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Storage Workshop Key Takeaways

Craig Kahlke, Team Leader, Fruit Quality Management
Lake Ontario Fruit Program

August 28, 2019

Storage Workshop Key Takeaways

Mike Basedow and Dan Donahue, CCE Eastern NY Commercial Horticulture



We both attended the storage workshop in Ithaca on August 8th, and thought we would share the main takeaways. We've included some recent recommendations for Honeycrisp, Gala, NY-1, NY-2, Mac, Cortland, and Empire, along with a quick comparison of utilizing dynamic controlled atmosphere (DCA) storage and 1-MCP.


Honeycrisp. For fruit stored in air, fruit should be stored at 38°F, with or without conditioning for 7 days at 50°F. Conditioning Honeycrisp will help reduce soft scald, but will likely exacerbate bitter pit. The decision to condition or not should be determined by your block history. If a block is very vulnerable to bitter pit, it is likely best to skip conditioning. However, if you rarely get bitter pit and often have issues with soft scald, conditioning would be warranted. Air stored fruit can be treated with 1-MCP, as it will help fruit retain acceptable levels of acidity. 1-MCP may also increase core breakdown, but may decrease the incidence of bitter pit and senescent breakdown. An increasing number of growers are using Harvista to manage their Honeycrisp harvest. Chris's recent work found that Harvista decreased soft scald, but increased bitter pit incidence on stored fruit. Fruit treated with a combination of Harvista and 1-MCP also had a greater incidence of leather blotch. For fruit destined for CA storage, CO2 injury can be problematic, and is generally worse further south in the state. CO2 injury can be controlled with diphenylamine (DPA), or by delaying CA storage by up to 4 weeks. In Chris's studies, fruit that were delayed CA storage for up to 4 weeks and treated with 1-MCP had very little loss of fruit quality, but greasiness and core browning did increase to a small extent. The overall recommendation for Honeycrisp currently is air storage with 1-MCP to avoid CA related injuries.


Gala. A major concern for Gala right now is stem end flesh browning (SEFB).

So far we know that:

·Harvista decreases the incidence of SEFB.

·CA in general is very helpful for maintain Gala quality, though differing the values of CO2 concentration in CA storage showed inconsistent effects on SEFB.

·DCA at .5% O2 will help to further delay browning development, but will not completely prevent it. DCA may also prevent core browning.

·1-MCP in storage appears to not have an effect on SEFB. Washington State and Ontario studies suggest delayed cooling, paired with early CA storage, may help to reduce some browning disorders. This approach needs more study in New York conditions.

Regardless of storage treatment, being on top of harvest date (erring earlier than later) and planting high-coloring strains like Brookfield that can be picked earlier are two of the best strategies for successful long-term storage of Gala.


NY-1. For successful long-term CA storage of NY-1, the current recommendation is to focus on your harvest management. NY-1 should be picked as early as possible to avoid fruit with high internal ethylene, though this may require compromising between ethylene and fruit color. Fruit should be stored at 38°F like Honeycrisp to reduce stem end flesh browning. Chris does not currently recommend 1-MCP for NY-1, as it aggravated flesh browning in his CA storage trial.


NY-2. Similar to NY-1, Chris suggests early harvest timing is key to maintaining good quality for long term CA storage. NY-2 should also be stored at 38°F. 1-MCP is recommended for NY-2. In Chris's studies, 1-MCP helped retain firmness, and reduced superficial scald and stem end flesh browning. It did, however, lead to some additional general flesh browning. Some of Chris's future work will determine how NY-1 and NY-2 respond to DCA storage and harvest management PGR's.


McIntosh. 1-MCP helps keep macs firm on the shelf after long-term storage, and will also help reduce superficial scald and senescent breakdown. It may, however, slightly increase CO2injury. DCA storage can be used in macs to reduce CO2injury.


Cortland are hard to control against superficial scald regardless of postharvest treatments, but both DCA and 1-MCP help to some extent. DCA plus 1-MCP returned the best fruit in Chris's trials, but the added expense might not make this approach feasible commercially. DCA helps maintain fruit quality regardless of 1-MCP treatment, but a tasting panel found that Cortland stored with 1-MCP maintained a better level of ‘snap' after storage.


1-MCP treated Empire tend to retain their firmness better, but these may pick up more CO2injury and flesh browning. For Empire flesh browning, the best way to keep levels down is to harvest at proper maturity. Later picks will pick up more browning, regardless of 1-MCP or DCA practices.


