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Improvement of Fruit Varieties (1948) By Josef Löschnig – English Translation
This is a valuable account on man-made periclinal chimeras between apple varieties. Thank you to quinoah on the Tropical Fruit Forum for sharing the original text. 187 SCHOLLE BOOKLET Court Councilor Josef Loschnig SCHOLLE-VERLAG WIEN I STUBENRING 6 (Scholle Publishing House, Vienna I, Stubenring 6) Scholle Library, 187th Booklet Improvement of Fruit Varieties Hybrids, Mutations,…
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Predicting Future Fruit Quality
This calculator is based on the data collected from 48 citrus trees that have been taste tested as well as grown on our property so their leaves could be tasted and counted. Our original idea was to incorporate leaf type into the prediction model (percentage of leaves that were unifoliate or bifoliate), since this would…
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Re-creating the Prague Chimera
The citrus variety known as the Prague Chimera is best known for its extreme hardiness down to 0°F, or slightly lower, while also producing dessert-quality citrus fruit – a feat not yet matched by any other hardy citrus variety. The key to this extremely rare and valuable combination of traits is that it is a…
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Citrus Fruit Quality vs. Cold Hardiness
Last updated: May 2026 Correlation: 0.8 (0.8 to 1.0 = very strong) The cold hardiness ratings reported here are composed of: firsthand observations, secondhand observations, and estimations – primarily based on growing in the Southeastern United States. These same ratings may not be as accurate for the Northwestern United States, and can vary substantially based…
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Downloadable Files
Hardy Citrus for the Southeast by Tom McClendon UF/IFAS Rapid Evaluation System For Citrus Breeding The Hardy Citrus of Texas The Hardy Citrus of Texas Part II Citrus Hybrid Seedlings Reduce Initial Time to Flower When Grafted Onto Shiikuwasha Rootstock Cold Hardy Citrus Challenges and Advances in Southeast Pennsylvania Trials by Mel Martin
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Citrus Resources
Stan (The Citrus Man) McKenzie https://www.youtube.com/@TheCitrusman Virginia Fruit Grower https://www.youtube.com/@VirginiaFruitGrower Tough Citrus https://www.youtube.com/@toughcitrus Madison Citrus Nursery https://www.youtube.com/@madisoncitrusnursery Cold Hardy Citrus Blog https://hardycitrus.blogspot.com/ Fruitmentor https://www.youtube.com/@Fruitmentor Prague Chimera https://www.lemonhill.it/varieta/citsuma-prague/ Givaudan Citrus Variety Collection at UCR https://citrusvariety.ucr.edu/citrus-varieties The Tropical Fruit Forum https://tropicalfruitforum.com/index.php Citrus Growers V 2.0 https://citrusgrowersv2.proboards.com