Greg McCollum ... P. trifoliata: 2001: US-802. This rootstock is responsive to viroid dwarfing and is recommended as a stock for viroid dwarfing of oranges. Citrus maxima ... and the places where a rootstock can be successfully used. A trifoliate hybrid rootstock is a cross between a variety called Poncirus trifoliata crossed with another type of citrus. For example, to propagate a lemon tree, rather than rooting lemon cuttings, citrus rootstock cuttings are rooted. A lemon cutting is then grafted to the rootstock. It would be the preferred rootstock for the cooler regions of NZ. Ongoing citrus trials. These rootstocks can then be used to graft citrus trees of many different varieties. The trifoliate hybrid rootstocks being tested were developed by Kim Bowman, rootstock geneticist of the USDA’s Agricultural Research Service in Fort Pierce, Florida. Poncirus trifoliata: a close relative of the genus Citrus, sometimes classified as Citrus trifoliata.It is especially resistant to cold, the tristeza virus, and the fungus Phytophthora parasitica (root rot), and grows well in loam soil. It is vigorous and highly drought-resistant. PT is a three petal leafed citrus (see picture below) that was brought from China as a rootstock for citrus along the gulf coast. Poncirus Trifoliata (PT) is the best rootstock for growing citrus trees along the upper Texas Gulf coast, even into Louisiana. The use of Flying Dragon trifoliate orange [Poncirus trifoliata var. USDA Citrus Rootstocks 2020 January Update Kim D. Bowman. monstrosa (T.Itô) Swing.] It is the only citrus that loses it … Flying dragon trifoliate (CRC 3330A) Flying dragon trifoliate (CRC 3330B) Fraser Seville sour orange . Field performance Poncirus trifoliata is generally a good rootstock for By putting together information from Furr C-57 citrange. The oldest trial, planted in 2014, is growing ‘Owari’ satsuma trees on 10 standard and new trifoliate hybrid rootstocks. Goutoucheng sour orange (CRC 3929) Goutoucheng sour orange (CRC 4004) Grapefruit seedling (CRC 343) Pomeroy trifoliate Cleopatra mandarin. Citrus macrophylla (Alemow) Citrus volkameriana Volkamer lemon . Sour orange: the only rootstock that truly is an orange (the Citrus × aurantium or bitter orange). The goal of this trial is to evaluate how Owari satsuma performs on these rootstocks to give growers more rootstock options. viroids, which cause dwarfing, and from citrus tatter leaf virus to which trifoliate orange is sensitive resulting in a yellow ring at the bud-union. Currently, most citrus in Georgia is grown on Poncirus trifoliata rootstocks such as Rubidoux, Rich 16-6 or Flying Dragon. Citrus fruit trees grown under tropical climatic conditions have a high level of vigor and, consequently, late fruit-bearing and low productivity. 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