12 



FARMERS' BULLETIN 933. 



Unsatisfactory types of apparatus. A pump run by means of gearing 

 attached to the wheels (fig. 15) is not suitable for spraying citrus trees. 

 It often requires as much as 15 gallons to spray a tree, and to apply 

 this amount it would be necessary to spray a part of the tree and 

 then drive the machine a considerable distance to get enough pres- 

 sure in the air tank to continue spraying. This involves too great a 

 waste of time and labor. No citrus grower should purchase such a 

 machine for spraying citrus trees. It is also useless to attempt any 



FIG. 11. These hand-power tank outfits are satisfactory for many groves in Florida. 

 They are durable and do not easily get out of repair. They will supply two leads of 

 hose, and may also be used in making emulsions. (Quaintance.) 



spraying other than a few small trees with a bucket, small com- 

 pressed air, or knapsack pump. 



HOSE. 



The same kind of hose should be used for the barrel pump, the 

 larger lever pump, and the power outfit. This hose should be not 

 less than T-ply if it is known as " wrapped." There is also a hose 

 which is known as " double continuous net weave," which has given 

 satisfactory results. This type is much lighter, and is therefore 

 much easier to handle in a grove than the heavier type. So far, 

 however, there are no indications as to whether the wrapped or the 

 woven hose is superior. It is useless to attempt to spray with ordi- 



