24 



not Soft Scale is present and if found in even small 

 numbers, the tree should be sprayed. 



Purple Scale 



Purple Scale attacks tlie tree as well as the fruit and 

 if left alone will kill a voune' tree in one or two sea- 

 sons. The insect is controled in the same manner and 

 with the same spraying material we have reconnnend- 

 ed for Soft Scale. 



In the fall after the fruit has been gathered, every 

 orchard should be given a thorough sprajang with 

 one of the three oil emulsions mentioned with the ad- 

 dition of three or four pounds of whale oil soap to 

 every fift}' gallons of spraying solution. 



If Rust Mite and Red Spider have been much in 

 evidence during the growing season, another spraying 

 with Lime Sulphur shouid be made during the winter- 



strength 1 to 35. 



SPRAYERS 



Wherever possible a power sprayer should be used 

 in order to get tlic necc;ssary pressure from 150 to 200 

 pounds. The small knapsack sprayer or any other 

 small sprayer that can be carried around is unsatis- 

 factory for the reason that not as high pressures are 

 obtained to carry the spraying material in a fine mist. 

 If the orchard is not large enough to warrant the own- 

 ers investing in a power sprayer, several small orchard 

 owners may combine and buy a power sprayer to- 

 gether. In this case care should be exercised; if any 

 communicable disease is present in an orchard the 

 sprayer, wagon, team and men should be disinfected 

 before leaving such orchard with either formalin so- 

 lution 1 to 120 or with bichloride of mercury solution 

 1 to 1 000. 



