Abstract
Plant resistance inducers (PRIs) harbor promising potential for use in downy mildew (DM) control in viticulture. Here, the effects of six commercial PRIs on some epidemiological components of Plasmopara viticola (Pv) on grapevine leaves were studied over 3 years. Disease severity, mycelial colonization of leaf tissue, sporulation severity, production of sporangia on affected leaves, and per unit of DM lesion were evaluated by inoculating the leaves of PRI-treated plants at 1, 3, 6, 12, and 19 days after treatment (DAT). Laminarin, potassium phosphonate (PHO), and fosetyl-aluminium (FOS) were the most effective in reducing disease severity as well as the Pv DNA concentration of DM lesions on leaves treated and inoculated at 1 and 3 DAT; PHO and FOS also showed long-lasting effects on leaves established after treatment (inoculations at 6 to 19 DAT). PRIs also prevented the sporulation of Pv on lesions; all the PRI-treated leaves produced fewer sporangia than the nontreated control, especially in PHO-, FOS-, and cerevisane-treated leaves (>75% reduction). These results illustrate the broader and longer effect of PRIs on DM epidemics. The findings open up new perspectives for using PRIs in a defense program based on single, timely, and preventative field interventions.
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Claims 6
Claim · model-written summary
Laminarin reduced disease severity and pathogen DNA at one and three days.
- Treatment
- Laminarine0
- Outcome
- disease severity as well as the Pv DNA concentratione0
- Direction
- reducinge0
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Laminarin, potassium phosphonate (PHO), and fosetyl-aluminium (FOS) were the most effective in reducing disease severity as well as the Pv DNA concentration of DM lesions on leaves treated and inoculated at 1 and 3 DAT”
t0“Grapevine”
Claim · model-written summary
Potassium phosphonate reduced disease severity and pathogen DNA.
- Treatment
- potassium phosphonate (PHO)e0
- Outcome
- disease severity as well as the Pv DNA concentratione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Laminarin, potassium phosphonate (PHO), and fosetyl-aluminium (FOS) were the most effective in reducing disease severity as well as the Pv DNA concentration of DM lesions on leaves treated and inoculated at 1 and 3 DAT”
t0“Grapevine”
Claim · model-written summary
Fosetyl-aluminium reduced disease severity and pathogen DNA.
- Treatment
- fosetyl-aluminium (FOS)e0
- Outcome
- disease severity as well as the Pv DNA concentratione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Laminarin, potassium phosphonate (PHO), and fosetyl-aluminium (FOS) were the most effective in reducing disease severity as well as the Pv DNA concentration of DM lesions on leaves treated and inoculated at 1 and 3 DAT”
t0“Grapevine”
Claim · model-written summary
PHO and FOS had lasting effects on later-established leaves.
- Outcome
- long-lasting effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PHO and FOS also showed long-lasting effects on leaves established after treatment (inoculations at 6 to 19 DAT)”
t0“Grapevine”
Claim · model-written summary
PRI-treated leaves produced fewer sporangia than untreated leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the PRI-treated leaves produced fewer sporangia than the nontreated control”
t0“Grapevine”
Claim · model-written summary
PHO-, FOS-, and cerevisane-treated leaves had more than 75% sporangia reduction.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially in PHO-, FOS-, and cerevisane-treated leaves (>75% reduction)”
t0“Grapevine Leaves”
e1“all the PRI-treated leaves produced fewer sporangia than the nontreated control”
The same questions in other papers
fosetyl-Al · disease · VitisPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →phosphonate · disease · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
laminarin · disease · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
potassium · disease · VitisPositive and negative results
11 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
9 papers more in this group
See all 13 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.