Source: UNIVERSITY OF FLORIDA submitted to NRP
QUALITY AND SAFETY OF FRESH-CUT VEGETABLES AND FRUITS
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
HATCH
Reporting Frequency
Annual
Accession No.
1015893
Grant No.
(N/A)
Cumulative Award Amt.
(N/A)
Proposal No.
(N/A)
Multistate No.
S-294
Project Start Date
Apr 27, 2018
Project End Date
Sep 30, 2022
Grant Year
(N/A)
Program Code
[(N/A)]- (N/A)
Recipient Organization
UNIVERSITY OF FLORIDA
G022 MCCARTY HALL
GAINESVILLE,FL 32611
Performing Department
Horticultural Science
Non Technical Summary
Postharvest losses of fresh-cut produce are difficult to estimate but given the highly perishable nature of fresh-cuts compared to intact produce, the retail value of fresh-cut produce losses and wastage at all levels may exceed $9-10 billion annually.The appearance, convenience, and generally high nutritive value of fresh-cut vegetables and fruits drive sales, but repeat sales is dependent upon assurance of its safety and the products having pleasing texture and flavor. The industry primarily relies on established technologies derived mainly from practical experience to maintain visual quality and shelf-life with less consideration of the quality characteristics that drive repeat sales such as good flavor retention, maintenance of an appealing texture (crispness, crunchiness), and increased microbial quality leading to extended shelf stability and food safety. Through interaction with the industry we know that current technologies, especially for fresh-cut fruits, do not provide the shelf stability needed to supply long distance domestic markets with optimum flavor quality.As a result of physiological and microbial deterioration occurring during storage and marketing of fresh produce, and especially fresh-cut produce, there is a continuing need to develop effective, less-damaging treatments for maintaining the sensory quality (appearance, flavor, texture), nutritional value, and food safety of fresh harvested produce (How, 1990). With over 200 different vegetable and fruit crops with potential for development as fresh-cut products, each with unique physiology and handling requirements, an integrated, scientific approach to research and development including microbiological interactions with these products is critically needed.The conditions on the cut surface of fresh-cut products, with the presence of water and compounds that can be used for nutrition, are ideal for growth of microbes. Unfortunately, as produce consumption has increased in the U.S. in recent years, so has the number of produce-related outbreaks of foodborne illness. About 24% of all foodborne illnesses from 2004 to 2013 were due to fresh produce (more than any other category; CSPI, 2015). The continuing nature of such produce-related outbreaks represents a threat to further increases in per capita consumption due to lowered confidence in the microbial safety of the product by the consuming public. Such outbreaks can also be very costly to growers, processors, shippers and restaurants.It is very difficult to ascertain the efficacy of control measures for food safety as there are no direct measures of the effectiveness of intervention strategies on the rate of occurrence of foodborne illness in the general population. Instead, model systems are used to test the effectiveness of intervention strategies at selected stages of the processing chain. The hope is that by identifying and implementing numerous control strategies along the processing chain that were found to be effective in model systems, that the resulting net risk reduction will effectively reduce the real risk of foodborne illness. There are a number of opportunities to address food safety concerns as part of this project. Quality and safety concerns often overlap. For example, efforts to reduce spoilage organisms should also impact pathogenic organisms, since conditions that support spoilage organism growth also support human pathogen survival/proliferation. Removing damaged produce prior to production will reduce the risks associated with pathogen colonization of wounds.In order to ascertain food safety risks involving fresh and fresh-cut produce, it is critical to be able to determine the survival and persistence of viable or infectious human pathogens under environmental conditions occurring in produce handling and processing facilities, on harvested crops, and on intact or fresh-cut products. Therefore, methods for detection and enumeration of target microbes, including bacteria and viruses, are of core relevancy to this project. Approaches for detection and enumeration of microbes on fresh produce can play an important role in mitigation of fresh produce-associated spoilage or foodborne disease, as well, providing decision makers with timely and actionable data, especially on the presence of human pathogens in these products (Brehm-Stecher et al., 2009). These data could help guide interventions such as: refusal of contaminated product from the field, cessation of processing for line or equipment sanitation, destruction of contaminated product held in inventory pending testing results, or product recall. Due to the relatively short shelf lives of most types of fresh and particularly fresh-cut produce, rapid methods for detection and enumeration are of special relevance to the goals of this work.Integration of physiological, pathological, food safety, and instrumental and sensory quality measurement concepts is essential for developing the most effective handling procedures and innovative, new technologies for maintaining quality and shelf stability, and safety of fresh-cut products. This multistate project is structured to fosterthecooperation and collaboration among AES, ARS and other scientists in multiple disciplines that is necessary to accomplish such outcomes. Much experimental work is needed to optimize and integrate new and emerging treatments in diverse fresh-cut products. This fact supports the proposed integrated approach of having parallel projects in different states and of focusing the research into specific areas of importance. Alternative and emerging technologies for maintaining the quality and shelf stability of fresh-cut produce are being introduced at a rate that often precludes thorough evaluation of instrumental and sensory quality attributes, and their impact on product nutritional value, microbial quality and food safety. To do so, a multidisciplinary approach as proposed hereinisneeded to optimize the new and emerging treatments.
Animal Health Component
70%
Research Effort Categories
Basic
10%
Applied
70%
Developmental
20%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
5011099102010%
5011199102010%
5011499102010%
5031099102010%
5031199102010%
5031499102010%
7011199100010%
7011499100010%
7121199110010%
7121499110010%
Knowledge Area
501 - New and Improved Food Processing Technologies; 712 - Protect Food from Contamination by Pathogenic Microorganisms, Parasites, and Naturally Occurring Toxins; 503 - Quality Maintenance in Storing and Marketing Food Products; 701 - Nutrient Composition of Food;

Subject Of Investigation
1499 - Vegetables, general/other; 1099 - Tropical/subtropical fruit, general/other; 1199 - Deciduous and small fruits, general/other;

