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IHC 2022 Angers – France



Carolina Torres, Rene Mogollon, and Jingi Yoo attended the last International Horticultural congress from ISHS at Angers, France. Our researchers had fruitful participation where they did two orals and three poster presentations.

Dr. Torres talked about how climate change and season’s weather variability have brought significant challenges to fruit production and supply chain management in many different parts of the world. She presented how we have described sunscald on pears where sunscalded tissue had significantly lower L and b* values and overall reflectance intensities at harvest, regardless of sunburn severity.

A novel protocol to assess sunscald risk level in ‘Granny Smith’ apple was presented by Dr. Mogollon. This new protocol uses hyperspectral images and is based on Chlorophyll and Carotenoid absorption wavelengths (430, 662, 454, and 549 nm). It is a potential non-destructive tool for estimating whole-apple relative sun exposure that can be used to sort apples according to sunburn symptoms, high sun scald risk, and different relative sun exposure.

Finally, Dr. Yoo showed the effectiveness of phytosqualane in controlling superficial scald and its effect on ‘D’Anjou’ fruit quality. Pear fruit treated with phytosqualane solution only had a superficial scald incidence of 10 %: meanwhile, the incidence in the control fruit was 100%.


Lab team attend ASHS 2022


Carolina Torres and Rene Mogollon have attended the ASHS 2022 annual conference in Chicago, Illinois.
Our lab members shared some of the results of this season’s research.
Dr. Torres talked about how packaging conditions majorly affect the development of lenticel breakdown (LBD) in apples. She showed the correlation between postharvest water chemistry (carbohydrate, metals and minerals content, pH, ORP, conductivity, temperature, turbidity, COD, and free chlorine) during packaging over LBD development in commercial fruit lots throughout the storage period.

The results showed phosphorus accumulation in the water positively correlated with high LBD incidences. Calcium, Boron, and Potassium may also be playing a role in the disorder’s expression. Finally, high free chlorine was not correlated with fruit with high LBD incidence.

On the other hand, Dr. Mogollon presented a novel way to obtain an early prediction of postharvest sun-stress disorders in Granny Smith apples. Using Hyperspectral images and Chlorophyll and Carotenoids related wavelength, he modeled the incidence of sunscald after 6 months of storage using data collected before symptoms were present. These results showed the feasibility of hyperspectral imagers for identifying sun-stressed fruit at harvest that may later develop sunscald symptoms during the cold chain.

Well done, team!
See you next year at the ASHS 2023 in Orlando, Fl.


Congratulation Marcella


Our dear master student has successfully defended her research project ‘POSTHARVEST SYSTEM’S FOR ORGANIC ‘HONEYCRISP’ AND ‘FUJI’ APPLES’, and now she is a new grad student.

Marcella joined the postharvest systems laboratory in January 2020 as a master’s student.

We wish you all the best in your new professional challenges.
See you on the road!

Pace’s 10th Annual Postharvest Academy


Carolina Torres gave a talk about Storage Technologies for Organic Apples at the 10th Annual Postharvest Academy organized by Pace international.

Other speakers at the event were Jessa Allen from USApples, Scott Christie, and Christian Aguilar from Pace international. This meeting was placed in Suncadia Resort in Cle Elum, WA.