APPLE SCAB 



47 



At the first spraying after the blossoms had fallen, May 28, 

 4 onnces of Paris green were added to each 50 gallons of Bor- 

 deaux mixture for the codling-moth. This experiment is there- 

 fore a good illustration of a combined treatment for fungi and 

 insects. 



The apples, when gathered, showed the following results : 

 Apples from unsprayed check trees, as well as from the 

 isprayed trees, were examined one by one and counted. The 

 first table compares the total number of apples unsprayed and 

 fepl'ayed. 



Free from spots and worms 

 .Spotted .... 

 Wormy .... 



Of the unsprayed, 91/3 per cent, were graded as No. I's. 

 Of the sprayed, 53 per cent, were graded as No. I's. 



The following table compares the effects of the different modes 

 of treatment of the sprayed trees on the spot disease : 



Plot A. Plot B. Plot c. Plot D. 



Free from spots . 95 per cent. 99 per cent. 96 per cent. 99 per cent- 



These results show the efficiency of the Bordeaux mixture 

 in preventing the disease, with but little difference between the 

 different strengths and times of applying it. 



Experiment II. — Season of 1S96, on Baldwin apples: 



Plot I. Trees sprayed twice with i to 10 Bordeaux mixture, 

 once before blossoming and once after. 



Plot 2. Trees sprayed with i to 10 Bordeaux mixture once 

 after blossoming. 



vCheck trees unsprayed. 



'Result : 



Free from spots 

 .Spotted . 



Unsprayed. Sprayed. 



Plot 1. Plot 2. 



32 per cent. 90 per cent. 82 per cent. 

 68 " 10 " 18 " 



This shows a slight gain in favor of the trees sprayed twice. 

 In 1896 another disease was very prevalent on apples, and 

 -.together with the spot disease rendered much of the crop verv 