Field Of Science
1100 - Bacteriology; 1000 - Biochemistry and biophysics; 1020 - Physiology;
Goals / Objectives
1. Evaluate methods of sampling and measuring flavor and nutrition of fresh-cut products to facilitate comparison to traditional shelf life factors. 2. Develop new strategies to improve and maintain inherent fresh-cut product quality and nutrition. 3. Improve understanding of physiological mechanisms that affect fresh-cut product quality. 4. Determine critical factors in controlled inoculation studies with human pathogens and surrogates that influence the outcome of quantitative microbial risk assessments. 5. Development and validation of novel diagnostic methods to determine presence of human pathogens and chemical hazards associated with fresh and fresh-cut products.
Project Methods
All produce will be appropriately prepared and cut under highly sanitary conditions at refrigerated temperatures where the processing area, tools, and gloved hands are appropriately sanitized and personnel wear proper clothing to protect cut produce from contamination. Standard sanitation procedures to be used in conducting experiments will be determined by consensus of the participants. Any post-cutting treatments and packaging will also be performed using good manufacturing practices. After treatment, fresh-cut products, with intact control samples, will be stored using appropriate refrigerated temperatures and durations depending on commodity, stage of maturity at harvest or upon treatment, and storage temperature of the intact produce prior to processing.Standard sensory and instrumental measures of flavor quality to be used in work encompassing the first three objectives will be developed by project members in CA, FL, and ARS-FL. Visual quality of fresh-cut products will be evaluated by applying standard hedonic scoring systems, reflectance color measurements, and spectrophotometric analysis of chlorophyll, anthocyanin, carotenoid, and phenolic pigments. Textural alterations will be analyzed using mechanical measurements of tissue firmness.Since apparent responses to temperature, ethylene, etc. can be strongly affected by different fresh-cut preparation procedures, certain basic preparation procedures such as slicing procedures, slice or chunk sizes, and sanitation methods will need to be agreed upon, especially by those participants working with the same or similar types of products. The participants will agree on standard anti-browning and texture stabilizing treatments for products being studied at different stations. Similarly, standard hedonic scoring systems and physical measurement methods for color and texture for each common product will be used as much as possible. Flavor-related factors will be measured upon sampling or removal from packages or storage containers after a standard, specified period of time at a specified temperature.

Progress 10/01/19 to 09/30/20

Outputs
Target Audience:Results of these studies were distributed to horticultural and other plant scientists through publication in peer-reviewed scholarly journals, presentations at state, national and international scientific conferences, and incorporation into course curricula, as well as through presentations to related industry audiences. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Brecht was an instructor in the extension workshop, "Fresh-Cut Products: The Science and Art of Quality and Safety," at UC Davis in September. Schneider, with Danyluk, Goodrich and Ritenour (all FL) conducted approximately 35 Produce Safety Alliance trainings on FSMA for industry and university professionals. The studies described have constituted the focus of graduate student projects as well as research contributed by postdocs, visiting scientists and support personnel. How have the results been disseminated to communities of interest?Publication in high-impact refereed journals and presentations at national and international conferences. Also presented to the fresh-cut industry (United Fresh Produce Association) during the S294 Annual Meetingand at the Fresh-cut Workshop at UC Davis. What do you plan to do during the next reporting period to accomplish the goals?Conduct quality evaluations comparing sensory data with physicochemical analyses with standard and novel instrumentation. Compare shelf life in terms of appearance, texture, nutritional value, and flavor, and determine interactions between volatile and non-volatile components of flavor. Evaluate the effects of chemical and physical treatments on visual quality to determine whether treatments are worth further study in terms of more complex physicochemical analyses and sensory evaluations during post-treatment storage periods at 1 to10°C depending on commodity and commercial practices. Determine the effects of wounding and heat stress on tissue antioxidative capacity and concentrations of bioactive components during storage of fresh-cut vegetables and fruits. Measure the levels of active oxygen species and other free radicals in response to fresh-cut processing and investigate how postharvest treatments such as MAP and heat can be used to enhance the plant antioxidant system in order to prevent the accumulation of those damaging compounds. Ethylene dependent and ethylene-independent wound and stress responses in fresh-cut vegetables (leafy greens) and fruits (banana) will be investigated by utilizing inhibitors of ethylene binding such as 1-MCP. Test various intervention strategies compared to standard commercial practices for effects on produce (i.e., sweetcorn and lettuce) quality and naturally occurring and inoculated microorganisms. Factors such as concentrations, treatment time, intensity, power strength, storage condition (temperature, atmosphere, duration, etc.), and synergistic interactions of sanitizers and/or intervention technologies will be evaluated. Interventions may include hot water immersion, ClO2 and O3 gas, chemical sanitizers (acids, chlorine, peroxiacetic acid, and hydrogen peroxide) combined with surfactants and other treatments (hurdle technology). Continue investigating potential for using phenolic metabolism inhibitors to reduce or eliminate the development of pink rib in lettuce, which can be a serious problem for fresh-cut processors.

Impacts
What was accomplished under these goals? OBJ. 1. Nothing to report. OBJ 2. J.K. Brecht, S. Stahl, C. Abrahan, and Y. Xie (FL), Anne Plotto, Elizabeth A. Baldwin and Jinhe Bai (ARS-FL) Overcoming limitations for processing riper mango fruit for fresh-cut mango. We developed recommendations for minimum firmness for fresh-cut processing of three different mango cultivars (Tommy Atkins, Keitt, Kent), with and without anti-browning and firming additives and MAP. A report was submitted to the sponsor (National Mango Board), presentatiions were made at the FSHS and ASHS meetings; a publication appeared in the Proceedings of the FSHS and a publication has been accepted by HortTechnology (2021). J.K. Brecht and Y. Xie (FL) and Sunny Luo and Ellen Bornhorst (ARS-MD) Retrofitting refrigerated retail display cases to improve temperature management and maintain quality of fresh-cut leafy greens. We showed that the lower temperatures in enclosed refrigerated retail display cases maintain higher quality of leafy greens. An approximately 3 degree C temperature difference before versus after display case retrofitting resulted in improved quality maintentance of baby spinach, spring mix, and Romaine lettuce; we also demonstrated lower microbiological populations on chopped Romaine lettuce. We presented the results at the ASHS Annual meeting and the ISHS Fresh-cut Symposium; a publication is in press in Acta Horticulturae and a publication has been accepted by J. Food Engineering (2021). Belisle, C.E., S.A. Sargent, and J.K. Brecht. (FL) Trimming sweetcorn to improve quality maintenance. We demonstrated how trimming shanks better maintains total sugars and water content and reduces kernel denting of sweetcorn kernels during storage. A presentatiion was made at the FSHS meeting, and a publication appeared in the Proceeding of the FSHS. OBJ. 3. Belisle, C.E., S.A. Sargent, and G. Sandoya (FL) Reducing pink rib, a stress-induced disorder in lettuce. We are developing rapid quality assessments for breeding line selections and applying chemical interventions to reduce pink rib, a common physiological disorder of lettuce. OBJ. 4. De J., Bertoldi B., Pabst, C.R., Baker C.A., Brecht J.K., Sargent S.A., and Schneider K.R. (FL) Increasing the marketability of fresh sweetcorn by optimizing postharvest sanitation and cooling. We determined the required concentrations of free chlorine in hydrocooling systems in order to reduce microbial load on whole sweetcorn. OBJ. 5. Nothing to report.,

