Abstract
Control of downy mildew on grapevines in organic viticulture in Europe is mainly based on using copper-based fungicides. However, the effect of these agents is often insufficient to prevent losses when infestation pressure is high. The addition of sulfur, which is primarily used to control powdery mildew, improves the effect of copper on downy mildew. In three out of five trial years, sulfur had a clear positive effect when it was added during spray treatments against Plasmopara viticola, the causal agent of downy mildew on grapevines. This was evident mainly in the fruits; no further positive effect on the leaves was evident. In addition, the present study shows that copper-based fungicides are effective on leaves but have a rather poor effect on grapevine fruit. Furthermore, the study demonstrates that the effect of copper is significantly worse than that of the chemical synthetic contact fungicide folpet.
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Claims 6
Claim · model-written summary
Added sulfur improved copper control of downy mildew in three of five trial years.
- Treatment
- sulfure0
- Interactor
- Plasmopara viticola
Plasmopara viticolae0pathogen - Outcome
- downy mildewe0
- Direction
- positive effecte0
- Qualifier
- three out of five trial yearse0
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In three out of five trial years, sulfur had a clear positive effect when it was added during spray treatments against Plasmopara viticola, the causal agent of downy mildew on grapevines”
Claim · model-written summary
The sulfur benefit was mainly evident in fruits.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was evident mainly in the fruits; no further positive effect on the leaves was evident”
e1“downy mildew on grapevines in organic viticulture”
Claim · model-written summary
Sulfur had no further positive effect on leaves.
- Organ / stage
- leavese0
- Treatment
- sulfure1
- Interactor
- Plasmopara viticolaPlasmopara viticolae1pathogen
- Outcome
- positive effect on the leavese0
- Direction
- no further positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no further positive effect on the leaves was evident”
e1“sulfur had a clear positive effect when it was added during spray treatments against Plasmopara viticola, the causal agent of downy mildew on grapevines”
Claim · model-written summary
Copper fungicides controlled downy mildew on leaves.
- Organ / stage
- leavese0
- Treatment
- copper-based fungicidese0
- Interactor
- Plasmopara viticolaPlasmopara viticolae1pathogen
- Outcome
- effective on leavese0
- Direction
- effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper-based fungicides are effective on leaves but have a rather poor effect on grapevine fruit”
e1“Plasmopara viticola, the causal agent of downy mildew on grapevines”
Claim · model-written summary
Copper fungicides had a poor effect on grapevine fruit.
- Organ / stage
- fruite0
- Treatment
- copper-based fungicidese0
- Interactor
- Plasmopara viticolaPlasmopara viticolae1pathogen
- Outcome
- effect on grapevine fruite0
- Direction
- poore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper-based fungicides are effective on leaves but have a rather poor effect on grapevine fruit”
e1“Plasmopara viticola, the causal agent of downy mildew on grapevines”
Claim · model-written summary
Copper was significantly less effective than folpet.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of copper is significantly worse than that of the chemical synthetic contact fungicide folpet”
e1“downy mildew on grapevines in organic viticulture”
The same questions in other papers
copper atom · nutrient: content · VitisPositive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
fungicide · Plasmopara viticola · VitisPositive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 papers →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.