326 Report of the Horticulturist of the 



Table IT shows the average percentage of mildew for each series 

 and treatment for three seasons. 

 Tarlk II. — Average Percentages of Mildkwed Fruit fob Three Seasons. 



Fungicide. Series I. Series II. Series III. 



Bordeaux 54.9 54.4 70.5 



Potassium sulphide: 



1-2 



1-3 



Formalin: 



1-1 



1-2 



1^ 



Cheeks 



Lysol : 



1-1 



1-2 



1-4 



A comparison of the averages in Table II shows that potas- 

 sium sulphide treatment, 1 oz. to 2 gals, water, gave the best 

 results in all three series, the best result being in Series I where 

 spraying was begTin very early. This shows 40 per ct. less mildew 

 than the check rows do. A weaker solution of the same material 

 gave the next best results and here again the very early treatment 

 of Series I is most favorable, being 23 per ct. better than un- 

 treated. 



The results with lysol are promising, the strongest solution, 

 1 oz. to 1 gal. water, reducing the amount of mildew 18 per ct. 

 "With formalin, the treatment in Series I, using 1 oz. to 1 gal. 

 water, was much the best, reducing the amount of mildew 14 per 

 ct. In most other cases the tests with formalin rank mth the 

 results obtained from the use of Bordeaux mixture, which in 

 Series 11 only is better than the untreated rows. In Series I 

 and Series III the tests with Bordeaux mixture actually show a 

 larger percentage of mildew than do the check rows. With the 

 exception of Bordeaux mixture in Series II the very early treat- 

 ments of Series I gave the best results with all tests. 



The cost of the material for the remedy giving the best results, 

 potassium sulphide, 1 oz. to 2 gals, water, is about three tenths 

 of 1 cent per bush for seven applications per season. 