Publications

  • Type: Book Chapters Status: Published Year Published: 2020 Citation: Brecht, J.K. 2020. Fresh-cut mango: Requirements and recommendations, p. 495-500. In: R. Beaudry and M.I. Gil (eds.). Controlled and Modified Atmosphere for Fresh and Fresh-Cut Produce. Academic
  • Type: Book Chapters Status: Published Year Published: 2020 Citation: Brecht, J.K. 2020. Fresh-cut sweetpotato: Requirements and recommendations, p. 629-633. In: R. Beaudry and M.I. Gil (eds.). Controlled and Modified Atmosphere for Fresh and Fresh-Cut Produce. Academic
  • Type: Book Chapters Status: Published Year Published: 2020 Citation: Brecht, J.K., E. Pliakoni, and K. Batziakis. 2020. The impact of temperature on atmosphere requirements and effects: The limits of design and utility for CA/MA/MAP, p. 147-166. In: R. Beaudry and M.I. Gil (eds.). Controlled and Modified Atmosphere for Fresh and Fresh-Cut Produce. Academic
  • Type: Book Chapters Status: Published Year Published: 2020 Citation: Baldwin, E.A. and J.K. Brecht. 2020. Advances in the use of barrier coatings and additives in the preservation of fresh horticultural produce, p. 91-115. In: C. Watkins (ed.). Advances in Postharvest Management of Horticultural Produce. Burleigh Dodds, Cambridge, U.K.
  • Type: Book Chapters Status: Published Year Published: 2020 Citation: Brecht, J.K., I. Uysal, M. C. N. Nunes, J. P. Emond, S. Mercier, and U. McCarthy. 2020. Smart distribution to maintain shelf-life of horticultural produce, p. 409-432. In: C. Watkins (ed.). Advances in Postharvest Management of Horticultural Produce. Burleigh Dodds, Cambridge, U.K.
  • Type: Journal Articles Status: Published Year Published: 2020 Citation: de Frias J.A., Y. Luo, B. Zhou, B. Zhang, D.T. Ingram, K. Vorst, J.K. Brecht, and J. Stommel. 2020. Effect of door opening frequency and duration of an enclosed refrigerated display case on product temperatures and energy consumption. Food Control 111:107044 8 p. https://doi.org/10.1016/j.foodcont.2019.107044
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Belisle, C. (presenter), G.V. Sandoya, S.A. Sargent, and J. K. Brecht. 2019. Developing a methodology to screen Lactuca sativa cultivars and breeding lines to predict shelf life potential. Florida State Horticultural Society Annual Meeting, Orlando, FL
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Bertoldi, B. (Presenter), J. De, C. Baker, C. Pabst, A. Gutierrez and K.R. Schneider. 2019. Determining water quality and bacterial load on tomatoes in flume tanks from Florida packinghouses. International Assoc. of Food Protection, Louisville, KY
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Brecht, J.K. (Presenter). 2019. Freshcut Quality Issues regarding Cell Integrity, Translucency & Juice Leakage. FreshCut Products: Maintaining Quality and Safety Workshop, Univ. of Calif., Davis, CA (extension presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Brecht, J.K. (Presenter). 2019. Modified Atmospheres: Benefits and Risks to Freshcut Produce. FreshCut Products: Maintaining Quality and Safety Workshop, Univ. of Calif., Davis, CA (extension presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Brecht, J.K. (Presenter). 2019. Transportation and Distribution Issues. FreshCut Products: Maintaining Quality and Safety Workshop, Univ. of Calif., Davis, CA (extension presentation)


Progress 10/01/18 to 09/30/19

Outputs
Target Audience:Results of these studies were distributed to horticultural and other plant scientists through publication in peer-reviewed scholarly journals, presentations at national/international scientific conferences, and incorporation into course curricula, as well as through presentations to related industry audiences. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Brecht was an instructor in the extension workshop, "Fresh-Cut Products: The Science and Art of Quality and Safety," at UC Davis in September. Schneider, with Danyluk, Goodrich and Ritenour (all FL) conducted approximately 35 Produce Safety Alliance trainings on FSMA for industry and university professionals. Sargent, Ritenour, and Liu conducted a postharvest demonstration program on cooling fresh produce at the Florida AgExpo at the University of FloridaGulf Coast Research & Education Center in November. The studies described have constituted the focus of graduate student projects as well as research contributed by postdocs, visiting scientists and support personnel. How have the results been disseminated to communities of interest?Publication in high-impact refereed journals and presentations at national and international conferences. Also presented to the fresh-cut industry at the United Fresh Produce Association convention and at the Fresh-cut Workshop at UC Davis. What do you plan to do during the next reporting period to accomplish the goals?Conduct quality evaluations comparing sensory data with physicochemical analyses with standard and novel instrumentation. Compare shelf life in terms of appearance, texture, nutritional value, and flavor, and determine interactions between volatile and non-volatile components of flavor. Evaluate the effects of chemical and physical treatments on visual quality to determine whether treatments are worth furtherstudy in terms of more complex physicochemical analyses and sensory evaluations during post-treatment storage periods at 1 to10°C depending on commodity and commercial practices. Determine the effects of wounding and heat stress on tissue antioxidative capacity and concentrations of bioactive components during storage of fresh-cut vegetables and fruits. Measure the levels of active oxygen species and other free radicals in response to fresh-cut processing and investigate how postharvest treatments such as MAP and heat can be used to enhance the plant antioxidant system in order to prevent the accumulation of those damaging compounds. Ethylene dependent and ethylene-independent wound and stress responses in fresh-cut vegetables (leafy greens) and fruits (banana) will be investigated by utilizing inhibitors of ethylene binding such as 1-MCP. Test various intervention strategies compared to standard commercial practices for effects on produce (i.e., sweetcorn) quality and naturally occurring and inoculated microorganisms. Factors such as concentrations, treatment time, intensity, power strength, storage condition (temperature, atmosphere, duration, etc.), and synergistic interactions of sanitizers and/or intervention technologies will be evaluated. Interventions may include hot water immersion, ClO2 and O3 gas, chemical sanitizers (acids, chlorine, peroxiacetic acid, and hydrogen peroxide) combined with surfactants and other treatments (hurdle technology). Continue investigating potential for reducing or eliminating the development of pink rib in lettuce, which can be a serious problem with fresh-cut processors.

