New York Agricultural Experiment Station. 469 



Fostite is a patented fungicide. Several have reported on it 

 favorably, but as with Bordeaux mixture the reports were not 

 based upon proper experiments. W. Davison* used copper sul- 

 phate solution on one-half of a lot of rusty plants and Fostite on 

 the other half. The copper sulphate checked the rust but Fostite 

 cured it completely. 



Potassium sulphide: — Beattief found that potassium sulphide 

 checked rust and treated plants produced more flowers than did 

 untreated. H. E. Chitty$ got good results from the use of a 

 spraying solution made by dissolving two pounds of potassium 

 sulphide in forty-five gallons of water. In an address before the 

 Massachusetts Horticultural Society January 2G, 1895, Dr. Hal- 

 eted said,§ ''For carnation diseases potassium sulphide ^ oz. to 

 1 gal. has proved successful." OrpetH reported it a failure. 



Carbolic acid: — Tracht and Son^] found three teaspoonfuls of 

 carbolic acid to a bucket of water to be an effectual remedy. 

 Beckert Bros.** cured badly infested stock by two applications 

 of a 1 per cent, solution of carbolic acid and did no harm to the 

 foliage. 



Copper sulphate and ammonia: — This I believe has been used 

 more generally than any other fungicide. In most cases the fol- 

 lowing formula has been followed: — 



Dissolve one pound of copper sulphate in two quarts of am- 

 monia in a two-gallon jar. When dissolved add another quart 

 of ammonia and stir well. Add one pint of this solution to a 

 barrel of water and spray every two .weeks. 



This formula appeared regularly at the head of the carnation 

 columns of the American Florist from Aug. 9, 1894, to Nov. 17, 

 1894, and for several issues following that of Feb. 2, 1895. Very 

 few have published reports on this fungicide, but from conver- 

 sation and correspondence with florists I learn that it has some- 

 times appeared to be a success and sometimes a failure. Wm. 



• Davidson, W.. Fostite for Carnation Rust. Florists' Exchange, Vol. VII., p. 148. 



t Beattie, W. R., Carnation Rust. Florists' Exchange, Vol. VI., p. '492. 



i Sulphide of Potassium for Carnation Rust. Florists' Exchange, Vol. VI., p. 1016. 



S Halsted. B. D., Fungous Diseases of Ornamental Plants. American Florist, Vol. X., p. 620; 

 also Florists' Exchange, Vol. VII., p. 617. 



Orpet, O. E , Carnation Rust. American Florist, Vol. JX . pp. 513-514. 



1 Tracht, J. A., and Son, Carbolic Acid for Carnation Rust. American Florist, Vol. IX., 

 p. 681. 



♦• Beckert Bros., Carbolic Acid for Carnation Rust. American Florist, Vol. IX., p. 880. 



