STONE FRUIT RIPENING. Yellow Flesh Peach Consumer Acceptance Mealiness. Lack of Flavor. F. Browning. Uneven Ripening
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1 STONE FRUIT RIPENING Mealiness Lack of Flavor F. Browning Uneven Ripening Carlos H. Crisosto University of California, Davis Yellow Flesh Peach Consumer Acceptance > FIRMNESS (lbf.) < CONSUMER ACCEPTANCE (%) Effect of Temperature on Carnival Peach Chilling Injury After Storage Plus Days at 8ºF 3ºF 3ºF 1ºF Killing Temperature Range ºF 50ºF Crisosto, Carlos H., F. Gordon Mitchell, and Zhiguo Ju Susceptibility to chilling injury of peach, nectarine, and plum cultivars grown in California. HortScience 3():
2 Stone Fruit Ripening Production Tree Ripe Well Mature (10-1 lbf.) Store Consumption (10-8lbf.) Warehouse (1 lbf.) Production Tree Ripe Well Mature (10-1 lbf.) Store Consumption (- lbf.) Ready to Eat Warehouse Ripening (1 lbf.) Mature Ripening (ºF) Ready to Buy Flesh Softening ( lbf. P/N) (5 lbf. plums)
3 O'Henry Ripening Firmness (lbs.) lbs. / day Days at 8 0 F O'Henry Ripening Firmness (lbs.) Transfer Point Warehouse / Store 3.0 Days Days at 8 0 F O'Henry Ripening Firmness (lbs.) "Ready to eat" Store / Consumer Initial Firmness Warehouse days Days at 8 0 F 3
4 Stone Fruit Ripening Terminology Mature Ready to Eat (1-10 pounds) (- pounds) Ready to Transfer (-8 pounds) Ready to Buy (-8 pounds) Preconditioned (-8 pounds) Weak position on the fruit Firmness Measurements Collecting data and using it
5 Stone Fruit Transport Stone fruit temperature measured upon arrival at the retail warehouse after 3 days truck shipment, 199 Temperature ( F) < >50 Percent of Shipment Nectarine Peach (n=103) (n=10) Plum (n=87) Peach Delayed Cooling (3% Mealy) (0% Mealy) 0ºC 0 Days (100% Mealy) 0ºC 8 Hours + 0ºC 0 Days` (0% Mealy) 5ºC 0 Days 0ºC 8 Hours + 5ºC 0 Days Crisosto, Carlos H., David Garner, Harry L. Andris, and Kevin R. Day. Controlled delayed cooling extends peach market life. HortTechnology 1: Product Flow Through the Preconditioning Process Arrival Move Precooling Hydrocooling Forced air Room Cooling Cold Storage Holding/Partial Preconditioning Warm Packing Forced Air Cooling Packaging Wax & fungicide Segregation Preconditioning 5
6 Do we need to apply Ethylene? ETHYLENE NO Peach Market Life Increase in market life of preconditioned peaches during 8h at 8 o F compared to untreated (no cooling delay) based on development of chilling injury during storage at 3 or 1 F. Change in delayed cooling treatment Change in maximum market life at 3 F (weeks) Change in minimum market life at 1 F (weeks) Elegant Lady Summer Lady 1 + 1, O'Henry Zee Lady Ryan Sun + Basic Requirements of the Preconditioning Program Infrastructure such as a ripening room and forced air capacity should be available for a reliable preconditioning/pre-ripening program. Trained and experienced quality assurance personnel and a ripener are key components of this program. Make quality data accessible.
7 Critical Points for a Successful Preconditioning Program Optimize your fungicide application operation. Slow down fruit softening after preconditioning-pre-ripening process. Control fruit and chamber temperature conditions and fruit firmness evolution during the preconditioning-pre-ripening process. Monitor and determine the end of the preconditioning-preripening process. Retail handling instruction for preconditioned fruit. Communicate with Your Growers, Merchandisers or Supervisors Ripening ending point 7
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Cooperative Extension in Franklin County 181 Franklin Farm Lane Chambersburg, PA 17202 (717) 263-9226 Fax: (717) 263-9228 E-mail: FranklinExt@PSU.EDU Title: Report, High Tunnel Fresh Market Slicer Tomato
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