Impacts
What was accomplished under these goals? OBJ. 1. Nothing to report. OBJ. 2. J.K. Brecht, S. Stahl, C. Abrahan, and Y. Xie (FL), Anne Plotto, Elizabeth A. Baldwin and Jinhe Bai (ARS-FL) Overcoming limitations for processing riper mango fruit for fresh-cut mango. We developed recommendations for minimum firmness for processing different cultivars, with and without additves and MAP. J.K. Brecht and Y. Xie (FL) and Sunny Luo and Ellen Bornhorst (ARS-MD) We showed that the lower temperatures in enclosed refrigerated retail display cases maintain higher quality of leafy greens. An approximately 3 degree C temperature difference before versus after display case retrofitting resulted in improved quality maintentance of baby spinach, spring mix and Romaine lettuce, and also demonstrated lower microbiological populations on chopped Romaine lettuce. S.A. Sargent, C. Theodore, A.D. Berry, and L. Zotarelli (FL) Quality evaluation of commercial broccoli cultivars and breeding selections for potential winter production in north Florida (part of East Coast Broccoli Project) was done. There were inherent differences between cultivars, but cooling with slush ice or hydrocooling did not result in differences in quality changes during storage; plastic film overwrap was effective in reducing water loss during storage.Samples from broccoli storage regimes were analyzed for nutritional content at Univ. of Tennessee in Dr. Carl Sams' laboratory. Belisle, C.E., S.A. Sargent, and J.K. Brecht. (FL) We demonstrated how trimming shanks better maintains total sugars and water content of sweetcorn kernels during storage. Sargent, S.A., A. Berry, D. Dinkins, W. Mussoline, P. Fletcher. We began evaluation of a purple-fleshed sweetpotato with potential as a high-value crop for Florida growers. We are testing effects of curing regime and harvest time on anthocyanin content and other quality factors during storage at 10C. OBJ. 3. Belisle, C.E., S.A. Sargent, and G. Sandoya(FL) We are developing rapid quality assessments for breeding line selections and applying chemical interventions to reduce pink rib, a common physiological disorder of lettuce. OBJ. 4. De J., Bertoldi B., Pabst, C.R., Baker C.A., Brecht J.K., Sargent S.A., and Schneider K.R. (FL)We determined the required concentrations of free chlorine in hydrocooling systems in order to reduce microbial load onwhole sweetcorn. OBJ. 5. Nothing to report.