How does DCA stack up to 1-MCP? Dynamic controlled atmosphere (DCA) is a storage method that actively measures fruit response to storage oxygen levels to determine the optimum oxygen level for that storage room. By keeping the oxygen level just above the "low oxygen limit", respiration rate can be reduced to a minimum. By slowing respiration further, fruit quality out of DCA storage is higher, with less superficial scald. Below are some of the benefits (+) and negatives (-) of using DCA and 1-MCP.



  • Chemical Free
  • Easily installed in existing high quality storages
  • Can inhibit superficial scald and some internal flesh browning disorders
  • Need to have that high quality facility-Higher upfront investment costs
  • Need to select uniform fruit to serve as your samples
  • Requires training of storage operator to interpret fruit responses to O2levels
  • Greater potential for quality loss after storage, unless combined with 1-MCP1-MCP
  • Applied as a gas at low concentrations for 24 hours or less
  • High quality rooms not required
  • No investment on computerized CA technology
  • No risk of low O2injury
  • Flexible timing of 1-MCP application
  • Can maintain fruit quality in air storage
  • Can inhibit superficial scald development
  • Maintains quality parameters, like firmness and acidity, during the marketing chain
  • Not for organic use
  • Ongoing cost every time you apply
  • Can increase some physiological disorders, like CO2injury.

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Upcoming Events

2024 Tree Fruit & Small Fruit Twilight Meetings

Event Offers DEC Credits

April 25, 2024 : Tree Fruit & Small Fruit Twilight Meetings 1 of 4
Newark, NY

Join specialists Janet Van Zoeren, Anya Osatuke, and Anna Wallis for a conversation about fruit and berry phenology and pest management, at a new location each month.

Event Offers DEC Credits

May 30, 2024 : Tree Fruit & Small Fruit Twilight Meetings 2 of 4
Lockport, NY

Join specialists Janet Van Zoeren, Anya Osatuke, Robert Hadad, and Anna Wallis for a conversation about fruit and berry phenology, pest management, food safety and water quality, at a new location each month.

Event Offers DEC Credits

June 27, 2024 : Tree Fruit & Small Fruit Twilight Meetings 3 of 4
Penn Yan, NY

Join specialists Janet Van Zoeren, Anya Osatuke, Robert Hadad, and Anna Wallis for a conversation about fruit and berry phenology, pest management, food safety and water quality, at a new location each month.

Event Offers DEC Credits

July 25, 2024 : Tree Fruit & Small Fruit Twilight Meetings 4 of 4
Mexico, NY

Join specialists Janet Van Zoeren, Anya Osatuke, Robert Hadad, and Anna Wallis for a conversation about fruit and berry phenology, pest management, food safety and water quality, at a new location each month.

View 2024 Tree Fruit & Small Fruit Twilight Meetings Details

Apple Social

July 16, 2024 : Orleans County - Apple Social
Medina, NY

Please join us at this casual networking event for all apple industry folks from Western NY, proudly sponsored by Valent. There will just a brief introduction of the Lake Ontario Fruit Program, and from each of the four specialists.

July 31, 2024 : Wayne County - Apple Social
Williamson, NY

Please join us at this casual networking event for all apple industry folks from Western NY, proudly sponsored by Valent. There will just a brief introduction of the Lake Ontario Fruit Program, and from each of the four specialists.

View Apple Social Details

2nd Annual WNY Fruit Grower Tour

Event Offers DEC Credits

August 13, 2024
Medina, NY

We are excited to announce the second annual Western New York Fruit Grower Tour, the premier fruit tour of the northeast brought to you by Cornell Cooperative Extension's Lake Ontario Fruit Program and Lake Ontario Ag Consulting, LLC!  Located in Orleans County, this orchard field day will highlight new and existing products, chemistries, practices, technologies & equipment that shape the orchard industry today. The Western NY Fruit Grower Tour will again combine two past orchard tour events, the LOF Summer Fruit Tour and the Wayne County Fruit Grower Tour, giving industry members the opportunity to conveniently showcase their product offerings to ONE unified group at ONE time and place!

