Navigation Links
Hydrocooling shows promise for reducing strawberry weight loss, bruising
Date:4/15/2010

GAINESVILLE, FLStrawberries are very fragile and highly susceptible to mechanical injury during commercial production. Growers interested in ways to increase profits and reduce product loss are seeking improved handling and temperature management techniques. Collaborative research from scientists from the Brazilian Agricultural Research CorporationEmbrapa and the University of Florida contains several findings that show promise to significantly improve commercial strawberry handling.

Because of their fragile nature, strawberries must be harvested when they are ripe to minimize bruising, a critical concern leading to product and revenue losses for growers. Bruising is caused by impact, compression, and vibration forces. Impact bruising results from a sudden sharp forcefor example when a fruit falls onto another fruit or onto a hard surface, or when an object strikes the fruit. Compression bruising occurs when tissue is subjected to a constant force such as during hand-harvest (finger pressure), or when the fruit is on the bottom layer of a container.

To replicate commercial handling conditions, the research team used forced-air or hydrocooling with three strawberry cultivars ('Chandler', 'Oso Grande', and 'Sweet Charlie') to reach pulp temperatures of 1 or 30C, then subjected the fruit to compression and impact forces. The fruit was subsequently evaluated for bruising; each berry was sliced through the center of the impact area and was considered to be bruised if damaged tissue was visible below the impact area.

Strawberries with a pulp temperature of 24C exhibited sensitivity to compression but greater resistance to impacts. As pulp temperature decreased, fruit were less susceptible to compression, as shown by up to 60% reduction in bruise volume. In contrast, strawberries at 1C pulp temperature had more severe impact bruising, with up to 93% larger bruise volume than at 24C, depending on the cultivar.

Strawberries also showed different susceptibility to impact bruises depending on the cooling method. Impacted fruit that were forced-air cooled had larger bruise volumes than those that were hydrocooled. The impact bruise volume for strawberries forced-air cooled to 1C was 29% larger than for fruit hydrocooled to 20C, 84% higher than those forced-air cooled to 20C, and 164% higher than those hydrocooled to 1C.

The results proved that strawberries had different responses to compression and impact forces based on pulp temperature. Fruit at low temperature were more resistant to compression, while fruit at higher temperatures were more resistant to impact. This finding translates to practical recommendations for commercial strawberry growers, suggesting that fruit bruising caused by compression may be minimized by harvesting and transporting early in the day when pulp temperatures are lowest.

According to the report, "there is potential for strawberries to be graded and packed on a packing line; however, impact bruising at transfer points must be minimized. In this scenario, the strawberries could be harvested into field lugs (two or three layers deep of fruit) and transported to the packing house. It would be more advantageous to use hydrocooling than forced-air cooling because hydrocooling cools fruit at a much faster rate."

The authors added that because incidence and severity of impact and compression bruises are temperature-dependent, strawberry growers should consider pulp temperature for harvest scheduling and for potential grading on a packing line. "Hydrocooling shows to rapidly cool strawberry fruit while reducing weight loss and bruising sensitivity," they concluded.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

Related biology news :

1. Global study shows health joins green as business strategy
2. New study shows rising water temperatures in US streams and rivers
3. Peregrine reports new study from Duke shows anti-HIV potential of targeting PS on cells
4. Study shows compulsive eating shares addictive biochemical mechanism with cocaine, heroin abuse
5. US women and minority scientists discouraged from pursuing STEM careers, national survey shows
6. A marine Mr. Mom: Male pipefish gives birth, but some are deadbeat dads, study shows
7. Study shows potential for using algae to produce human therapeutic proteins
8. Study shows woody plant encroachment has increased stream flow in the Edwards Plateau
9. New study shows teens who drink 100 percent fruit juice have more nutritious diets overall
10. An apple a day? Study shows soluble fiber boosts immune system
11. UAB study shows African-Americans have highest stroke rate, southerners more likely to die
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Hydrocooling shows promise for reducing strawberry weight loss, bruising
(Date:4/26/2016)... 2016 Research and Markets has ... Market 2016-2020"  report to their offering.  , ,     ... The analysts forecast the global multimodal biometrics market ... the period 2016-2020.  Multimodal biometrics is ... as the healthcare, BFSI, transportation, automotive, and government ...
(Date:4/13/2016)... physicians supporting Medicaid patients in Central Florida ... telehealth thanks to a new partnership with higi.   ... can routinely track key health measurements, such as blood ... they opt in, share them with IMPOWER clinicians through ... location at no cost. By leveraging this data, IMPOWER ...
(Date:3/22/2016)... India , March 22, 2016 /PRNewswire/ ... market research report "Electronic Sensors Market for Consumer ... Proximity, & Others), Application (Communication & IT, ... Geography - Global Forecast to 2022", published ... industry is expected to reach USD 26.76 ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... discussions on a range of subjects including policies, debt and ... Poloz. Speaking at a lecture to the Canadian ... to the country,s inflation target, which is set by both ... "In certain areas there needs to be ... why not sit down and address strategy together?" ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica ... in people with peritoneal or pleural mesothelioma. Their findings are the subject of a ... , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue of ...
(Date:6/23/2016)... 2016   Boston Biomedical , an industry ... to target cancer stemness pathways, announced that its ... Drug Designation from the U.S. Food and Drug ... including gastroesophageal junction (GEJ) cancer. Napabucasin is an ... cancer stemness pathways by targeting STAT3, and is ...
(Date:6/23/2016)... Houston Methodist Willowbrook Hospital has signed ... to serve as their official health care provider. ... will provide sponsorship support, athletic training services, and ... volunteers, athletes and families. "We are ... and to bring Houston Methodist quality services and ...
Breaking Biology Technology: