CARNATION WILT DISEASES 



17 



Table 5. Effect of Chemical Solutions on Rooting of 

 Virginia Rose Carnation Cuttings. 



Treatment (15 Minutes) 



Percent 

 Well Rooted 



Percent 

 N'ot Rooted 



Mercuric bichloride 1-1,000 5 minutes* 

 Methylene Blue 1-3,000 



Malachite Green 1-25,000 

 Orange Helione 1-200 



No Treatment 



*Thoroughly washed after chemical treatment and then trimmed. 



Table 6. Effect of Solutions of Malachite Green on 

 Rooting of Carnation Cuttings. 



Treatment 

 (15 Minutes) 



Percent Rooted 



Rinsed in Water 



Percent Rooted 



Not Rinsed in Water 



Peter 

 Fisher 



Puritan 



Nina Olivette Peter Puritan Boston 

 Brener Fisher Ward 



Table 7. Effect of Chemical Solutions on Rootings of Puritan- 

 Carnation Cuttings. 

 Cuttings previously immersed in a water suspension of spores of 

 Alternaria Dianthi and Fusarium Dianthi. 



Treatment (1 Hour) 



Potassium Permanganate 1-1,000 

 Methylene Blue 1-3,000 

 Malachite Green 1-25,000 

 Water 



Malachite green, in 1-1,000 and slightly weaker solutions, was harmful to 

 rooting. Frequently, the type of rooting following immersion in malachite 

 green solutions 1-20,000 and weaker was not satisfactory; at other times no 

 injurious eflfect was shown (Tables 5, 6, 7, 8, 9). The root-inducing effect and 

 the greater vigor of the cuttings associated with the use of potassium perman- 

 ganate solution was not shown with malachite green. 



When cuttings were immersed in a 1-1,000 solution of methylene blue, the 

 rooting was not satisfactory. Sometimes there was no harmful effect from a 

 1-3,000 solution (Tables 5, 7). The results of immersing untrimmed carnation 

 cuttings for 5 minutes in a 1-1,000 solution of mercuric bichloride, followed by 

 washing, trimming, and rinsing in fresh water, were inconsistent (Tables 5, 9). 



