2006 Annual Report
The quality of fruits and vegetables declines after harvest, meanwhile, quality and preservation of whole and fresh-cut fruits and vegetables is of considerable importance in determining their marketability and consumption. At the same time that increased sanitation and reduced spoilage is expected, there has been loss of approved fungicides. In addition, consumers are expecting greater availability of fruits and vegetables with the 'organic' label. This situation calls for development of new and more 'green' technologies to provide the quality and shelf life that the market demands. Furthermore, increased international trade calls for longer shelf-life to cope with more distant surface transport of commodities.
The proposed research is highly relevant to National Program Area 306, "Quality and Utilization of Agricultural Products", Component 1, "Quality Characterization, Preservation and Enhancement". It addresses the prevention of decay and quality loss after harvest and development of "environmentally friendly" products and technologies, which are fundamental tenets of NP 306. The project has three specific goals:.
2. Test coatings with elicitors and organic oils on citrus and strawberry.
3. Measure peel barriers to some compounds.
4. Develop new organic coatings.
5. Test elicitors on phytoalexins on fresh-cut produce.
Year 2 (FY 2006) 1. Repeat field studies and start to develop predictive model for preharvest factors.
2. Prepare manuscripts on preharvest methodology and efficacy of coating treatments.
3. Develop predictive models for coating permeability effects on fruit quality.
4. Prepare manuscript on models.
5. Combine elicitors and phytoalexins with coatings and test on fresh-cut produce.
6. Prepare manuscripts on elicitor work.
Year 3 (FY 2007) 1. Evaluation of coatings to reduce microflora.
2. Survey microflora in fruit downstream from packinghouses.
3. Prepare manuscripts on preharvest predictions and coating work.
4. Validate models on coating permeability effects on fruit quality.
5. Transfer technology.
6. Try successful treatments on commercial scale and on other types of produce.
7. Prepare manuscripts on coating work.
Year 4 (FY 2008) 1. Develop packing house guidelines based on survey data.
2. Prepare manuscripts on coating data.
3. Transfer technology on coating work and pre-harvest predictions.
4. Measure peel barriers for hydrophilic compounds.
5. Prepare manuscripts on coating models.
6. Optimize and transfer technology.
Year 5 (FY 2009) 1. Conclude studies/Objective 1.
2. Prepare manuscripts and complete technology transfer/Objective 1
3. Conclude studies/Objective 2.
4. Prepare manuscripts and complete technology transfer/Objective 2.
5. Conclude studies/Objective 3.
6. Prepare manuscripts and complete technology transfer/Objective 3.
All accomplishments contribute to the mission of NP 306, "Quality and Utilization of Agricultural Products", Component 1, "Quality Characterization, Preservation and Enhancement".
Work on citrus coatings and cut fruit was presented at local and regional field days (University of Florida Packing House Day, University of Florida and ARS Processors Day and Subtropical Technology Conference), workshops, national scientific meetings, the International Fresh Cut Association annual meeting and the S-294 Regional Working Group "Postharvest Quality and Safety in Fresh Cut Vegetables and Fruits".
Presentations on edible coatings were given at a Chinese institute and university.
Narciso, J.A. A review of sanitizing methods used in Florida on packinglines. 29th Annual Citrus Postharvest Pest Control Meeting, Santa Barbara, CA, May 8, 2006.
Narciso, J.A. Assessing methods to clean fruit surfaces. 29th Annual Citrus Postharvest Pest Control Meeting, Santa Barbara, CA, May 8, 2006.
Narciso, J. Packingline sanitizers for use against canker and decay pathogens. IFAS Packinghouse Newsletter, University of Florida, August, 2006.
Narciso, J. Extending shelf-life [of strawberries] with a pre-harvest non-residual spray. Agritech Meeting, Plant City, FL, August, 2006.
Plotto, A., Narciso, J.A. 2006. Guidelines and acceptable postharvest practices for organically grown produce. HortScience. 41(2):287-291.
Narciso, J., Plotto, A. 2005. A comparison of sanitation systems for fresh-cut mango. HortTechnology. 15(4):837-842.
Georgelis, N., Scott, J.W., Baldwin, E.A. 2006. Inheritance of high sugars from tomato accession PI270248 and environmental variation between seasons. Journal of the American Society for Horticultural Science. 131(1):41-45.
Pinnavaia, S., Plotto, A., Baldwin, E.A., Narciso, J.A. 2006. Enzyme-peeled oranges for fresh-cut slices. Florida State Horticulture Society and Citrus Industry. Paper No. 41.
Plotto, A., Rattanapanone, N. 2006. Edible coatings for lychee fruit to maintain color in storage. Florida State Horticultural Society Meeting. Paper No. 38.
Baldwin, E., Narciso, J., Cameron, R., Plotto, A. 2006. Effect of pectin oligomers on strawberry fruit decay and ethylene production. HortScience. 41(4):1044.
Baldwin, E. 2006. Current research programs at the USDA/ARS Citrus and Subtropical Products Laboratory. HortScience. 40(3):504.
Mahattanatawee, K., Baldwin, E., Goodner, K., Manthey, J., Luzio, G. 2006. Nutritional components in select Florida tropical fruits. HortScience. 40(3):504.
Narciso, J., Baldwin, E., Plotto, A. 2006. Testing antifungal competency of compounds against some postharvest pathogens using the disc assay method. HortScience. 40(3):511.
Scott, J.W., Baldwin, E. 2006. 'Flora-Lee': a field tomato for the premium tomato market. Tomato Quality Workshop Proceedings. Paper No. 17.
Ritenour, M., Narciso, J.A. 2006. Postharvest calcium chloride dips of whole tomato fruit reduce postharvest decay under commercial conditions. HortScience. 41(4):1016-1017.
Pinnavaia, S., Plotto, A., Baldwin, E.A., Narciso, J.A. 2005. Enzyme peeling of 'Valencia' orange for fresh-cut slices. Subtropical Technology Conference Proceedings. 56:24-25.