The Spraying of Orchards. 



131 



same variety whicli received no treatment. The photographs from 

 which the illustrations were made were taken October- 18th. The 

 entire loss of foliage, even though it occurs but a week or two earlier 

 than under normal conditions, must weaken the tree to a certain 

 extent, and the earlier this loss takes place the more will the tree 



17. — German prune, not sprayed. 



be injured. There is nearly as much difference in the extent to 

 which the several varieties of plum foliage are attacked by leaf 

 spot, as in the case with the fruit and the fungus which causes the 

 rotting. 



The foliage also shows much difference in the powers of the 

 varieties to resist disease. Fellenberg and German Prune had lost 

 all their leaves from the check trees, while the sprayed trees still 

 retained their leaves in an almost perfect condition. Bradshaw was 

 also seriously affected. Coe's Golden, Jefferson and Niagara 



