and at harvest time as well as visual inspection of damaged / sound grapes was performed at both times. At harvest time compactness of grapes was also evaluated. Parallel trial with excluding last Switch® application was done to evaluate the effect in different treatments. In general we observed the change in species composition on the surface of grapes with early predominance by the basidiomycetous yeasts and species Aureobasidium pullulans, and at harvest time with the prevalence of the ascomycetous yeasts, lactic / acetic acid bacteria and molds. Leaf removal was much more effective against Botrytis Cinerea compering to additional Switch® application, especially at leaf removals at earlier stages. Pre-flowering leaf removal also showed significant reduction of grape compactness. The results suggesting early leaf removals as successful tool for reducing the risk of microbial infections.
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Claims 6
Claim · model-written summary
Leaf removal was more effective than additional Switch® application against Botrytis cinerea, especially at earlier leaf removal stages.
- Treatment
- Leaf removale0
- Interactor
- Botrytis Cinerea
Botrytis cinereae0pathogen - Outcome
- effective against Botrytis Cinereae0
- Direction
- more effectivee0
- Qualifier
- especially at leaf removals at earlier stagese0
- Comparator
- additional Switch® applicatione0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Controlling microbial infection by managing grapevine canopy”
e0“Leaf removal was much more effective against Botrytis Cinerea compering to additional Switch® application, especially at leaf removals at earlier stages”
Claim · model-written summary
Pre-flowering leaf removal significantly reduced grape compactness compared with untreated vines.
Verbatim
e0“Pre-flowering leaf removal also showed significant reduction of grape compactness”
e1“using untreated vines as a control”
Claim · model-written summary
Earlier leaf removal treatments reduced the extent of microbe damage on grapes in preliminary visual examination.
- Taxon
- grapee0
- Treatment
- earlier leaf removal treatmentse0
- Outcome
- extent of microbe damage on grapee0
- Direction
- reducede0
- Qualifier
- Preliminary results based on visual examinatione0
Not reportedComparator
Verbatim
e0“Preliminary results based on visual examination of microbial compromised grapes indicated that earlier leaf removal treatments reduced the extent of microbe damage on grape”
Claim · model-written summary
Grape surface species composition showed early predominance of basidiomycetous yeasts and Aureobasidium pullulans.
Verbatim
e0“In general we observed the change in species composition on the surface of grapes with early predominance by the basidiomycetous yeasts and species Aureobasidium pullulans”
Claim · model-written summary
At harvest, grape surface species composition showed prevalence of ascomycetous yeasts, lactic / acetic acid bacteria and molds.
Verbatim
e0“and at harvest time with the prevalence of the ascomycetous yeasts, lactic / acetic acid bacteria and molds”
e1“the change in species composition on the surface of grapes”
Claim · model-written summary
Early leaf removals are a successful tool for reducing the risk of microbial infections in grapevine.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Controlling microbial infection by managing grapevine canopy”
e0“The results suggesting early leaf removals as successful tool for reducing the risk of microbial infections”
The same questions in other papers
pruning · pest · VitisPositive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
1 paper more in this group
See all 5 papers →pruning · Botrytis cinerea · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.