Publications

  • Type: Book Chapters Status: Awaiting Publication Year Published: 2019 Citation: Brecht, J.K., I. Uysal, M. C. N. Nunes, J. P. Emond, S. Mercier, and U. McCarthy. 2020. Smart distribution to maintain shelf-life of horticultural produce, p. 409-432. In: C. Watkins (ed.). Advances in Postharvest Management of Horticultural Produce. Burleigh Dodds, Cambridge, U.K. (in press)
  • Type: Journal Articles Status: Published Year Published: 2019 Citation: De, J., A. Sreedharan, Y. Li, A. Gutierre, J.K. Brecht, S.A. Sargent, and K.R. Schneider. 2019. Comparing the efficacy of postharvest cooling methods to enhance fruit quality and reduce Salmonella in artificially inoculated southern highbush blueberry. HortTechnology 29:314-319.
  • Type: Journal Articles Status: Published Year Published: 2019 Citation: Wang, L., E.A. Baldwin, W. Luo, W. Zhao, J. Brecht, and J. Bai. 2019. Key tomato volatile compounds during postharvest ripening in response to chilling and pre-chilling heat treatments. Postharv. Biol. Technol. 154:11-20.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Belisle, C.E. (Presenter), S.A. Sargent, and J.K. Brecht. 2018. Trimming sweetcorn shanks better maintains total sugars and water content of kernels during storage. Proc. Fla. State Hort. Soc. 131:189-192.
  • Type: Journal Articles Status: Published Year Published: 2019 Citation: Bardsley, C.A., L.N. Truitt, R.C. Pfunter, M.D. Danyluk, S.L. Rideout, L.K. Shawn. 2029. Growth and survival of Listeria monocytogenes and Salmonella on whole and sliced cucumbers. J. Food. Prot. 82:301-309.
  • Type: Journal Articles Status: Awaiting Publication Year Published: 2019 Citation: de Frias J.A., Y. Luo, B. Zhou, B. Zhang, D.T. Ingram, K. Vorst, J.K. Brecht, and J. Stommel. 2020. Effect of door opening frequency and duration of an enclosed refrigerated display case on product temperatures and energy consumption. Food Control 111, 107044. https://doi.org/10.1016/j.foodcont.2019.107044
  • Type: Other Status: Published Year Published: 2019 Citation: Plotto, A., J.K. Brecht, J. Bai, E. Baldwin, E. Branca, D. Wood., C. Abrahan, S. Stahl, and Y. Xie. 2019. Overcoming limitations for processing riper mango fruit for freshcut mango. Final Report to the National Mango Board.
  • Type: Book Chapters Status: Awaiting Publication Year Published: 2019 Citation: Brecht, J.K., E. Pliakoni, and K. Batziakias. 2020. The impact of temperature on atmosphere requirements and effects: The limits of design and utility for CA/MA/MAP, pp. 147-166. In: R. Beaudry and M.I. Gil (eds.). Controlled and Modified Atmospheres for Fresh and Fresh-Cut Produce. Academic (in press)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: J.K. Brecht (Keynote Presenter). 2019. The physiological basis of freshcut fruit and vegetable differences. ISHS IV International Conference on Fresh-Cut Produce, Tian, China (keynote presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Xie, Y., J.K. Brecht (Presenter), C. Abrahan, Y. Luo, and E.R. Bornhorst. 2019. Minimizing quality deterioration of freshcut baby spinach by retrofitting refrigerated retail display cases with doors. IV International Conference on Fresh-Cut Produce, Tian, China (e-poster)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Brecht, J.K. (Presenter). 2019. Freshcut Quality Issues regarding Cell Integrity, Translucency & Juice Leakage. FreshCut Products: Maintaining Quality and Safety Workshop, UC, Davis (extension presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Brecht, J.K. (Presenter). 2019. Modified Atmospheres: Benefits and Risks to Freshcut Produce. FreshCut Products: Maintaining Quality and Safety Workshop, UC, Davis (extension presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Brecht, J.K. (Presenter). 2019. Transportation and Distribution Issues. FreshCut Products: Maintaining Quality and Safety Workshop, UC, Davis (extension presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: De, J. (Presenter), Bertoldi B., Pabst, C.R., Baker C.A., Brecht J.K., Sargent S.A., and Schneider K.R. 2019. Comparing efficacy of hydrocooling with different concentrations of free chlorine in reducing microbial load from whole corn. IAFP-2019. Louisville, Kentucky. Poster # P1-122.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: De J. (Presenter), Bertoldi B., Pabst, C.R., Baker C.A., Gutierrez A., Sargent S.A., and Schneider K.R. 2019. Evaluation of hydrocooling with two different sanitizers in reducing microbial load from whole corn and their shelf life. IAFP-2019. Louisville, Kentucky. Poster # P1-119.
  • Type: Book Chapters Status: Awaiting Publication Year Published: 2019 Citation: Brecht, J.K. 2020. Fresh and fresh-cut sweetpotato: Requirements and recommendations, pp. 629-633. In: R. Beaudry and M.I. Gil (eds.). Controlled and Modified Atmosphere for Fresh and Fresh-Cut Produce. Academic (in press)
  • Type: Book Chapters Status: Awaiting Publication Year Published: 2019 Citation: Brecht, J.K. 2020. Fresh-cut mango: Requirements and recommendations, pp. 495-500. In: R. Beaudry and M.I. Gil (eds.). Controlled and Modified Atmosphere for Fresh and Fresh-Cut Produce. Academic
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Theodore, C. (Presenter), S.A. Sargent, J.K. Brecht, and L. Zotarelli. 2019. Cooling method affects postharvest quality of new breeding lines and commercial broccoli cultivars in Florida. Florida State Horticultural Society Annual Meeting.
  • Type: Books Status: Published Year Published: 2018 Citation: Schneider, K.R., D.L. Archer, R. Goodrich Schneider, G.L. Baker, M.D. Danyluk, and C. Thomas. 2018. The Food Recall Manual (Version 2). University of Florida, IFAS Press, Gainesville, FL.
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Tokarskyy, O., J. De, M.K. Fatica, J. Brecht, and K. Schneider. 2018. Survival of Escherichia coli O157:H7 and Salmonella on bruised and unbruised tomatoes from three ripeness stages at two temperatures. J. Food Prot. 81:2028-2033.
  • Type: Journal Articles Status: Published Year Published: 2019 Citation: Tokarskyy, O. and K.R. Schneider. 2019. Influence of temperature, humidity, and diluent type on survival of Salmonella spp. on the surface of raw tomatoes. Potravinarstvo. 13(1):325-330. doi: https://doi.org/10.5219/1121
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: De, J., Y. Li, A. Sreedharan, R. Goodrich Schneider, A. Gutierrez, M. Jubair, M.D. Danyluk, K.R. Schneider. 2018. A three-year survey of Florida packinghouses to determine microbial loads on pre- and post-processed tomatoes. Food Control 86:383-388.
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Gurtler, J.B, N.A. Harlee, A.M. Smelser and K.R. Schneider. 2018. Salmonella enterica contamination of market fresh tomatoes: A review. J. Food Protect. 81(7):11931213. doi:10.4315/0362-028X.JFP-17-395.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: De, J. (Presenter), B. Bertoldi, C. Pabst, C. Baker, A. Gutierrez, S. Sargent and K.R. Schneider. 2019. Evaluation of hydrocooling with two different sanitizers in reducing microbial load from whole corn and their shelf life. IAFP annual meeting, Louisville, KY. July 21-24.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Bertoldi, B. (Presenter), J. De, C. Baker, C. Pabst, A. Gutierrez and K.R. Schneider. 2019. Determining water quality and bacterial load on tomatoes in flume tanks from Florida packinghouses. IAFP annual meeting, Louisville, KY. July 21-24.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Danyluk, M.D. (Presenter), R. Goodrich Schneider, A. Harder, K. Schneider, D. Treadwell, A. Jackson-Davis, K. Gibson, A. Fouladkhah, M. Harrison, J. Harrison, W. Hurst, A. Mohan, M. Newman, P. Rentfrow, P. Vijaykumar, T. Woods, A. Adhikari, K. Fontenot, J. Silva, T. Kim, B. Chapman, E. Gutierrez-Rodriguez, D. Ducharme, D. Green, L.-A. Jaykus, C. Gunter, J. Levine, C. Stevenson, D. Jaroni, R. Jadeja, L. Ma, W. McGlynn, L. Feliciano Orellana, M. Plaza, J. Northcutt, F. Critzer, A. Wszelaki, T.M. Taylor, G. Acuff, J. Anciso, A. Castillo, L. Strawn, R. Boyer, A. Vallotton, R. Williams, K. Sarjeant, M. Valesco, M. Mesh, and R. McReynolds. 2018. A Southern Training, Education, Extension, Outreach, and Technical Assistance Center to Enhance Produce Safety. 2018 Food Safety Outreach Program Project Directors Meeting. p. 14-15.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Krug, M. (Presenter), K. Schneider, M. Danyluk, R. Goodrich Schneider, T. Chapin, A. Harder, A. Jackson-Davis, L. Kassama, D. Chembezi, E. Myles, A. Philyaw-Perez, K. Woods, C. Carter, J. Northcutt, K. Baker, K. Sargeant, M. Harrison, J. Harrison, A. Mohan, P. Vijayakumar, M. Newman, A. Adhikari, K. Fontenot, C. Graham, J. Silva, C. Gunter, E. Gutierrez-Rodriguez, B. Chapman, P. Tripp, R. Jadeja, D. Jaroni, L. Feliciano Orellana, M. Plaza, A. Wszelaki, M. Morgan. A. Fouladkhan, R. Fleming, T.M. Taylor, A. Castillo, J. Masabni, B. Vaughn, F. Malekian, L. Strawn, A. Vallotton, and R. Williams. 2019. A Southern training, education, extension, outreach, and technical assistance center to enhance produce safety. Southeast Regional Fruit and Vegetable Conference, Savannah, GA, p. 5-6.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Schneider, K.R. (Presenter), M.D. Danyluk, R. Goodrich Schneider, T. Chapin, A. Harder, A. Jackson-Davis, L. Kassama, D. Chembezi, E. Myles, A. Philyaw-Perez, K. Woods, C. Carter, J. Northcutt, K. Baker, K. Sarjeant, M. Harrison, J. Harrison, A. Mohan, P. Vijayakumar, M. Newman, A. Adhikari, K. Fontenot, C. Graham, J. Silva, C. Gunter, E. Gutierrez-Rodriguez, B. Chapman, P. Tripp, R. Jadeja, D. Jaroni, l. Feliciano Orellana, M. Plaza, A. Wszelaki, M. Morgan, A. Fouladkhah, R. Fleming, T.M. Taylor, A. Castillo, J. Masabni, B. Vaughn, F. Malekian, L. Strawn, A. Vallotton, and R. Williams. Southern Regional Center for Food Safety Training, Outreach, and Technical Assistance. 2019 National Consortium for Produce Safety Program Development, NASDA, Orlando, FL, p.2-3.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Danyluk, M.D. (Presenter), R. Goodrich Schneider, A. Harder, K. Schneider, D. Treadwell, A. Jackson-Davis, K. Gibson, A. Fouladkhah, M. Harrison, J. Harrison, W. Hurst, A. Mohan, M. Newman, P. Rentfrow, P. Vijaykumar, T. Woods, A. Adhikari, K. Fontenot, J. Silva, T. Kim, B. Chapman, E. Gutierrez-Rodriguez, D. Ducharme, D. Green, L.-A. Jaykus, C. Gunter, J. Levine, C. Stevenson, D. Jaroni, R. Jadeja, L. Ma, W. McGlynn, L. Feliciano Orellana, M. Plaza, J. Northcutt, F. Critzer, A. Wszelaki, T.M. Taylor, G. Acuff, J. Anciso, A. Castillo, L. Strawn, R. Boyer, A. Vallotton, R. Williams, K. Sarjeant, M. Valesco, M. Mesh, and R. McReynolds. 2018. A Southern training, education, extension, outreach, and technical assistance center to enhance produce safety. Southern Region Integrated Produce Safety Conference. p. 21-22.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Belisle, C. (presenter), G.V. Sandoya, S.A. Sargent, and J. K. Brecht. 2019. Developing a methodology to screen Lactuca sativa cultivars and breeding lines to predict shelf life potential. Florida State Horticulture Society. Annual Meeting.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Theodore, C. (Presenter), S.A. Sargent, J.K. Brecht, and L. Zotarelli. 2019. E?ect of cooling methods on postharvest quality of commercial broccoli cultivars grown in Florida. HortScience 54:(9) S120-121. Meeting Abstract. Amer. Soc. Hort. Sci. Annual Meeting, Las Vegas.
  • Type: Books Status: Published Year Published: 2019 Citation: Brecht, J.K., S.A. Sargent, P.E. Brecht, J. Saenz, and L. Rodowick. 2019. J.K. Brecht (ed.). Protecting Perishable Foods During Transport by Truck or Rail. University of Florida and USDA AMS, Gainesville, Fla., HS1328. 204 p.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Belisle, C.E. (Presenter), Kim, J., Sargent, S.A., Brecht, J.K., and Sandoya, G.V. 2019. Mitigating pink discoloration in lettuce. Everglades Research Education Center Open House. [Poster]
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Belisle, C.E. (Presenter), Kim, J., Sargent, S.A., Brecht, J.K., and Sandoya, G.V. 2018. Reducing pink rib, a stress-induced disorder in lettuce. Plant Science Symposium, Univ. of Florida, Gainesville [Poster]