View 2nd Annual WNY Fruit Grower Tour Details


Scaffolds podcast

Many of you probably read Art Agnello's statewide tree fruit updates and recommendations newsletter, "Scaffolds". Dr. Monique Rivera is bringing it back, but in a new audio version. Episode one was recorded this week, and is now available for free online at

NYS Tree Decline Survey

Your answers could help find the solution to tree decline in the orchard.
NYS Tree Decline Survey

Save the Date! - Scroll down for Upcoming Events

Have you missed a meeting recently? Scroll down for available recordings or pdf links or visits our YouTube Channel

2024 Events:

18 Jun - Postponed WNY Bilingual Soil Health & Beneficial Fungi Meeting - Check back for future reschedule date!

20 Jun - 2024 Virtual Orchard Meetup Series 'Water Wisdom" Smart Watering: Practices for Irrigation Management - 7PM, Zoom

25 Jun - Virtual IPM Orchard Scout Training 2 - 1:30 - 3pm, Zoom

27 Jun - Tree Fruit & Small Fruit Twilight Meeting 3_4 - 6:30pm-8:30PM, Penn Yan

27 Jun - 2024 Virtual Orchard Meetup Series 'Water Wisdom" Water Wisdom Unplugged: Panelist Q&A - 7PM, Zoom

29 Jun - NYS Honeyberry Conference - 8:30am - 4:30pm, Mexico, Space is limited, register now!

16 July - Apple Social - 6-9 PM, LynOaken Farm Market & Winery, Medina.

25 Jul - Tree Fruit & Small Fruit Twilight Meeting 4_4 - 6:30pm-8:30PM, Mexico

31 July - Apple Social - 6-9 PM, VanAcker Farms, Williamson.

13 Aug - 2nd Annual WNY Fruit Grower Tour - Orleans County

17 Aug - Annual Hispanic Summer Tour - Orleans County, Details to follow!

Feb 4-5, 2025 - Western NY Fruit Conference - DoubleTree by Hilton Hotel, Rochester

Food Safety Virtual Office Hours

Cornell Institute of Food Safety "Virtual Office Hours", Tuesdays Noon to 1pm

Past recorded virtual office hours can be found on YouTube:

Webinar Recordings & Additional Meeting Materials

Check out the recordings of some recent webinars and/or conference materials from in person events: Recordings and Playlists are available at

2024 Virtual Orchard Meetup Series - Water Wisdom: 
1/4 - Trends In Water Availability
2/4 - The Role of Water In Tree Fruit Physiology & Quality
3/4 - Smart Watering: Practices for Irrigation Management

2024 8-12 mm Thinning Meeting

2024 Capital Region & Western NY Petal Fall Thinning Meeting

2024 Statewide Pink Meeting

2024 Cornell Statewide Frost Protection Webinar

2024 Winter Fruit Webinars playlist on the NYS IPM Program YouTube Channel

2nd Annual Lake Ontario Fruit Program's Winter Fruit Conference - 2024 pdfs

PACMAN Details and Resources, Meeting Recording Links below:
Developers Conference for Precision Crop Load Management of Apples Playlist - 2024
PACMAN Briefing - 2023

Pollinator Resouces

Now available Pollinator Resource Links

Meeting Recordings Now Available

Did you miss the recent meeting?  Check and see if we recorded it and added it to our website or Lake Ontario Fruit Program YouTube Channel.

Honeycrisp Meetup recordings available here.

Why are my trees growing so poorly? recording available here.

Additional Recorded Webinars listing with recording and resource link are available at|crops|apples|crop*38

New Publication on Growing Pawpaws

Are you a fan of pawpaws? These custardy fruits can be hard to come across, so this guide provides information on how to grow your own pawpaw from seed, and how to care for grafted seedlings. Pdf on growing now available.​|crops|unusual_fruit|crop*50

New Weed Management Technology Survey

Want to move away from herbicide reliance? Are you using novel technologies to manage weeds? We want to know about it to inform our weed science research. A team of weed scientists from University of California Davis, Oregon State University, and Cornell University are asking berry, tree fruit, tree nut, and vine crop growers to take 5 to 10 minutes and answer this short and anonymous survey. Weed Technology Survey link:

For more information on this survey please visit

Pollinator Webinar Series - Summer 2020

The Pollinator Webinar Series presented by Penn State cover bee health and pollination services.

Bloom Pesticides for Pollinator Health

A reference table created by Janet van Zoeren and Anna Wallis, is now available at|pests.