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 



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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- 



