Bitters C-22 Citrandarin

Bitters C-22 is a Sunki mandarin × Swingle trifoliate orange hybrid produced at USDA Indio and selected and tested at UCR. Named in honor of W. P. Bitters, it was released in August 2009 and first distributed by CCPP in September 2009.^⁠[7]⁠[2]

As a rootstock, C-22 produced small trees with high yields relative to canopy size. UCR reported good freezing response in young trees, CTV tolerance, moderate tolerance to Phytophthora parasitica, limited citrus-nematode tolerance, and strong calcareous-soil tolerance. ^⁠[1]In a six-year South Texas trial, Rio Red grapefruit on C-22 had the highest cumulative yield; this is a scion/rootstock result, not C-22 fruit quality.^⁠[5]

The Mulberries’ two-fruit sample averaged 36.5 g, with 14.5 °Brix and approximate pH 3.1. Its companion card describes low sweetness, very sour flavor and moderate bitterness; the video’s spoken account describes the bitterness as fairly high. It was moderately edible in that tasting. A separate Carrizo-grafted grower sample was mushy and difficult to peel.^{⁠[3]⁠[9]⁠[4]}