International Journal of Fruit Science


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    International Journal of Fruit Science website
  • Other titles
    International journal of fruit science (Online), International journal of fruit science
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    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publications in this journal

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    ABSTRACT: Trans-resveratrol, total antioxidant capacity (TAC), and total phenolic compounds were assessed in Bolivian grape cultivars collected at high altitude valleys. The TAC of the grapes ranged from 0.8 to 22 μmol Trolox equivalents/g dry matter determined by 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid), and from 0.6 to 10 determined by the ferric reduction antioxidant power. In the present study, we observed that under certain conditions trans-resveratrol levels in Bolivian grapes are 10-fold higher than the reported data from the literature. Additionally, the temporal evolution in three different solar ultraviolet-B radiation levels was carried out to understand their effect on the oxidative processes.
    International Journal of Fruit Science 04/2014; 14(3):311-326.
  • International Journal of Fruit Science 01/2013;
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    ABSTRACT: Drosophila suzukii (Diptera: Drosophilidae), an Asian pest of strawberries and other thin-skinned fruit, was first detected in the Americas in California in the fall of 2008, and its first discovery in Florida came on 4 August 2009 in Hillsborough Co. Although D. suzukii is now found throughout much of Florida, no commercially damaging larval infestations have been reported in fresh market strawberries. Although other drosophilids were present in surveys, only Drosophila melanogaster appears to be a formidable competitor for D. suzukii in strawberries and may prevent or even conceal economic damage in strawberries held for processing.
    International Journal of Fruit Science 01/2013; 13(1-2):67-75.
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    ABSTRACT: The influence of cluster exposure to sunlight on fruit composition of ‘Norton’ grapes was studied. Three exposure levels, such as fully exposed, partly exposed, and fully shaded, were established by canopy management practices, such as shoot positioning, shoot thinning, and leaf removal. Row orientation significantly impacted fruit composition with east west orientation and resulted in high total soluble solids, anthocyanin, and tannin content. Titratable acidity, total phenol, and juice potassium was highest in vines planted in north south row orientation. Fully shaded clusters had the lowest total soluble solids, lower glucose and fructose content, and highest juice potassium and malic acid content. Fully exposed clusters displayed lowest titratable acidity. Fully exposed clusters on the west and south side of the canopy received photosynthetically active radiation of more than 1,100 μ mole m sec, while partly exposed and fully shaded clusters received less than 10% of total photosynthetically active radiation at solar noon. Berries on fully exposed clusters exhibited a temperature that was about 10–15°F higher than air temperature, while fully shaded clusters were about 1–2°F higher than air temperature.
    International Journal of Fruit Science 10/2012; 12(4):410-426.
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    ABSTRACT: Proximally growing individuals of wild, lowbush blueberry (Vaccinium angustifolium Ait.) vary widely in yield despite being grown under conditions in which environmental heterogeneity is minimized by cultivation practices. We recently established that the relative self-fertility of the bearing plant is a significant predictor of its outcross yield. Further, although the species has historically been characterized as largely self-infertile, we, and others, have documented large variation in this trait among individuals within fields, and, thus, relative self-fertility stands as a partial explanation of yield variation in addition to other genetic factors, such as significant general and specific combining abilities. Here, we extend our scope by experimentally addressing whether pollen neighborhood affects yield. Lowbush blueberry is not sown, rather individuals have colonized fields by natural processes. Commercial fields of lowbush are generally pollinated by rented honey bees, which tend to pollinate nearby flowers. Our hypothesis is that clones may have become situated in differentially suitable pollen environments, at least partly explaining yield differences. We identified two high and two low natural yielders from each of two managed fields and collected pollen mixes from five donors surrounding each (n = 8). Under field conditions, each recipient received four pollination treatments including its' own neighborhood and the other three donor neighborhoods within the same field. Results showed that one of the low producers in each field had significantly higher yields when pollinated by any but their own neighborhood, thus substantiating our hypothesis that pollen neighborhood has an effect on yield.
    International Journal of Fruit Science 01/2012; 12:65-74.
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    ABSTRACT: The tetraploid species in Vaccinium section Cyanococcus and tetraploid V. uliginosum in section Vaccinium are autotetraploid. The same is probably true of the tetraploid species in other sections of the genus. Chromosome pairing at metaphase I in these species is normally regular and bivalent, but each gamete contains two homologous chromosomes for each of the 12 basic chromosome types (x = 12 in Vaccinium). Thus, F1 hybrids between tetraploid plants from different Vaccinium sections can have regular bivalent chromosome pairing during meiosis and high fertility, even though diploid hybrids involving the same sections are highly sterile. Such fertile tetraploid hybrids are called amphidiploids. Amphidiploidy can give rise to new species; several important crop species are domesticated amphidiploids. The conditions for amphidiploid formation are narrow. The two species that hybridize must be divergent enough to insure faithful homologous bivalent chromosome pairing in the hybrid, where each bivalent consists of chromosomes derived from the same parent species. However, the parent species must be closely enough related to permit formation of vigorous hybrids. The first indication that amphidiploidy could be useful in blueberry breeding was a report by Rousi in 1963 of vigorous, fertile hybrids between tetraploid V. uliginosum (section Vaccinium) and tetraploid V. corymbosum (section Cyanococcus). In Florida, crosses of colchicine-induced tetraploid V. arboreum (section Batodendron) with tetraploid highbush cultivars and with tetraploid Florida V. myrsinites (section Cyanococcus) indicate that Vaccinium sections Batodendron and Cyanococcus also have the right degree of divergence to produce vigorous, fertile tetraploid hybrids. The feasibility of producing other intersectional tetraploid combinations in Vaccinium, and the vigor and fertility of the hybrids, can best be determined by trial and error.
