Apple water core a seasonal problem. Stephen Tancred Stanthorpe 14 th June 2011
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1 Apple water core a seasonal problem Stephen Tancred Stanthorpe 14 th June 2011
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5 What is water core? A disorder, not a disease Only develops on the tree Can reduce in store or go to breakdown Flooded air spaces between cells with sorbitol solution. Flooding looks water soaked. Starts around plumbing Red Dels and Fuji mainly, Sundowner and Granny Smith also
6 What is water core? A disorder, not a disease Only develops on the tree Can reduce in store or go to breakdown Flooded air spaces between cells with sorbitol solution. Flooding looks water soaked. Starts around plumbing Red Dels and Fuji mainly, Sundowner and Granny Smith also
7 What is water core? A disorder, not a disease Only develops on the tree Can reduce in store or go to breakdown Flooded air spaces between cells with sorbitol solution. Flooding looks water soaked. Starts around plumbing Red Dels and Fuji mainly, Sundowner and Granny Smith also
8 What is water core? A disorder, not a disease Only develops on the tree Can reduce in store or go to breakdown Flooded air spaces between cells with sorbitol solution. Flooding looks water soaked. Starts around plumbing Red Dels and Fuji mainly, Sundowner and Granny Smith also
9 Why be concerned? Considered a defect by chain stores when severe. May develop into breakdown in cold store (not on the shelf). - only if moderate or severe - more with Dels than Fuji. Water core fruit sensitive to CO 2, as internal air spaces full of liquid and CO 2 can t easily dissipate. Worse in CA.
10 Why be concerned? Considered a defect by chain stores when severe. May develop into breakdown in cold store (not on the shelf). - only if moderate or severe - more with Dels than Fuji. Water core fruit sensitive to CO 2, as internal air spaces full of liquid and CO 2 can t easily dissipate. Worse in CA.
11 Why be concerned? Considered a defect by chain stores when severe. May develop into breakdown in cold store (not on the shelf). - only if moderate or severe - more with Dels than Fuji. Water core fruit sensitive to CO 2, as internal air spaces full of liquid and CO 2 can t easily dissipate. Worse in CA.
12 What causes water core? Excess sorbitol from leaves in good seasons Advanced maturity & low night temps Early freezing (Washington State) Heat waves eg Southern Aust 2009 Worse on low calcium fruit, trees with lighter crops and vigorous trees. Worse on fruit exposed to most heat and sunlight.
13 What causes water core? Excess sorbitol from leaves in good seasons Advanced maturity & low night temps Early freezing (Washington State) Heat waves eg Southern Aust 2009 Worse on low calcium fruit, trees with lighter crops and vigorous trees. Worse on fruit exposed to most heat and sunlight.
14 What causes water core? Excess sorbitol from leaves in good seasons Advanced maturity & low night temps Early freezing (Washington State) Heat waves eg Southern Aust 2009 Worse on low calcium fruit, trees with lighter crops and vigorous trees. Worse on fruit exposed to most heat and sunlight.
15 What causes water core? Excess sorbitol from leaves in good seasons Advanced maturity & low night temps Early freezing (Washington State) Heat waves eg Southern Aust 2009 Worse on low calcium fruit, trees with lighter crops and vigorous trees. Worse on fruit exposed to most heat and sunlight.
16 How can I deal with water core? ReTain can delay & reduce the development. Do not CA water core fruit and move it quickly. Delayed cooling can reduce severity and mild water core may disappear with 2-3 m storage. The apple (still alive) can reabsorb sorbitol - warmer temps the re-absorption rate is higher. CA slows down apple s metabolism and reabsorption of sorbitol is slowed. Delayed cooling, warmer storage & no CA allows ethylene driven ripening - use SmartFresh to stop this.
17 How can I deal with water core? ReTain can delay & reduce the development. Do not CA water core fruit and move it quickly. Delayed cooling can reduce severity and mild water core may disappear with 2-3 m storage. The apple (still alive) can reabsorb sorbitol - warmer temps the re-absorption rate is higher. CA slows down apple s metabolism and reabsorption of sorbitol is slowed. Delayed cooling, warmer storage & no CA allows ethylene driven ripening - use SmartFresh to stop this.
18 How can I deal with water core? ReTain can delay & reduce the development. Do not CA water core fruit and move it quickly. Delayed cooling can reduce severity and mild water core may disappear with 2-3 m storage. The apple (still alive) can reabsorb sorbitol - warmer temps the re-absorption rate is higher. CA slows down apple s metabolism and reabsorption of sorbitol is slowed. Delayed cooling, warmer storage & no CA allows ethylene driven ripening - use SmartFresh to stop this.
19 How can I deal with water core? ReTain can delay & reduce the development. Do not CA water core fruit and move it quickly. Delayed cooling can reduce severity and mild water core may disappear with 2-3 m storage. The apple (still alive) can reabsorb sorbitol - warmer temps the re-absorption rate is higher. CA slows down apple s metabolism and reabsorption of sorbitol is slowed. Delayed cooling, warmer storage & no CA allows ethylene driven ripening - use SmartFresh to stop this.
20 How can I deal with water core? ReTain can delay & reduce the development. Do not CA water core fruit and move it quickly. Delayed cooling can reduce severity and mild water core may disappear with 2-3 m storage. The apple (still alive) can reabsorb sorbitol - warmer temps the re-absorption rate is higher. CA slows down apple s metabolism and reabsorption of sorbitol is slowed. Delayed cooling, warmer storage & no CA allows ethylene driven ripening - use SmartFresh to stop this.
21 How can I deal with water core? ReTain can delay & reduce the development. Do not CA water core fruit and move it quickly. Delayed cooling can reduce severity and mild water core may disappear with 2-3 m storage. The apple (still alive) can reabsorb sorbitol - warmer temps the re-absorption rate is higher. CA slows down apple s metabolism and reabsorption of sorbitol is slowed. Delayed cooling, warmer storage & no CA allows ethylene driven ripening - use SmartFresh to stop this.
22 The AgroFresh protocol Load room at 4 o C Cool 1 o C per week Hold at o C SmartFresh within 7 days of harvest Keep CO 2 < 1% and O 2 > 18% in regular air not CA. Flush room daily. Monitor fruit each week for 6 8 weeks. If it clears it may be put under CA, if not then start selling
23 The AgroFresh protocol Load room at 4 o C Cool 1 o C per week Hold at o C SmartFresh within 7 days of harvest Keep CO 2 < 1% and O 2 > 18% in regular air not CA. Flush room daily. Monitor fruit each week for 6 8 weeks. If it clears it may be put under CA, if not then start selling
24 The AgroFresh protocol Load room at 4 o C Cool 1 o C per week Hold at o C SmartFresh within 7 days of harvest Keep CO 2 < 1% and O 2 > 18% in regular air not CA. Flush room daily. Monitor fruit each week for 6 8 weeks. If it clears it may be put under CA, if not then start selling
25 The AgroFresh protocol Load room at 4 o C Cool 1 o C per week Hold at o C SmartFresh within 7 days of harvest Keep CO 2 < 1% and O 2 > 18% in regular air not CA. Flush room daily. Monitor fruit each week for 6 8 weeks. If it clears it may be put under CA, if not then start selling
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27 S 4 C 5 Water core Fuji apples, Stanthorpe % in each class Week 1 Week 2 Week 3 Week 4 Week 5 Week 6
28 Water core Red Dels, Stanthorpe Week 1 Week 2 Week 3 Week 4 Week 5 Week 6
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