Progress 04/27/18 to 09/30/18

Outputs
Target Audience:Results of these studies were distributed to horticultural and other plant scientists through publication in peer-reviewed scholarly journals, presentations at national/international scientific conferences, and incorporation into course curricula, as well as through presentations to related industry audiences. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Brecht was an instructor in the extension workshop, "Fresh?Cut Products: The Science and Art of Quality and Safety," at UC Davis in September. Schneider, with Danyluk, Goodrich and Ritenour (all FL) conducted 35 Produce Safety Alliance trainings on FSMA for industry and university professionals. The studies described have constituted the focus of graduate student projects as well as research contributed by postdocs, visiting scientists and support personnel. How have the results been disseminated to communities of interest?Publication in high-impact refereed journals and presentations at national and international conferences. Also presented to the fresh-cut industry at the United Fresh Produce Association convention and at the Fresh-cut Workshop at UC Davis. What do you plan to do during the next reporting period to accomplish the goals?Conduct quality evaluations comparing sensory data with physicochemical analyseswith standard and novel instrumentation. Compare shelf life in terms of appearance, texture, nutritional value, and flavor, and determine interactions between volatile and non-volatile components of flavor. Evaluate the effects of chemical and physical treatments on visual quality to determine whether treatments are worth further study in terms of more complex physicochemical analyses and sensory evaluations during post-treatment storage periods at 1 to10°C depending on commodity and commercial practices. Determine the effects of wounding and heat stress on tissue antioxidative capacity and concentrations of bioactive components during storage of fresh-cut vegetables and fruits. Measure the levels of active oxygen species and other free radicals in response to fresh-cut processing and investigate how postharvest treatments such as MAP and heat can be used to enhance the plant antioxidant system in order to prevent the accumulation of those damaging compounds. Ethylene-dependent and ethylene-independent wound responses in fresh-cut vegetables and fruits will be investigated by utilizing inhibitors of ethylene binding such as 1-MCP. Test various intervention strategies compared to standard commercial practices for effects on produce quality and naturally occurring and inoculated microorganisms. Factors such as concentrations, treatment time, intensity, power strength, storage condition (temperature, atmosphere, duration, etc.), and synergistic interactions of sanitizers and/or intervention technologies will be evaluated. Interventions may include hot water immersion, ClO2 and O3 gas, chemical sanitizers (acids, chlorine, peroxiacetic acid, and hydrogen peroxide) combined with surfactants and other treatments (hurdle technology).

