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Citrumelo is widely employed as a citrus rootstock, [1] being resistant to the severe citrus tristeza virus and to phytophthora root rot as well as to blight, cold, and citrus nematode. [2] The trees can survive temperatures into the teens ( Fahrenheit ); [ 3 ] one specimen in North Carolina reportedly survived temperatures below zero Fahrenheit.
Citrumelo: Citrus × paradisi × Citrus trifoliata: −15 °C (5 °F) Semi-edible 'Dunstan' is considered the most edible citrumelo Kabosu: Citrus cavaleriei × Citrus x aurantium: −12 °C (10 °F) Edible, Used in cooking Long cultivated in Japan Shuangjuan (Ichang lemon) Citrus cavaleriei × Citrus maxima: −12 °C (10 °F) Edible, Used in ...
Swingle citrumelo: tolerant of tristeza virus and Phytophthora parasitica and moderately resistant to salt and freezing. [2] This rootstock selection was hybridized from the Duncan grapefruit (Citrus paradisi Macfadyen) and the Poncirus trifoliata (L.) Raf. by Walter Tennyson Swingle in Eustis, Florida, in 1907.
Citrumelo: × Citroncirus ssp. Citrumelo is also called Swingle citrumelo trifoliate hybrid, because it is cold hardy and is a hybrid between a 'Duncan' grapefruit and a trifoliate orange, developed by Walter Tennyson Swingle. Clementine: Citrus × clementina
Important hybrids: Citrus × aurantiifolia – Key lime Citrus × aurantium – Bitter orange Citrus × latifolia – Persian lime Citrus × limon – Lemon Citrus × limonia – Rangpur
Recently, the hybrid rootstock called Swingle citrumelo (Citrus paradisi x P. trifoliata) is highly resistant to the citrus nematode. [ 11 ] In California , the Statewide Integrated Pest Management Program of the University of California suggests chemical control of nematodes with application dependent on population levels of nematodes.
The citrange (a portmanteau of citrus and orange) is a citrus hybrid of the sweet orange and the trifoliate orange.. The purpose of this cross was to attempt to create a cold hardy citrus tree (which is the nature of a trifoliate), with delicious fruit like those of the sweet orange.
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