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The Valencia orange is a sweet orange cultivar named after the famed oranges in Valencia, Spain. It was first hybridized by pioneer American agronomist and land developer William Wolfskill in the mid-19th century on his farm in Santa Ana , southern California , United States, North America.
The first report of HLB in Texas occurred on January 13, 2012, from a Valencia sweet orange tree in a commercial orchard in Texas. [24] Prospects are bleak for the ubiquitous backyard citrus orchards of California as residential growers are unlikely to consistently use the pesticides which provide effective control in commercial orchards. [25]
Smith Red Valencia is a pigmented bud sport of a conventional Valencia orange tree. An initial scientific report stated: The rind frequently carries a heavy red blush and the flesh is heavily pigmented by anthocyanin. The fruit shape is somewhat variable at present, globose to ovoid with a depressed base, possibly due to the juvenility of the ...
Citrus × sinensis (sometimes written Citrus sinensis), a hybrid between pomelo (Citrus maxima) and mandarin (Citrus reticulata), also known as the sweet oranges, is a commonly cultivated species of orange that includes Valencia oranges, blood oranges and navel oranges.
A double graft union of diamante citron upon sour orange rootstock. Sour orange: the only rootstock that truly is an orange (the Citrus × aurantium or bitter orange). It is vigorous and highly drought-resistant. Poncirus trifoliata: a close relative of the genus Citrus, sometimes classified as Citrus trifoliata.
In later stages of infection the tree will suffer from heavy leaf drop, high percentages of fruit drop, and deep twig die back. A greening positive citrus tree's canopies will be airy due to the defoliation the disease causes. [18] After a tree becomes infected with citrus greening it becomes uneconomical and may die within 2–5 years. [19]