SPRAYING AND DUSTING APPARATUS 



77 



Strainers. To obviate the delay caused by nozzles clogging 

 with dirt and sediment, strain all mixtures through a fine copper 

 strainer when filling the spray tank. Have the tank tight and 

 see tha^ it is clean before filling. 



Towers. For orchard spraying it is essential that the operator 

 be high enough to spray all parts of the tree quickly and thor- 

 oughly. Most of the power outfits are built with a tower such 

 as shown in Fig. 37. A very serviceable tower may be erected on 

 a one- or two-horse wagon, at slight expense. It is bolted to the 

 body, so that it is easily removed. The floor should be as high 



FIG. 49. A powder-gun for applying insecticides in dust form. (After 



Weed.) 



as the weight of the wagon and roughness of the land will allow, 

 and the railing should be about the height of the sprayer's waist. 

 Dusting Apparatus. For dusting a few plants a small powder 

 bellows may be used, but where crops are to be dusted a powder 

 gun will be found much more economical. One of the best 

 types is shown in Fig. 49. This has tubes which will direct 

 the dust onto two rows if desired and regulates the amount 

 of dust used. Larger traction outfits mounted on two wheels 

 are made for dusting row crops, but hand work with the smaller 

 machine has usually proven more effective. Larger outfits are 

 also made for carrying in a wagon for dusting orchards. These 

 have been used extensively in the Ozark region, but the use of 

 dust has not proven as effective for most purposes as the spray, 

 though it is superior for some purposes, as for the cotton boll 



