New York Agricultural Experiment Station. 313 



From a study of Table II we see that, with the exception of 

 Bordeaux mixture, the very early treatments gaA^e the best re- 

 sults. Where the treatment with potassium sulphide, 1 oz. to 

 3 gals, water, was begun very early only 5 per cent of the fruit 

 mildewed. Where it was begun medium early there was three 

 times as much mildewed fruit, while in the treatment begun late 

 there was a little more than two and one-half times as much. 

 The bushes treated very early with potassium sulphide, 1 oz. to 

 2 gals, water, yielded 6.6 per cent of mildewed fruit and those 

 where the treatments was begun medium early and late gave 

 nearly twice as much. 



Lysol ranks next to potassium sulphide in effectiveness. It 

 was used in Series I only and the bushes treated with 1 oz. to 

 1 gal. water gave 24.5 per cent of mildewed fruit; bushes treated 

 with the weaker strengths gave 56.8 per cent and 37.1 per cent 

 respectively of mildewed fruit. 



The best result with Bordeaux mixture was where the spray- 

 ings were begun medium early and 29.1 per cent of the fruit 

 mildewed. With the very early treatment 37.4 per cent of the 

 fruit mildewed and where spraying was begun late 58 per cent 

 of the fruit mildewed. 



Formalin seemed to have little if any effect in checking the 

 mildew. The bushes in Series I treated with 1 oz. to 1 gal. of 

 water gave 48.8 per cent of mildewed fruit. The amount of 

 mildewed fruit in the other experiments with formalin varied 

 from 52.6 per cent to 78.3 per cent, while the largest amount 

 from the untreated bushes was 78.7 per cent. 



The average cost of the various fungicides is given in the table 



below. 



Table III. — Average Cost of Fungicides. 



rUXGICIDE. 



Lysol 



Formalin 



Potassiiiiu sulphide 

 Bordeaux mixture . . 



Per 



pcmnd. 



Ceuts. 

 65 

 50 

 18 



For One Gallon of Solution. 



1 oz to 



1 gallon 



water. 



Cents. 

 4.06 

 3.125 



1 oz. to 



2 gallons 

 water. 



Cents. 

 2.03 

 1.56 

 0.54 



1 07. to 



3 gallons 

 water. 



Cents. 

 '6!375 



Itoll 

 formala. 



Ceuts, 



0.5 



