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'Purple Meidiland' rose References
Article (magazine)  (2023)  
 
...our data confirm the previously reported ploidy of 10 accessions and dispute the ploidy of the other six accessions, i.e., Knock Out®, Home Run®, Miracle on the Hudson®, Blushing Knock Out®, Double Knock Out®, and Oso Easy Paprika®. Each of these six cultivars was previously reported as triploid (D. Zlesak, Per. Comm.).... However, the relative genome sizes determined by flow cytometry indicate that each cultivar is tetraploid...

Knock Out® 'Radrazz', Source/Accession MHCREC [Mountain Horticultural Crops Research and Extension Center, Mills River, NC]  ...Estimated ploidy level(x) 4*
 * Indicates ploidy level was confirmed with microscopy
Article (magazine)  (2010)  Page(s) 1781.  
 
Knock Out (RADrazz), Earth-Kind-designated rose for the south-central United States, Earth-Kind Brigade, Shrub, 1999, William Radler, Ploidy 3x ....
Article (website)  (2007)  
 
Roses with superior resistance (less than 2% foliage infected) to black spot and cercospora leaf spot were considered no-spray roses (do not require fungicides for clean foliage).

Knock Out is on the list of no-spray roses.
Website/Catalog  (2005)  Includes photo(s).
 
Award: Gold Medal; Best Rose in Trial; Best Floribunda Rose in Trial; Marion de Bomhe Memorial Award; Best Australian Rose in Trial.
Name: Burgundy Iceberg
Type: floribunda rose
Habit: a sport of Pink Iceberg
Breeder: Lilia Weatherly, Tasmania
Exhibitor: Swane's Nurseries, NSW
Award: Gold Medal; Best Hybrid Tea in Trial
Name: Sundance
Type: hybrid tea rose
Habit: the formal buds are a rich orange that open to a clear yellow
Breeder: Jackson & Perkins OR, USA
Exhibitor: Swane's Nurseries, NSW
Award: Gold Medal
Name: Knock Out
Type: floribunda rose
Habit: masses of semi-double blooms of vibrant magenta to cherry red
Breeder: William Radler, Wisconsin USA
Exhibitor: Corporate Roses, SA
Book  (Aug 2002)  Page(s) 52.  
 
Knock Out
Shrub 2000
Interim rating 8.4
(2000)  Page(s) 280 & 490.  
 
Discrepancy in name. P. 280 spells it as Knockout. P.490 Is the definitive registration page entry and spells it Knock Out.
Website/Catalog  (30 Aug 1999)  Page(s) 6.  Includes photo(s).
Magazine  (May 1999)  Page(s) 42.  
 
Registration
'RADrazz', S, rb, 1999, (Knock Out) ... description
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