INSECTICIDES, FUNGICIDES, AND SPRAYING 215 



Extension Poles and Spray-Rods. For reaching the tops 

 of trees bamboo poles are used, which are fastened alongside 

 of the end of the hose. The nozzle is inserted into the 



FIG. 31. Spray "Ys." A, Four-branched "Y" of Vermorel nozzles. 

 B, Two-branched "Y" of Cyclone nozzles. These "Ys" may be 

 used in the place of single nozzles. They cause a more rapid dis 

 charge of the spray mixture. 



hose, so that the pole serves the purpose of making the 

 spray end of the line rigid. 



Spray-rods are now made, however, which make it easier 

 to handle the hose. The spray-rods consist of aluminum 

 tubes, inside of bamboo poles. One end of the rod is at- 