Impacts
What was accomplished under these goals? 1. Optimum sanitizer levels determined for prevention of Salmonella cross-contamination of mature round tomatoes in a laboratory model flume system. 2. Sensory quality of fresh-cut mango at the consumer level documented through a full year in three locations. 3. Conducted a three year study examining the water quality of post harvest washing techniques (Florida, New Jersey and Maryland). OBJ. 2 J.K. Brecht and K. Cordasco (FL), Carlos Crisosto and Gayle Ullrich Crisosto (CA), Elizabeth A. Baldwin and Anne Plotto (ARS-FL) Fresh-cut mangos as a value-added product Fresh-cut mango available at retail is of poor quality due to the fruit being processed too early in ripening. J.K. Brecht, S. Stahl, C. Abrahan, and Y. Xie (FL), Anne Plotto, Elizabeth A. Baldwin and Jinhe Bai (ARS-FL) Overcoming limitations for processing riper mango fruit for fresh-cut mango In progress; developing recommendations for minimum firmness for processing different cultivars, with and without additves and MAP. J.K. Brecht and Y. Xie (FL) and Sunny Luo and Ellen Bornhorst (ARS-MD) Do the lower temperatures in enclosed refrigerated retail display cases maintain higher quality of leafy greens? In progress; approximately 3C temperature difference between open and closed displays for 12-24 h has not resulted in measurable differences in baby spinach physical, compositional, sensory or microbiological quality. J. De, A. Sreedharan, Y. Li, A. Gutierrez, S. Sargent, J.Brecht, K.R. Schneider (FL) Comparison of forced-air cooling and hydrocooling on the microbial quality control of Florida blueberries Hydrocooling with sanitizer had no deleterious effect on berry quality; reduced microbial counts; did not effect shelf life. Some cultivars may be susceptible to splitting during hydrocooling. J. De, B. Bertoldi, A. Gutierrez, M. Jubair, S. Sargent, J. Brecht, K.R. Schneider (FL) Effect of postharvest cooling methods on the microbial quality and storage of Florida peaches Hydrocooling with sanitizer had no deleterious effect on peach quality; had lower microbial counts, but did not effect shelf life. S.A. Sargent, J.K. Brecht, M. Makani, and A. Berry (FL) Comparison of forced-air cooling and hydrocooling on the quality of Florida blueberries Partial forced-air cooling on the day of harvest followed by overnight cold storage, then packing and completion of cooling the following day resulted in similar quality as blueberries packed and completely forced-air cooled on the day of harvest. S.A. Sargent, J.K. Brecht, M. Makani, and A. Berry (FL) Effect of postharvest cooling methods on the quality of Florida peaches Florida peaches are typically room cooled overnight in cold storage before being packed and cooling completed the following day. Hydrocooling peaches in field bins the day of harvest was equally as effective as the room plus forced-air cooling procedure in maintaining storage quality, while adding a sanitation step on the day of harvest. S.A. Sargent, J.K. Brecht, and A. Berry (FL) Hydrocooling, sanitation and packing efficacy of commercial Florida sweetcorn In progress; commercial hydrocooling operations were monitored for cooling efficiency and water quality. Trimming the shank end shows promise for facilitating packing without compromising quality and shelf life. S.A. Sargent, N.A. Razali, and A.D. Berry (FL) Storage temperature and coatings affect postharvest quality of red-fleshed pitaya (dragon fruit) ¾ red maturity stage is recommended to extend shelf life until 10 days of storage at 20 °C. Carnauba coated pitaya had less shriveling and retained firmness, thus the storage life may be extended for 15 days at 7 °C with 85% RH. 1 °C maintained the quality of pitaya by preventing fungal infection at the stem end and controlling anthracnose disease, resulting extended storage life until 20 days of storage. S.A. Sargent, C. Theodore, and A.D. Berry (FL) Quality evaluation of commercial broccoli cultivars and breeding selections for potential winter production in north Florida (part of East Coast Broccoli Project) In progress; two commercial cultivars and one breeding line will be studied in 2018 by cooling with slush ice or hydrocooling and storage with or without plastic film overwrap. S.A. Sargent, A.D. Berry, C. Belisle and S. Rafique (FL) Postharvest quality of selected Asian vegetables: Hydrocooling and shipping container Hydrocooling bitter melon and long bean reduced moisture loss compared to room cooling, resulting in almost doubling of postharvest life. OBJ. 3 S.A. Sargent, C. Belisle G. Sandoya, J.I. Kim, J.K. Brecht (FL) Quality evaluation of breeding lines from the University of Florida lettuce breeding program and potential of reducing pink rib In progress; preliminary tests were conducted to evaluate progression of pink rib in romaine lettuce and pinking disorder in endive and escarole. OBJ. 4 Schneider, De, Sreedharan, Gutierrez, Li, Jubair (FL) Microbial evaluation of preprocessed and postprocessed tomatoes from Florida packinghouses Conducted a three year study examining the water quality of post harvest washing techniques (Florida, New Jersey and Maryland)

