APPLYING MATERIALS 



351 



a minimum of material. To send the material to extreme 

 heights, give a sudden upward fling or flirt of the pipe at the 

 top of the regular stroke. For very high trees, an extension 

 of the discharge pipe may be needed. The parts of the tree 

 close to the ground and near the machine are most likely to be 

 missed. These may be covered by a horizontal blast to the 

 rear as the machine leaves the tree. 



Regulate by the feed-control lever the amount of material 



{Niagara Sprayer & Chemical Co.) 



Fig. 136. A self-directing duster for use on peach and other relatively 

 small trees. Its adequacy and economy are not yet fully determined. 



used. Since dusts are expensive, it is important that as little 

 as possible be wasted. It is just as important to use enough 

 to do a good job. A check on the quantity being used may be 

 obtained by recording the amount of material put in the hopper 

 and dividing it by the number of trees covered. The quantity 

 per tree varies with the size of the tree. The Niagara Sprayer 

 and Chemical Company has compiled the data in Table 42 for 

 average conditions. The quantities are subject to change to 

 meet individual requirements. 



