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World of CitrusWorld of CitrusStar Ruby Grapefruit
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3770 (opens in a new tab)
Accessed
J.V. da Graça, E.S. Louzada, and J.W. Sauls · Proceedings of the International Society of Citriculture · 2004
The paper reports Hudson seed irradiated in 1959, Star Ruby selected and released in 1970 (p. 369). These are separate program and release milestones. It also describes a South African nucellar, seed-derived selection with less yield variability than the original Texas selection, and severe injury from some South African tristeza stem-pitting isolates (p. 371); do not generalize across selections or isolates.
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Auscitrus
https://citrusaustralia.com.au/wp-content/uploads/Star-Ruby.pdf (opens in a new tab)
Two-page fact sheet, last revised October 2002. Australian production and selection context. Page 1 distinguishes California Star Ruby from the Cant seed selection, describes Australian fruit-quality/harvest conditions and cautions on sweet-orange rootstock in replant or poorly drained sites; page 2 gives Australian field performance and disease context. Not a direct U.S. trial or individual Brix measurement.
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Web Admin · Florida Grower / Specialty Crop Grower · 2021-03-08
Florida Grower article published by Specialty Crop Grower. Lines 61–68 recount South African seed imported in 1972, nucellar seedlings planted on Troyer/Rough Lemon liners in 1975, first fruit evaluated in 1979, and the distinct South African seed-derived selection. It says South African selection may differ from Texas Star Ruby and that its HLB performance was unknown at publication. No trial design or numeric yield data in this account.
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Liz · My Favourite Pastime · 2018-02-01
https://myfavouritepastime.com/2018/02/01/star-ruby-grapefruit/ (opens in a new tab)
Personal food-blog post; lines 62–74 report that Liz bought the fruit in a local Canadian store and describe it as juicy and ruby red with tangy/tart flavor and underlying sweetness. No cultivar verification, sample count, origin, harvest maturity, or measurement method is supplied; do not generalize the description to all Star Ruby fruit.
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K.D. Bowman and U. Albrecht · USDA ARS USHRL / UF-IFAS SWFREC · 2020-02-14
One-page USDA ARS USHRL / UF-IFAS SWFREC notice dated 14 February 2020. It reports abnormal bud unions and/or unhealthy scion growth for Star Ruby grapefruit on US-1283 seedlings in nursery observations. Sample count, observation dates, and duration are not reported; this is a preliminary, limited propagation report, not a general compatibility test.
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Graham H. Barry et al. · The Genus Citrus (ScienceDirect Topics excerpt) · 2020
The chapter reports that Star Ruby was selected and released in Texas in 1970 from Hudson seed irradiated with thermal neutrons in 1959. It distinguishes a South African nucellar selection with more consistent bearing from the original Texas material.
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Eliezer S. Louzada and Chandrika Ramadugu · HortTechnology · 2021-05-05
https://journals.ashs.org/view/journals/horttech/31/3/article-p243.xml (opens in a new tab)
The cultivar profile reports Texas-specific problems with alternate bearing, sunscald, micronutrient deficiencies, and herbicide damage that reduced Star Ruby’s value there. It supplies no incidence, treatment, or effect-size data.
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Robert E. Rouse, Heinz K. Wutscher, and Charles O. Youtsey · Subtropical Plant Science · 2001
The article reports 0–9 seeds per Star Ruby fruit compared with 40–60 for Hudson (p. 3). It describes Star Ruby as a thermal-neutron-irradiated Hudson seedling released in 1970. These are historical cultivar descriptions, not measurements of a current sample.
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