SPRAYING FOR CITRUS INSECTS AND MITES IN FLORIDA. 



11 



The engine should be not less than 1^ horsepower. It is the con- 

 sensus of opinion that a light engine of 2| or 3J horsepower is pref- 

 erable to one of less power. The engine by all means should be 

 fitted with a good governor. The pump should be fitted with a regu- 

 lator which is accurate, and will take care of the capacity of the 

 pump whether the nozzles are turned on or off. The pressure should 



FIG. 10. A barrel pump is satisfactory for small operations. The spray is directed 

 upwards to hit the white fly infesting the lower surfaces of the leaves. 



not vary if the nozzles are cut off. Both the engine and the pump 

 should be protected from sand by means of canvas curtains on the 

 sides and rear. The wheels raise considerable sand to the height of 

 the engine and pump and the wind may then blow it into the ma- 

 chinery. The writer has known of instances in which machinery 

 unprotected from the sand has been ruined in a single week. 



