CARNATION WILT DISEASES 



43 



Table 13. Relative Susceptibility of Carnations to Alternaria Dianthi. 



Resistant 



Slightly Susceptible 



Very Susceptible 



Abundance, Pink 



Achievement 



Antarctic 



Arctic 



Aviator 



Barbara Brigham 



Barbara Farr 



Beuerlein, Mrs. M. 



Bonanza 



Brealc-O-Day 



Chief Koliomo 



Dairy Maid 



Dandy 



Del Ray 



Del Ray, White Sport 



Dimity 



Ditchling 



Donald 



Early Dawn 



Early Rose 



Edna 



Eldora Variegated 



Eleanor 



Golden Wonder 



Great Heart 



Harvester 



Ivory 



Joan Marie 



John Briry 



Johnson's Crimson 



King Cardinal 



Maine Sunshine 

 Maytime 

 Melrose 

 Morning Glow 

 My Love 

 My Love, \\'hit£ 

 North Star 

 Olivette 

 Orange Wonder 

 Orchid Beauty 

 Paragon 

 Patrician 

 Pelargonium 

 Peter Fisher 

 Pink Treasure 

 Po entate 

 Puritan 

 Purity 

 Radiolite 

 Satellite 



Scarlet Monarch 

 Senator 

 Sim, Mary E. 

 Sophelia 

 Snow White 

 Sunset Glow- 

 Super Supreme 

 Uneeda Pink 

 Wildfire 

 Wilson, E. H. 

 Winsome 

 Woburn 



Atlantis 

 Donna Lee 

 Hazel Draper 

 Illuminator 

 Jewel 

 Luminosa 

 Ocean Spray 

 Scarlet Monarch 

 Spec:rum 

 Spectrum, Salmon 

 Spectrum Supreme 



Moderately Susceptible 



Betty Lou 



Delight, Pink 



Delight, White 



Fragrance 



Irene 



Jane Sutherland 



Sceptre 



Aida 



Blush Pink 



Denver 



Dorner's Surprise 



Fairy Queen 



Gloria 



Golden Glow 



Guy AUwood 



Hilda 



Katrine 



Laddie 



Marjorie 



Matchless 



Matchless, Pink 



Multiflora 



Nina Brener 



Rosalind 



Rose Charm 



Royal 



Spicy White 



Virginia 



Ward, Boston 



Ward, Mrs. C. W. 



Ward, New Deal 



Ward, Variegated 



Wardelia 



Alternaria Spot, Blight and Canker 



The reaction to Alternaria blight of the many varieties of carnations current 

 during the progress of these studies was determined from the amount of infec- 

 tion developing on the plants in the field. The contrasts in susceptibility were 

 obtained by counting the number of infections on the stems, foliage, and floral 

 parts of the flowering shoots which were harvested at regular, brief intervals 

 up to early October and after the earliest frosts. Toward the end of the season 

 the very susceptible varieties usually were destroyed by blight. Contrasts in 

 the reaction of the varieties were shown by calculating the average number of 

 infections per flowering shoot for each variety for the season and applying the 

 number to a certain arbitrary range of infections per stem for each particular 

 degree of susceptibility. The range for each classification necessarily was varied 

 somewhat from year to year. The contrasts in the reaction of the varieties to 

 Alternaria blight are purely relative and based on conditions in a limited geo- 

 graphical area. They are supported by extensive observations among plantings 

 of growers and by the experience of growers in eastern New England over a 

 period of several years. The varieties studied were limited to those current to 

 the period from 1928-1940, most of which are now obsolete (Table 13). 



The records of the pedigree of named carnation varieties are very incomplete 

 and in many instances totally lacking. Too frequently varieties are announced 

 as hybrids of unnamed seedlings. The earliest published accounts of carnation 

 blight mention Enchantress and Mrs. Thomas Lawson as very susceptible. The 



