Abstract
Potassium sorbate, a program of four fungicides, or one of three chitosan formulations were applied to clusters of 'Thompson Seedless' grape berries at berry set, pre-bunch closure, veraison, and 2 or 3 weeks before harvest. After storage at 2°C for 6 weeks, the natural incidence of postharvest gray mold was reduced by potassium sorbate, the fungicide program, or both together in a tank mixture, in 2009 and 2010. In 2011, the experiment was repeated with three chitosan products (OII-YS, Chito Plant, and Armour-Zen) added. Chitosan or fungicide treatments significantly reduced the natural incidence of postharvest gray mold among grape berries. Berries harvested from vines treated by two of the chitosan treatments or the fungicide program had fewer infections after inoculation with Botrytis cinerea conidia. None harmed berry quality and all increased endochitinase activity. Chitosan decreased berry hydrogen peroxide content. One of the chitosan formulations increased quercetin, myricetin, and resveratrol content of the berry skin. In another experiment, 'Princess Seedless' grape treated with one of several fungicides before 4 or 6 weeks of cold storage had less decay than the control. Fenhexamid was markedly superior to the other fungicides for control of both the incidence and spread of gray mold during storage.
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Claims 13
Claim · model-written summary
Potassium sorbate reduced postharvest gray mold incidence in 2009 and 2010.
- Taxon
- grapee1
- Material
- 'Thompson Seedless'e1
- Treatment
- potassium sorbatee0
- Outcome
- incidence of postharvest gray molde0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“the natural incidence of postharvest gray mold was reduced by potassium sorbate, the fungicide program, or both together in a tank mixture, in 2009 and 2010.”
e1“'Thompson Seedless' grape berries”
Claim · model-written summary
The fungicide program reduced postharvest gray mold incidence in 2009 and 2010.
- Taxon
- grapee1
- Material
- 'Thompson Seedless'e1
- Treatment
- the fungicide programe0
- Outcome
- incidence of postharvest gray molde0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“the natural incidence of postharvest gray mold was reduced by potassium sorbate, the fungicide program, or both together in a tank mixture, in 2009 and 2010.”
e1“'Thompson Seedless' grape berries”
Claim · model-written summary
The combined sorbate and fungicide tank mix reduced postharvest gray mold incidence.
- Taxon
- grapee1
- Material
- 'Thompson Seedless'e1
- Treatment
- both together in a tank mixturee0
- Outcome
- incidence of postharvest gray molde0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“the natural incidence of postharvest gray mold was reduced by potassium sorbate, the fungicide program, or both together in a tank mixture, in 2009 and 2010.”
e1“'Thompson Seedless' grape berries”
Claim · model-written summary
Chitosan significantly reduced natural postharvest gray mold incidence.
Not reportedComparator
Verbatim
e0“Chitosan or fungicide treatments significantly reduced the natural incidence of postharvest gray mold among grape berries.”
Claim · model-written summary
Fungicides significantly reduced natural postharvest gray mold incidence.
- Taxon
- grapee0
- Treatment
- fungicide treatmentse0
- Outcome
- incidence of postharvest gray molde0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Chitosan or fungicide treatments significantly reduced the natural incidence of postharvest gray mold among grape berries.”
Claim · model-written summary
Two chitosan treatments reduced Botrytis infections after inoculation.
- Taxon
- grapee1
- Treatment
- two of the chitosan treatmentse0
- Interactor
- Botrytis cinerea
Botrytis cinereae0pathogen - Outcome
- infectionse0
- Direction
- fewere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Berries harvested from vines treated by two of the chitosan treatments or the fungicide program had fewer infections after inoculation with Botrytis cinerea conidia.”
e1“'Thompson Seedless' grape berries”
Claim · model-written summary
The fungicide program reduced Botrytis infections after inoculation.
- Taxon
- grapee1
- Treatment
- the fungicide programe0
- Interactor
- Botrytis cinereaBotrytis cinereae0pathogen
- Outcome
- infectionse0
- Direction
- fewere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Berries harvested from vines treated by two of the chitosan treatments or the fungicide program had fewer infections after inoculation with Botrytis cinerea conidia.”
e1“'Thompson Seedless' grape berries”
Claim · model-written summary
None of the treatments harmed berry quality.
Not reportedTreatmentComparator
Verbatim
e0“None harmed berry quality and all increased endochitinase activity.”
t0“Preharvest Fungicide, Potassium Sorbate, or Chitosan Use on Quality and Storage Decay of Table Grapes”
Claim · model-written summary
All treatments increased berry endochitinase activity.
Not reportedTreatmentComparator
Verbatim
e0“None harmed berry quality and all increased endochitinase activity.”
t0“Preharvest Fungicide, Potassium Sorbate, or Chitosan Use on Quality and Storage Decay of Table Grapes”
Claim · model-written summary
Chitosan decreased berry hydrogen peroxide content.
Not reportedComparator
Verbatim
e0“Chitosan decreased berry hydrogen peroxide content.”
t0“Preharvest Fungicide, Potassium Sorbate, or Chitosan Use on Quality and Storage Decay of Table Grapes”
Claim · model-written summary
One chitosan formulation increased quercetin, myricetin and resveratrol content.
- Taxon
- Grapest0
- Organ / stage
- berry skine0
- Treatment
- One of the chitosan formulationse0
- Outcome
- quercetin, myricetin, and resveratrol contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“One of the chitosan formulations increased quercetin, myricetin, and resveratrol content of the berry skin.”
t0“Preharvest Fungicide, Potassium Sorbate, or Chitosan Use on Quality and Storage Decay of Table Grapes”
Claim · model-written summary
Preharvest fungicides reduced cold-storage decay in Princess Seedless grape.
Verbatim
e0“'Princess Seedless' grape treated with one of several fungicides before 4 or 6 weeks of cold storage had less decay than the control.”
Claim · model-written summary
Fenhexamid was superior to other fungicides against gray mold incidence and spread.
Verbatim
e0“Fenhexamid was markedly superior to the other fungicides for control of both the incidence and spread of gray mold during storage.”
t0“Preharvest Fungicide, Potassium Sorbate, or Chitosan Use on Quality and Storage Decay of Table Grapes”
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- no effect
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See all 26 papers →fungicide · Botrytis cinerea · VitisResults agree
6 papers in the same direction as this paper
- positive
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See all 7 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.