18 



MASS. EXPERIMENT STATION BULLETIN 427 



Cuttings so treated usually rooted less than those immersed in water or not 

 treated at all. Injury seemed to occur even though, after the treatment and 

 rinsing in water, the basal portion of the stem was cut away to the next node 

 before the cutting was planted in sand. For this purpose the use of this material 

 in practice would be hazardous. 



Table 8. Effect of Chemical Solutions on Rooting of Nina 

 Brener Carnation Cuttings and Control of Disease. 

 Cuttings previously immersed in water suspension of spores of 

 Alternaria dianthi and Fusarium dianthi. 



Treatment 

 (15 Minutes) 



Percent 

 Rooted 



Percent Infected 



Rooted 



Total 



Malachite Green 



1-20,000 



1-30,000 - 



1-40,000 



No Treatment (Water).. 



Table 9. Effect of Chemical Solutions on Rooting of Nina 



Brener Carnation Cuttings and Control of Disease. 



Cuttings previously immersed in a water suspension of spores of 



Alternaria dianthi and Fusarium dianthi. 



Percent Rooted 



Treatment 

 (15 Minutes) 



Good 



Poor 



Percent Infected 



Rooted 



Not 

 Rooted 



Malachite Green 1-25,000 56.0 8.0 43.7 73.3 



Same, washed ..- 46.1 23.0 33.3 74.9 



Malachite Green 1-25,000 



Vatsol 2-25,000 53.8 11.5 5.8 55.5 



Same, washed .- 64.0 8.0 5.5 57.1 



Malachite Green 1-40,000 44.0 8.0 23.0 50.0 



Same, washed 46.1 15.3 12.5 60.0 



Malachite Green 1-40,000 



Vatsol 2-25,000 33.3 4.1 11.1 53.3 



Same, washed 64.0 4.0 0.0 85.0 



Mercuric Bichloride 1-1,000* 46.1 15.3 18.7 50.0 



Same, plus Vatsol 2-25,000* 46.7 8.3 7.7 27.2 



Water 88.0 0.0 68.1 i2,.i 



Water** -. 88.0 8.0 2.2 100.0 



* Trimmed and washed after treatment. 

 ** Not inoculated. 



Vatsol added to improve wetting. Supplied by American Cyanamid and Chemical Corp. 

 Pittsburgh, Pa. 



Preliminary tests with organic fungicides indicate the value of Arasan and 

 Fermate* on the control of disease (Tables 10 and 11). 



*Tetramethylthiuram disulfide and ferric dimethyldithiocarbamate respectively. 