Publications

  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Underthun, K., J. De, A. Gutierrez, R. Silverberg, and K.R. Schneider 2017 Survival of Salmonella and Escherichia coli in two different soil types at Various moisture levels and temperatures. J. Food Protect. 81(1) 150-157
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: �eki�, S.K., J. De, M. Jubair and K.R. Schneider 2017 Persistence of indigenous Escherichia coli in manure and manure-amended soil J. Food Protect. 80(9) 1562-15473
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Sreedharan, A., Li, Y., De, J., Gutierrez, A., Silverberg, R. and Schneider, K.R. 2017 Determination of optimum sanitizer levels for prevention of Salmonella cross-contamination of mature Round tomatoes in a laboratory model flume system J. Food Protect. 80(9) 1436-1442
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Schneider, K.R., De, J., Li, Y., Sreedharan, A., Goodrich Schneider, R., Danyluk, M.D., Pahl, D.M, Walsh, C.S., Todd-Searle, J., Schaffner, D.W., Kline, W. and Buchanan, R.L. 2017 Microbial evaluation of pre- and post-processed tomatoes from Florida, New Jersey and Maryland packinghouses Food Control 73 511-517
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Boz, Z., B.A.�Welt, J.K. Brecht, W. Pelletier, E. McLamore, G.A. Kiker, and J.E. Butler. 2018 Review of challenges and advances in modification of food package headspace gases. J. Applied Packaging Res. 10 62-97.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Sargent, S.A., A.D. Berry, J.K. Brecht, M. Santana, S. Zhang, and N. Ristow. 2017 Studies on quality of southern highbush blueberry cultivars: Effects of pulp temperature, impact and hydrocooling. Acta Hort. 1180 497-502.
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Nur Azlin Razali, Ana Clara Nascimento Antunes, Adrian D. Berry, and Steven A. Sargent 2016 Postharvest storage temperature and coating effects on fruit quality of red-fleshed pitaya (Hylocereus costarricenses). Proc. Florida State Hort. Soc. 129 190-194
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Takeda, F., W.Q. Yang, C. Li, A. Freivalds, K. Sung, R. Xu, B. Hu, J. Williamson and S. Sargent. 2017 Applying new technologies to transform blueberry harvesting Agronomy 7(2) 33
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Hagan, L.L., Johnson, P. N. T., Sargent, S.A., Huber, D.J. and Berry, A.D. 2017 1-methylcyclopropene treatment and storage conditions delay the ripening of plantain fruit while maintaining sensory characteristics of ampesi, the boiled food product Intl.Food Research Journal 24(2) 630-636
  • Type: Journal Articles Status: Published Year Published: 2018 Citation: Makani, M.N., S.A. Sargent, L. Zotarelli, D.J. Huber and C.A. Sims 2017 Harvest interval has greater effect on periderm maturity and storage quality of early-maturing, tablestock potato than nitrogen rate HortScience 52 1390-1395
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Sargent, S.A., A.D. Berry, J.K. Brecht, M. Santana, S. Zhang, N. Ristow 2017 Studies on quality of southern highbush blueberry cultivars: Effects of pulp temperature, impact and hydrocooling. (XI Intl. Vaccinium Symposium). Acta Hort. 1180 497-502
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Razali, N.A., S.A. Sargent, A.D. Berry and J.K. Brecht 2017 Harvest maturity affects fruit quality and postharvest behavior of red-fleshed pitaya fruit (Hylocereus costaricensis) Proc. Florida State Hort. Soc. 130 185-190
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: Brecht, J.K., Anne Plotto, Elizabeth A. Baldwin, Jinhe Bai, Sierra Jamir, Carlos Crisosto and Gayle Crisosto 2017 Sensory quality of fresh-cut mango at the consumer level sampled through the year Proc. Florida State Hort. Soc. 130 158-164
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: J. De, A. Sreedharan, Y. Li, A. Gutierrez, S. Sargent, K.R. Schneider Comparison of forced-air cooling and hydrocooling on the microbial quality control of Florida blueberries IAFP annual meeting July 9-12, 2017 Tampa, FL (presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: J. De, B. Bertoldi, A. Gutierrez, M. Jubair, S. Sargent, K.R. Schneider Effect of postharvest cooling on the microbial quality and storage of Florida peaches IAFP annual meeting July 9-12, 2017 Tampa, FL (presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: J. De, A. Sreedharan, A. Gutierrez, Y. Li, M. Jubair, K.R. Schneider Microbial evaluation of preprocessed and postprocessed tomatoes from Florida packinghouses during 2013 to 2015 IAFP annual meeting July 9-12, 2017 Tampa, FL (presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: Fernando J. Guam�n, Steven A. Sargent, Jeffrey K. Brecht, Adrian D. Berry and Merce Santana. Potential of partial cooling to expand handling options for fresh market strawberry. FSHS annual meeting June 4-6, 2017 Tampa, FL (presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: Nur Azlin Razali, Steven A. Sargent, Adrian D. Berry and Jeffrey K. Brecht Harvest maturity stage affects fruit quality and postharvest behavior of red-fleshed pitaya (Hylocereus costaricenses). FSHS annual meeting June 4-6, 2017 Tampa, FL (presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: Jeffrey K. Brecht, Anne Plotto , Elizabeth A. Baldwin, Jinhe Bai , Carlos Crisosto and Gayle Crisosto Sensory quality of fresh-cut mango at the consumer level sampled through the year FSHS annual meeting June 4-6, 2017 Tampa, FL (presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: "Nur Azlin Razali, Steven A. Sargent, Charles A. Sims, Jeffrey K. Brecht, Adrian D. Berry, and Guiwen W Cheng" Potential of postharvest coatings to maintain freshness of red-fleshed pitaya (Hylocereus costaricenses). ASHS annual meeting September 17-22, 2017 Waikaloa, Hawaii (presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: J.K. Brecht New technology in postharvest plastics ASHS annual meeting September 17-22, 2017 Waikaloa, Hawaii (presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: J.K. Brecht Modified atmospheres: Benefits and risks to fresh-cut produce Fresh?Cut Products: The Science and Art of Quality and Safety September 26-28, 2017 Davis, CA (extension presentation)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2018 Citation: J.K. Brecht Fresh?cut quality Issues regarding cell integrity, translucency & juice leakage Fresh?Cut Products: The Science and Art of Quality and Safety September 26-28, 2017 Davis, CA (extension presentation)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: S.A. Sargent Quality of small fruits  Trends and opportunities. VII Meeting of Small Fruits and Native Fruits in MercoSul countries. Embrapa Clima Temperado 1-Aug-17 Pelotas, RS, Brazil (presentation)