HortScience: a publication of the American Society for Horticultural Science (HORTSCIENCE)

Publisher: American Society for Horticultural Science, American Society for Horticultural Science

Journal description

Published seven issues per year (February, April, June, July, August, October, December) and includes the Annual Conference Program and Abstract issue. HortScience publishes horticultural information of interest to a broad array of horticulturists. Its goals are to apprise horticultural scientists and others interested in horticulture of scientific and industry developments and of significant research, education, or extension findings or methods.

Current impact factor: 0.86

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 0.855
2012 Impact Factor 0.938
2011 Impact Factor 0.778
2010 Impact Factor 0.886
2009 Impact Factor 0.696
2008 Impact Factor 0.914
2007 Impact Factor 0.794
2006 Impact Factor 0.613
2005 Impact Factor 0.574
2004 Impact Factor 0.497
2003 Impact Factor 0.546
2002 Impact Factor 0.57
2001 Impact Factor 0.542
2000 Impact Factor 0.47
1999 Impact Factor 0.514
1998 Impact Factor 0.462
1997 Impact Factor 0.512
1996 Impact Factor 0.469
1995 Impact Factor 0.421
1994 Impact Factor 0.435
1993 Impact Factor 0.415
1992 Impact Factor 0.434

Impact factor over time

Impact factor

Additional details

5-year impact 1.12
Cited half-life 0.00
Immediacy index 0.16
Eigenfactor 0.01
Article influence 0.26
Website HortScience website
Other titles HortScience, Hort science
ISSN 0018-5345
OCLC 1752284
Material type Periodical
Document type Journal / Magazine / Newspaper

Publisher details

American Society for Horticultural Science

  • Pre-print
    • Archiving status unclear
  • Post-print
    • Archiving status unclear
  • Conditions
    • Publisher last contacted on 27/03/2012
  • Classification
    ‚Äč white