    International Journal of Fruit Science 01/2012; 12:269-275.
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    ABSTRACT: This study was developed to determine the nutrient distribution within a ‘Tifblue’ rabbiteye (Vaccinium ashei Reade) blueberry. Rooted cuttings were potted into 3.8-liter containers and placed into a completely randomized design on a covered bench. Plants were divided evenly into three groups for low, high, and control fertilization. At the end of the growing season, sample plants were each divided into leaves, upper stems, lower stems, trunk, root ball, and fine roots, and were then dried. Mineral analysis was preformed and mineral distribution determined. Approximately 25% of nitrogen found in blueberry plants was located in the leaves, with the remaining 75% being distributed evenly throughout the more woody partitions. Phosphorus was more evenly distributed, yet the highest concentration was also found in the leaves (0.14% P). Potassium was found at a much higher concentration in the leaves (0.79% K). Mineral distribution varied very little with the rate of fertilization, but varied greatly across plant organs.
    International Journal of Fruit Science 01/2012; 12:48-53.
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    ABSTRACT: The “All about Blueberries” Community of Practice is adapting the best existing extension publications and developing new research-based extension recommendations related to blueberry production and consumption. Our primary goal is to increase blueberry productivity and consumption of blueberries, initially in the southeast and then nationwide. The experts that are members of our Community of Practice are located in the southeastern United States (Alabama, Louisiana, Mississippi, and North Carolina) where both southern highbush and rabbiteye blueberries are grown. Southern states with relatively small blueberry industries and insufficient funds to support active land-grant research and extension programs (Louisiana and Alabama) are benefiting from cooperation with the United States Department of Agriculture, Mississippi State University, and North Carolina State University that have well-developed, robust research/extension programs that support the blueberry industry.
    International Journal of Fruit Science 01/2012; 12:350-359.
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    ABSTRACT: The efficacy of biological controls and application of mulch for control of the blight stage of mummy berry disease was examined in different lowbush blueberry fields in Maine over 5 years. Biological controls tested included compost teas and commercial products containing Trichoderma harzianum, Bacillus pumilus, B. subtilis, Streptomyces lydicus, and plant extracts of neem, garlic, citrus, and giant knotweed. Treatment with compost teas did not affect numbers of fungal and bacterial colony-forming units on leaves compared to controls. Early application of peat mulch before leaf bud break was partially effective at controlling disease in the field. In 2010, extracts of citrus and giant knotweed and a B. subtilis commercial product were effective at controlling disease in at least one of two fields. The other biological controls did not significantly decrease disease incidence compared to untreated controls.
    International Journal of Fruit Science 01/2012; 12(1-3):188-204.
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    ABSTRACT: The Great Lakes Region is an important region of blueberry production in the U.S., producing 30% of the annual U.S. production. In Michigan, blueberry acreage increased from 17,724 acres on 590 farms in 2002 to 21,758 acres on 840 farms in 2007. However, despite considerable market potential for organic blueberries, less than 1% of total Michigan blueberry acreage is organically certified. There is high interest and demand for organic blueberries from the Great Lakes Region, and the Michigan State University Blueberry Team has been working on organic production methods over the past 4 years. The establishment of the Michigan State University Organic Blueberry Research and Extension Planting on the Michigan State University campus has been one of the major accomplishments of the Michigan State Uuniversity research team. The objective of this project has been to study practices associated with soil health, nutrition, disease, and insect and weed control. Additional organic blueberry projects in Michigan have focused on studying the interaction of blueberry mulches and compost on nutrient release, and on-station and on-farm testing of OMRI-approved pesticides.
    International Journal of Fruit Science 01/2012; 12:232-245.
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    ABSTRACT: A six-year organic systems research project was conducted in Maine from 2004 to 2009. The project had several components: (1) a large replicated interdisciplinary multifactor (fertility, weed, insect, and pathogen) experiment over three cropping cycles (6 years), (2) single disciplinary experiments designed to develop organic management tools for pest management, (3) an economic analysis of current organic production, (4) a survey of organic growers for the purpose of deriving a descriptive profile and the development of grower case studies, and (5) organic Extension workshops and field meetings and production of an organic wild blueberry grower's guide. This article highlights some of the outcomes of this project including: ecological interactions among pests and fertility, novel management tactics, niche-market diversity, and economic viability.
    International Journal of Fruit Science 01/2012; 12:216-231.