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World of CitrusWorld of CitrusWilliams Tangelo
Givaudan Citrus Variety Collection at UCR
https://citrusvariety.ucr.edu/crc2787 (opens in a new tab)
Accessed
Walter T. Swingle; T. Ralph Robinson; E. M. Savage · U.S. Department of Agriculture, Circular No. 181 · August 1931
Printed pp. 4–5; physical scan pp. 8 and 11, with plate 1 on scan p. 9. Historical CPB 1397 description and Florida selection/growing account. The source does not report a fruit-sample count or replicated trial; it is not a current commercial-performance assessment.
Accessed
Edward O. Olson and G. H. Godfrey · Rio Grande Valley Horticultural Club · 1953
http://www.subplantsci.org/wp-content/uploads/2016/02/v07-1953.pdf (opens in a new tab)
Table 2, printed p. 28, reports counts for seedlings in Substation 15 plots inoculated in 1950: cotton-root-rot deaths in 1951 and 1952, and seedlings alive in September 1952. Counts are not percentages; the table gives no per-row denominator. The paper cautions that freeze injury, other diseases, and planting-date differences complicated comparisons.
Accessed
F. E. Gardner and G. E. Horanic · Proceedings of the Florida State Horticultural Society · 1959-06-13
https://journals.flvc.org/fshs/article/download/101309/97253/130008 (opens in a new tab)
Table 1, printed p. 83, reports adjusted and unadjusted cold-injury ratings and trunk circumference for named rootstocks under Valencia orange tops. The 10-year-old planting was at Weirsdale, Florida; injury followed winter 1957–58 freezes and ratings were made June 18, 1958. The study-specific ratings are comparative rootstock results, not traits of the rootstock variety as a scion or a temperature threshold.
Accessed