). Therefore, selection of a cultivar with inherently excellent quality potential and processing it at the optimal ripeness stage for fresh-cut processing, which should be based on appearance, sensory, and compositional quality, are key decisions for successful
Sharon Dea, Jeffrey K. Brecht, Maria Cecilia do Nascimento Nunes, and Elizabeth A. Baldwin
Marisa M. Wall and Shakil A. Khan
( Paull, 2004 ). Irradiated fruit retained visual and compositional quality under these conditions (10 °C for 12 d), which would be sufficient for air transport from Hawaii to U.S. mainland markets. Exporters using irradiation for quarantine security can
Mildred N. Makani, Steven A. Sargent, Lincoln Zotarelli, Donald J. Huber, and Charles A. Sims
85% relative humidity (seasons 1 and 2 combined). There was no interaction between fertilizer treatments, harvest interval, and storage time on the selected compositional qualities of ‘Fabula’; tuber SSC, TTA, and pH averaged 3.59%, 0.14%, and 3
James B. Magee
The southern highbush blueberry (Vaccinium, mostly corymbosum) cultivars Jubilee, Pearl River, and Magnolia and the rabbiteye cultivars Climax and Premier were stored for 4 weeks at 1-2 °C. Berries were held in pint “clam shell” plastic retail units and were evaluated weekly for physical and compositional quality. As groups, the rabbiteyes were higher in SSC, SSC/TA, glucose and fructose, anthocyanins, and malic, quinic, and succinic acids. `Jubilee' was the southern highbush and `Climax' the rabbiteye least affected by the storage. `Pearl River' and `Magnolia' were less firm and more shriveled than the other cultivars. `Magnolia' had the highest incidence of decay; decay was slight overall.
Chen Jiang, Penelope Perkins-Veazie, Guoying Ma, and Christopher Gunter
The consumption of fresh muskmelons (Cucumis melo reticulatus L.) has been linked to severe illness outbreaks due to contamination with bacterial pathogens. Antimicrobial essential oils (EOs) were incorporated into wash water sprays and evaluated as potential agents for postharvest disinfection of ‘Athena’ muskmelons. Freshly harvested fruits were sprayed with 0.5% EOs from cinnamon leaf, thyme, or clove bud emulsified in a whey protein emulsion (WP) as potential washing disinfectants, together with deionized water, water with 200 µL·L−1 free chlorine (pH 7, free turbidity), or oil-free WP as controls. Melons were treated, stored at 4 °C and then evaluated weekly for weight loss, rind color, mesocarp firmness and the compositional quality traits soluble solids content (SSC), pH, β-carotene content, and total ascorbic acid (AsA) for up to 21 days. Essential oil–treated melons were not different from controls in fruit quality and composition with the exception of fruits treated with thyme oil, which were statistically lower in SSC (0.8 °Brix) than those treated with water or cinnamon oil treatment. Internal carbon dioxide was statistically higher (≈0.1% higher in value, equal to a 25% increase) in muskmelons receiving whey protein–based treatments after storage for at least 7 days. Overall, our results suggest that EOs as disinfectants have little effect on quality or composition of muskmelon fruit.
Monica Ozores-Hampton, Eric Simonne, Fritz Roka, Kelly Morgan, Steven Sargent, Crystal Snodgrass, and Eugene McAvoy
With increasing environmental concerns, the sharp cost increase of fertilizer and the absence of a soil test to predict nitrogen (N) needs of tomato (Solanum lycopersicon L.) grown on Florida’s sandy soils, a partnership was created with growers, state agencies, and the University of Florida, Institution of Food and Agricultural Sciences (UF/IFAS). The objectives of this study were to identify a range of N rates that would result in highest yields and postharvest quality, and maximum economical return for tomato, grown with subsurface irrigation (management of a perched water table above an impermeable soil layer or hard pan) during the spring season (low probability of leaching rain events). The study was conducted in Spring 2007 and 2008 in Palmetto, FL, with N rates ranging from 22 to 470 kg·ha−1 at pre-plant as ammonium nitrate (NH4NO3). Weather conditions were typical of a dry spring season in central Florida with no leaching rain events recorded in either year; however, rain patterns were different between the 2 years. In the absence of leaching rain and frost protection (either may raise the water table), petiole sap NO3-N decreased over time and the rate of decline depended on the N fertilizer rate. Extra-large and total marketable fruits yields showed a quadratic plateau response to N rates with maximum yields at two harvests (97% of the yields) grown with 172 and 298 kg N/ha in 2007 and 2008, respectively. During subsequent ripening, N rate did not correlate consistently to fruit ripening rate, fruit firmness, nor compositional quality at table-ripe stage. The high value of tomatoes relative to the cost of N fertilizer created a situation in which the profit-maximizing rate of N was not significantly different from the production-maximizing N rate. Whether the profit-maximizing level of N was higher or lower than the UF/IFAS-recommended rate depended on the growing season. With favorable growing conditions (i.e., conditions in 2008), a grower’s net return would have decreased between $1000 and $2000 per hectare by using UF/IFAS-recommended rates depending on market conditions. However, if the UF/IFAS-recommended rate of 224 kg·ha−1 resulted in the highest yield, applying upwards of 300 kg·ha−1 would have increased grower production costs by at least $67/ha. Although fertilizer costs are known before the crop is grown, tomato prices are realized only at the end of the growing season and profit margins can only be calculated after the fact.
Valtcho D. Zheljazkov, Santosh Shiwakoti, Tess Astatkie, Ivan Salamon, Daniela Grul'ová, Silvia Mudrencekova, and Vicki Schlegel
Antibacterial activity of Cuminum cyminum L. and Carum carvi L Essential Oils J. Agr. Food Chem. 53 57 61 Jirovetz, L. Buchbauer, G. Stoyanova, A.S. Georgiev, E.V. Damianova, S.T. 2005 Composition quality control and antimicrobial activity of the essential
Gregory M. Peck, Ian A. Merwin, Christopher B. Watkins, Kathryn W. Chapman, and Olga I. Padilla-Zakour
strong purchasing motivation. Although many consumers are motivated to purchase organic foods for their putative compositional quality, our study suggests that for ‘Liberty’ apples, this perception might be incorrect. Other factors such as relative price
Bryan Hed and Michela Centinari
.W. Schmidtke, L.M. 2013 Grapevine bunch rots: Impacts on wine composition, quality, and potential procedures for the removal of wine faults J. Agr. Food Chem. 61 5189 5206 Tardaguila, J. Martinez de Toda, F. Poni, S. Diago, M.P. 2010 Impact of early leaf
Yanina Perez Cayo, Steven Sargent, Cecilia do Nascimento Nunes, and Vance Whitaker
deterioration affecting not only the appearance of the fruit but also its compositional quality. Loss of weight is mostly caused by increased transpiration resulting in loss of water from the fruit to the environment. Water loss is strongly correlated with