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Hylocereus (Berger) Britton and Rose and Selenicereus (Berger) Britton and Rose are two genera of vine cacti, commonly named pitahaya, that produce fruit that are gaining in popularity as an exotic fruit in many countries. There has also been an increasing interest in these fruits because they can be grown in areas that are prone to drought and heat where other fruit production is not possible. However, there is significant taxonomic confusion regarding species within these genera as well as some uncertainty among named varieties. Amplified fragment length polymorphism (AFLP) was used to genotype a large pitahaya collection to determine if there was redundancy in some of the commonly named varieties as well as to assess the overall diversity of the collection. A total of 51 markers were scored from 230 accessions. Seven distinct clades were found with 126 putative clones but only three clades had high bootstrap (greater than 80%) support and one had moderate support (60%). Some of the differently named varieties were identical based on our analysis, but there was also genotypic diversity within putatively named varieties. The results of this study will help growers and researchers to choose genetically distinct accessions from the germplasm collection to investigate how different accessions perform in their growing regions.
    HortScience: a publication of the American Society for Horticultural Science 03/2015; 50(3):332-336.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The objective of this study was to determine the effect of phytosanitary X-ray irradiation on the physicochemical properties and sensory attributes of early- and late-harvest 'Bartlett' pears (Pyrus communis L.) during ripening under simulated commercial conditions. Irradiation delayed ripening, which in turn affected respiration rate, ethylene production, and firmness. Irradiation decreased ethylene production in early- and late-harvest pears and maintained firmness as compared with the control pears. In the early-harvest pears, irradiation did not affect respiration rate, weight loss, or total soluble solids. However, in the late-harvest pears, irradiation resulted in an increase in respiration rate and weight loss and a decrease in total soluble solids. The appearance for irradiated early-harvest pears was rated lower by consumers, but there were no significant differences in the rest of the attributes. Consumers rated the irradiated late-harvest pears lower (P < 0.05) than the non-treated pears for overall liking, texture, and flavor on a 9-point hedonic scale. Consumers perceived the late-harvest irradiated pears to be less sweet than the control (P < 0.05), which correlated with total soluble solids of 12.4% for treated pears vs. 13.2% for the control. Our results show that there were significant differences between the early- and late-harvest pears in their responses to irradiation. Although some sensory attributes were negatively affected, the delay in ripening helped reduce bruising and mold development in irradiated pears during the retail display simulation.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):279-287.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The highly weathered, mineral, and often eroded and acidic soils of the Ozark Highlands region of northwest Arkansas generally have low soil organic matter (SOM) concentrations as a result of rapid organic matter turnover rates in the warm, moist climate. Orchard management practices that can improve SOM may also improve other soil quality-related variables for sustained production, which is an explicit goal for the National Organic Program (NOP). Therefore, beginning in Mar. 2006 and continuing for seven seasons, annual applications of municipal green compost, shredded office paper, wood chips, and mow-blow grass mulch groundcover management systems (GMS) in combination with composted poultry litter, commercial organic fertilizer, or a non-fertilized control as a nutrient source were implemented to evaluate their ability to alter near-surface soil quality in a newly established, organically managed apple orchard in the Ozark Highlands region of northwest Arkansas. The SOM concentration in the top 10 cm averaged 1.5% across all treatments at orchard establishment in 2006, but by 2012, SOM concentration had increased in all GMS and more than doubled to 5.6% under green compost. Similarly, soil bulk density in the top 6 cm, which averaged 1.34 g.cm(-3) among treatment combinations in 2006, decreased in all GMS by 2012. Either green compost or shredded paper had the largest concentration of total water-stable aggregates across all aggregate size classes in the top 7.5 cm, whereas no differences among GMS were observed in the 7.5- to 15-cm soil depth. Green compost applied alone or in combination with commercial fertilizer had the largest estimated plant-available water (17.9% v/v) among all treatment combinations. Many soil quality-related variables measured in the various organic GMS had numerically greater values compared with an adjacent conventionally managed orchard on the same soils. Implementation of these GMS appears to provide apple producers in the Ozark Highlands and similar regions a tangible means of meeting NOP requirements for improving soil quality concurrent with production of certified organic crops. The findings also have implications for conventionally managed orchards, which have maintaining or improving soil quality as a management goal.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):295-303.
  • HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):152-152.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Luther Burbank, the quintessential nurseryman of the early 20th century, remarked that small fruit was the "Cinderella of the pomological family." He stated that although tree fruits had been improved to the point of an almost uncountable number of cultivars, it was the time and responsibility of his generation and those to follow to develop the small fruit for human consumption. Burbank had a penchant for detecting potential qualities of unusual plants and his broad association with plant explorers at the U.S. Department of Agriculture and elsewhere allowed him to examine diverse wild berry species. He obtained seeds of many small fruit species from throughout the world. He made wide crosses within and between these genera and species. Burbank selected and named many cultivars to be introduced through his nursery and elsewhere. He named and released 40 blackberries, raspberries (Rubies L.), and strawberries (Fragaria L.); four grapes (Vitis L.); and a hybrid Solanum that he named 'Sunberry'. He sometimes exaggerated their descriptions for promotion or public recognition. For example, Rubus x loganobaccus 'Phenomenal' was, he stated, "far superior in size, quality, color, and productivity..." to 'Loganberry'. Unfortunately, this cultivar was not a commercial success. Burbank made a few crosses and sold what he considered to be improved species, e.g., 'Himalaya Giant' blackberry R. armeniacus). He created new common names for foreign species, e.g., balloon berry (R. illecebrosus) and Mayberry (R. palmatus), to better market them. However, his amazingly keen observations of thornlessness, pigment diversity, and recognition of repeat flowering and fruiting in blackberries, raspberries, and strawberries, were insightful of the needs of future industry. Burbank was a disciple of Darwin and his theory of natural selection. Burbank's classic breeding approach, to make wide crosses, produce large numbers of hybrid seedlings, choose significant seedlings with his traits of choice, and backcross to the desired parent for several generations, was successful, although he did not know of ploidy or gene recombination. Unfortunately, the 'Himalaya blackberry', now ubiquitous in hedgerows and fields throughout the Pacific Northwest in the United States, is designated as a federal noxious weed. Although not presently in commercial production, three of his Rubies cultivars ('Burbank Thornless', 'Snowbank', and 'Phenomenal') are preserved in the U.S. Department of Agriculture, National Clonal Germplasm Repository, in Corvallis, OR.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):205-210.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The impact of organic fertilizer source on the growth, fruit quality, and yield of blackberry (Rubus L. subgenus Rubus Watson) cultivars (Marion and Black Diamond) grown in a machine-harvested, organic production system for the processed market was evaluated from 2011 to 2013. The planting was established in Spring 2010 using approved practices for organic production and was certified in 2012. Plants were irrigated using a dripline under a woven polyethylene groundcover (weed mat) installed for weed management. Two sources of liquid fertilizer were evaluated: 1) a corn steep liquor and fish waste digestion blend ("corn"; 2.5N-1.1P-1.2K); and 2) a fish solubles and molasses blend ("fish"; 4N-0P-1.7K). Fertilizers were applied by fertigation through the drip system at rates of 56 kg.ha(-1) nitrogen (N) per year in 2011-12 and 90 kg.ha(-1) N in 2013. The impact of fertigation on drip system performance was evaluated with two maintenance options, "flushing" and "no flushing" of the driplines. Total yield differed among years, whereas fruit soluble solids concentration and firmness as well as floricane biomass at pruning showed a year x cultivar interaction. 'Black Diamond' had greater total yield and average fruit weight than 'Marion', but produced a greater proportion unmarketable fruit. There was no effect of fertilizer source on yield, fruit quality, primocane length, or primocanes/plant in any year with the exception of fruit weight, which was greater with corn than with fish. 'Marion' had a greater floricane biomass when fertilized with fish than with corn. Soil nutrients were within the recommended range, except for boron (B), which was below recommended levels. Only soil nitrate-N was affected by fertilizer source, which was greater in 'Marion' than in 'Black Diamond' when fertilized with fish. Primocane leaf tissue nutrient concentrations were within recommended levels for all nutrients, except for calcium (Ca) and B, which were below recommended standards in both cultivars. Primocane leaf potassium (K) and zinc (Zn) concentrations were greater with fish than with corn. There was no fertilizer source or maintenance effect on emitter flow rate of the drip system in either year. However, flow rates decreased an average of 4.5% in the first year and 19% in the second year. Overall, there were no differences between the fertilizers on plant growth, yield, or fruit quality, and both fertilizers were suitable for planting establishment.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):225-233.
  • [Show abstract] [Hide abstract]
    ABSTRACT: A field study was conducted in 2008 and 2009 in Citra, FL, to evaluate the effects of seeding rate and removal of apical dominance of sunn hemp (Crotalaria juncea L.) on weed suppression and seed production by sunn hemp. Three seeding rates of sunn hemp were used: a representative seed production rate of 11 kg.ha(-1), an intermediate seeding rate of 28 kg.ha(-1), and a cover crop seeding rate of 45 kg.ha(-1). Cutting the main stem at 3, 4, or 5 weeks after planting to break apical dominance was compared with an uncut treatment. Cutting had no significant effect on shoot biomass, photosynthetically active radiation (PAR) penetrating the canopy, and nondestructive leaf area index (LAI). As a result, cutting also had no effect on weed density and biomass in 2008 and very little effect in 2009. Increase in seeding rate resulted in linear decrease in PAR and increase in LAI in both years. Seeding rate had a greater effect on suppression of weed biomass than on suppression of weed density. There was a linear decline in sunn hemp branching with increased seeding rate in 2009 and, averaged across years, flower number decreased linearly with increased seeding rate. Cutting to break apical dominance induced branching but had no effect on flower number. No seed pod production occurred and we postulate that the lack of seed production may be the result of the absence of effective pollinators in fall when short-day varieties of sunn hemp flower in Florida.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):263-267.
