SPRAYING 153 



effective, and are harder to put it on thoroughly, 

 especially due to the fact that they leave no trace 

 on the tree, and it is hard to tell when a tree has 

 been fully covered. They have no fungicidal proper- 

 ties as the lime-sulphur has. 



A common practice, and one to be indorsed, is to 

 put on a spray of soluble oils in late fall or early 

 winter for the treatment of very light infestations 

 of scale and when fungus diseases are not feared. 

 This will mean principally the treatment of young 

 orchards of one or two years' growth. Or the solu- 

 ble oils may be used for a fall spray on badly in- 

 fested orchards when they can be followed with a 

 thorough spring spraying with the regulation lime- 

 sulphur. This double dose is not too much for bad 

 cases of San Jose scale, and serves as the best gen- 

 eral method of bringing them promptly under con- 

 trol. 



BORDEAUX MIXTURE 



While Bordeaux mixture is the best known of all 

 fungicides, and often of value in peach growing, it 

 has less use here than in apple culture. The changes 

 in the formula have been very few and of a minor 

 nature, showing that Bordeaux mixture is as nearly 

 perfect as such things can be. The mixture is made 

 in various strengths for various purposes, but prob- 

 ably the best formula for spraying dormant peach 

 trees is the standard mixture, as follows : 



4 pounds copper sulphate (blue vitriol), 

 4 pounds lime, 

 50 gallons water. 



To make up the mixture first dissolve the copper 

 sulphate. This process can be very much hastened 



