Prestorage conditioning, diphenylamine improve condition of 'honeycrisp' apple

Mar 26, 2014

Since the introduction of 'Honeycrisp' apples in 1991, the variety has become a consumer favorite for its unusual texture and delicious flavor. Honeycrisp has increased in popularity with growers as well; Michigan, New York, and Washington boast significant numbers of 'Honeycrisp' orchards. As the growing area dedicated to the variety has grown, the need to find better methods for improving storage performance has become more important to growers. Because 'Honeycrisp' is very sensitive to low temperatures and can be damaged by controlled-atmosphere conditions, long-term storage of the apples can be challenging.

Carolina Contreras and Randy Beaudry from the Department of Horticulture at Michigan State University and Nihad Alsmairat from the Department of Horticulture and Crop Science at the University of Jordan published a study in HortScience that revealed some important information for producers. "Our work was conducted in two phases," Beaudry explained. "The first phase was designed to determine whether 'Honeycrisp' apples were susceptible to controlled-atmosphere injury, to determine the relative influence of O2 and CO2, and to identify a treatment combination that would reliably generate symptoms so that control measures could be subsequently evaluated." In the second phase, the scientists evaluated options for avoiding injury to 'Honeycrisp' during controlled-atmosphere storage. Fruit were conditioned at 3º C, 10º C, and 20º C for 5 days and then exposed to one of nine different storage treatments.

In the first experiment, 'Honeycrisp' exhibited a high sensitivity to both low oxygen and elevated CO2 levels. "We found that the controlled-atmospheres used induced injuries typical of those associated with CO2 (i.e., small brown lesions and associated lens-shaped cavities) and also larger dark brown lesions with often irregular margins," the authors said. "The extent of the injury was higher for those fruit in an atmosphere with elevated CO2 for each level of O2."

Subsequent experiments took place over 3 years, during which the researchers reproduced the controlled-atmosphere (CA) injury from the preliminary study with varied intensity. Although the researchers observed high variability between orchards and years, they found two treatments that effectively controlled the CA injury. "We found that the brown lesions in the cortex were completely suppressed by DPA application, even when the prestorage conditioning temperature was 3º C," Beaudry said. "The incidence of cavities ranged from 0.1% to 0.3% under the same DPA treatment. On the other hand, the most affected treatment was 3/3 followed by 3/0, 21/0, and 21/ 0 plus 1-MCP."

The authors noted that, while there is good progress toward determining optimal storage recommendations for 'Honeycrisp' additional studies are still warranted. "For instance, although the 7-day prestorage conditioning treatments provided some protection against the development of CA injury, shorter durations should be investigated to prevent quality loss resulting from excessive ripening, which could cause increased skin greasiness and undesirable flavor profile."

The study includes additional recommendations for handling 'Honeycrisp' in prestorage conditions.

Explore further: GMO mosquito plan sparks outcry in Florida

More information: The complete study and abstract are available on the ASHS HortScience electronic journal web site: hortsci.ashspublications.org/c… ent/49/1/76.abstract

add to favorites email to friend print save as pdf

Related Stories

Studies explore storage ideas for Anjou pears

Jan 31, 2014

Fresh Anjou pears, harvested in late summer from orchards in Oregon and Washington, will usually be available in supermarket produce departments through early spring of the following year. That's thanks to, ...

Inflatable 'scary dancers' chase birds from fruit

Dec 05, 2013

(Phys.org) —Those large, inflatable plastic characters that loom over used car lots have a new purpose: scaring away birds that cause hundreds of millions of dollars in damage to U.S. orchards and vineyards.

SnapDragon and RubyFrost are new apple varieties

Aug 02, 2013

Cornell has announced two new apple varieties developed in partnership with the New York Apple Growers (NYAG). They are SnapDragon and RubyFrost, and they have undergone a year of rigorous consumer testing ...

Recommended for you

'Tiger heavyweight' Nepal hosts anti-poaching summit

10 hours ago

Nepal's success in turning tiger-fearing villagers into their protectors has seen none of the endangered cats killed for almost three years, offering key lessons for an anti-poaching summit opening in Kathmandu ...

GMO mosquito plan sparks outcry in Florida

Jan 31, 2015

A British company's plan to unleash hordes of genetically modified mosquitoes in Florida to reduce the threat of dengue fever and other diseases has sparked an outcry from fearful residents.

Population genomics unveil seahorse domain

Jan 30, 2015

In a finding vital to effective species management, a team including City College of New York biologists has determined that the lined seahorse (Hippocampus erectus) is more a permanent resident of the we ...

Researchers develop new potato cultivar

Jan 30, 2015

Dakota Ruby is the name of a new potato cultivar developed by the NDSU potato breeding project and released by the North Dakota Agricultural Experiment Station. Dakota Ruby has bright red skin, stores well and is intended ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.