  • [Show abstract] [Hide abstract]
    ABSTRACT: White mold, caused by the necrotrophic fungus Sclerotinia sclerotiorum (Lib.) de Bary, causes stem rot, crown rot, wilt, and death of many common herbaceous ornamental plants. Relatively little research has been done on management of white mold and resistance to this disease in ornamental crops. Plant varieties from four genera of widely available annual bedding plants with no reported history of white mold susceptibility were evaluated for potential resistance to S. sclerotiorum. All plants were inoculated with three isolates of S. sclerotiorum and evaluated for disease severity in a controlled environment and under field conditions. Portulaca grandiflora Hook. 'Sundial Scarlet', P. grandiflora 'Sundial White', Pentas lanceolata Forssk. 'Graffiti Pink', and Scaevola aemula R. Br. 'Whirlwind White' were highly susceptible to white mold in the controlled environment but had significantly lower disease incidence and severity than Zinnia elegans x angustifolia 'Profusion White', the susceptible control, under field conditions. Impatiens hawkeri W. Bull. 'Sonic Red', I. hawkeri 'Sonic Amethyst', I. hawkeri 'Sonic White', I. walleriana Hook. f. 'Blitz 3000 Red', I. walleriana 'Blitz 3000 White', and I. walleriana 'Blitz 3000 Rose' displayed abscission of diseased plant tissue as an unusual resistance response. Plants from all four genera that were evaluated became infected with S. sclerotiorum to a lesser extent than susceptible controls under field conditions and could be used as part of an integrated disease management program for white mold in ornamental plantings.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):259-262.
  • [Show abstract] [Hide abstract]
    ABSTRACT: In 2011, 16 strawberry cultivars were planted with two planting systems a black-plastic-covered perennial system (BP) and a matted-row system (MR) arranged in a split-block design with four replications at the New Mexico State University (NMSU) Sustainable Agriculture Science Center, Alcalde, NM. Cultivars varied greatly in their yield and tolerance to high-pH soil. 'Allstar', 'Chandler', and `Darselect' were the three most sensitive cultivars to high soil pH among the 16 cultivars tested, whereas 'Wendy', 'Brunswick', 'Honeoye', and 'Clancy' were the four most tolerant cultivars by the end of July 2011. Two to three applications of 0.67 g.m(-1) (linear row) FeEDDHA were used per year through fertigation to effectively treat leaf chlorosis resulting from high soil pH. After averaging the yields of 2012 and 2013, 'Mesabi' and 'Kent' had greater yield than others and twice the yield of 'Jewel'. Early cultivars Earliglow and Annapolis and late cultivars L'Amour and Ovation all had low yields in both years. In Jan. 2013, the minimum temperature reached -21.7 degrees C, which caused crown damage to some cold-tender cultivars, especially in the black-plastic-covered system. 'Wendy', 'Chandler', 'Clancy', and 'Jewel' were the cold-tender cultivars, whereas 'Mesabi', 'Kent', 'Cavendish', and 'Honeoye' were the hardiest among those tested. Despite repeated late frosts from 19 Apr. to 4 May 2013 and a delayed harvest season, most cultivars produced greater yield than in 2012 with 'Mesabi' and 'Kent' being the greatest. There were no significant differences in yields in 2012 and 2013 between BP and MR treatments, but yield in BP was significantly lower than in MR in 2014. With appropriate cultivar selection and management, growers can produce strawberries in high-pH soil at high elevation with a short growing season in the Southwest.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):254-258.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Four blackberry (Rubus L. subgenus Rubus Watson) cultivars ('Obsidian', 'Black Diamond', `Metolius', 'Onyx') and two advanced selections (ORUS 1939-4 and ORUS 2635-1) were evaluated during the establishment years of an organic production system for fresh market. The planting was established in Spring 2010 using approved practices for organic production and was certified organic in 2012, the first fruiting year. Plants were irrigated using a dripline under a woven polyethylene groundcover (weed mat) installed for weed management. Liquid fertilizers injected through the drip system were used at rates of 56 kg.ha(-1) total nitrogen (N) in 2011-12 and 90 kg.ha(-1) total N in 2013. Genotypes differed in the level of nutrients measured in primocane leaves. Tissue phosphorus (P), potassium (K), sulfur (S), iron (Fe), manganese (Mn), copper (Cu), and zinc (Zn) concentrations were within the recommended standards, but tissue calcium (Ca), magnesium (Mg), and boron (B) were deficient in some or all genotypes. Although two cultivars and both advanced selections responded well in terms of plant growth and yield to the organic production system used, yields in 'Onyx' and `Metolius' were considered low for commercial production. In contrast, the higher yielding 'Obsidian' and ORUS-2635-1 appeared to be the best suited for organic fresh market production as a result of larger fruit size, greater fruit firmness, higher sugar-to-acid ratios, lower postharvest percent moisture loss in ORUS-2635-1, and the longest number of marketable storage days at 5 degrees C in 'Obsidian'.
    HortScience: a publication of the American Society for Horticultural Science 02/2015; 50(2):240-246.