STATE POMOLOGICAL SOCIETY. 



59 



Treatment. 



Check (not sprayed) . 

 Bordeaux Mixture • . ■ 



as. 3 



79.9 



Although the season was very dry and the per cent of perfect 

 fruit on the unsprayed trees was much higher than usual, the 

 sprayed trees showed an average Increase of nearly forty- two per 

 cent. 



During the season just closed the advantage of spraying was 

 even more marked. The season was very wet and the disease 

 appeared soon after the fruit was formed. As a result the crop 

 was a total failure on trees not sprayed, while on adjacent trees 

 which were treated with Bordeaux mixture there was a good aver- 

 age crop relatively free from disease. 



Now it is not claimed that we know all about the use of Bor- 

 deaux mixture, for there are problems of a most important nature 

 concerning the preparation and application of the material, which 

 are still unsolved. At the present time, I may sum up our know- 

 ledge of the treatment for apple scab as follows : 



(1) Spray the trees early in the season, before the buds expand, 

 with a solution of copper sulphate — one pound to fifteen gallons 

 water. 



(2) Early in May, before the blossoms open, spraj' with Bor- 

 deaux mixture. 



(3) As soon as the fruit "sets" spray a second time with Bor- 

 deaux mixture. (It is well at this time to add Paris green at the 

 rate of one pound to two hundred and fifty gallons of the mixture 

 to destroy the larvte of the coddling moth.) 



(4) Make at least two subsequent applications of Bordeaux 

 mixture at intervals of about three weeks. 



2. Pear Scab. 

 A fungus close)}" related to the one just mentioned is the Pear 

 scab {Fasicladium pyrinum.) This fungus attacks the pear in the 

 same manner as does the apple scab its host, and indeed the resem- 

 blance between the two species is as close that they are often con- 

 sidered identical. It is because of this disease that the Flemish 



