Abstract
Various oils can efficiently control a wide range of pests and pathogens on plants. In this study, we tested the effectiveness solely applied paraffin oil (PFO) spraying against Erysiphe necator, the causal agent of grape powdery mildew (GPM). Its effects on gas exchange and yield at harvest were also investigated. Experiments were conducted in Eger between 2013 and 2014 with two cultivars (Kékfrankos and Chardonnay) showing differing susceptibility to GPM. Treatments with 2.2 and 3.3 v/v% PFO spraying inhibited GPM; however, this effect was influenced by the individual resilience of the variety and the infection pressure of the vintage. The PFO treatment caused decreased leaf gas exchange parameters compared to conventional treatment. The berry yield was also lower in PFO-treated parcels, although yield may be affected by numerous factors and requires further investigation. The mineral oils may have a phytotoxic effect on the grapevine through impairment of the photosynthetic performance, although this effect cannot be connected to a particular PFO concentration according to our research results. This negative effect of PFO highly depends on the ampelographic characteristics of the examined cultivars and vintage. In addition, the physical properties of the spraying agent may also play an important role.
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Claims 5
Claim · model-written summary
Both 2.2 and 3.3 v/v% paraffin oil sprays inhibited grape powdery mildew.
- Taxon
- Vitis vinifera L.
Vitis viniferat0 - Treatment
- 2.2 and 3.3 v/v% PFO sprayinge1
- Interactor
- GPMe1pathogen
- Outcome
- GPMe1
- Direction
- inhibitede1
- Qualifier
- individual resilience of the variety and the infection pressure of the vintagee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“(Vitis vinifera L.)”
e1“Treatments with 2.2 and 3.3 v/v% PFO spraying inhibited GPM; however, this effect was influenced by the individual resilience of the variety and the infection pressure of the vintage.”
Claim · model-written summary
Paraffin oil decreased grapevine leaf gas exchange relative to conventional treatment.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- PFO treatmente1
- Outcome
- leaf gas exchange parameterse1
- Direction
- decreasede1
- Comparator
- conventional treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“(Vitis vinifera L.)”
e1“The PFO treatment caused decreased leaf gas exchange parameters compared to conventional treatment.”
Claim · model-written summary
Berry yield was lower in paraffin oil treated parcels.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- PFO-treated parcelse1
- Outcome
- berry yielde1
- Direction
- lowere1
- Qualifier
- yield may be affected by numerous factors and requires further investigatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“(Vitis vinifera L.)”
e1“The berry yield was also lower in PFO-treated parcels, although yield may be affected by numerous factors and requires further investigation.”
Claim · model-written summary
The authors suggest mineral oils may impair grapevine photosynthesis and thereby cause phytotoxicity.
- Treatment
- mineral oilse1
- Outcome
- phytotoxic effecte1
- Qualifier
- impairment of the photosynthetic performancee1
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“(Vitis vinifera L.)”
e1“The mineral oils may have a phytotoxic effect on the grapevine through impairment of the photosynthetic performance”
Claim · model-written summary
The observed negative paraffin oil effect could not be tied to one concentration and depended on cultivar characteristics and vintage.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Outcome
- negative effect of PFOe1
- Qualifier
- ampelographic characteristics of the examined cultivars and vintagee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“(Vitis vinifera L.)”
e1“although this effect cannot be connected to a particular PFO concentration according to our research results. This negative effect of PFO highly depends on the ampelographic characteristics of the examined cultivars and vintage.”
The same questions in other papers
application · disease · Vitis vinifera (wine grape)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- 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.