The Black Rot of the Grape and Its Control. 



405 



Trailers were used throughout the season. (See Figs. 103 and 104). 

 The trailers were two in number and consisted of twenty feet of three- 

 eighths inch hose, with extension rod three and one-half feet long and a 

 single Mistry Junior nozzle on the end. Repeated trials, which were 



Fig. 106. — Unsprayed. 



Photo. Aug. 31, 1938 



Part of vine in next adjacent row {check) to one shown 

 in Fig. 103 



made for the purpose, showed that a trailer of this kind with one nozzle 

 would do as thorough work as a stationary arrangement and two or 

 three nozzles. By the use of the trailers the amount of liquid used was 

 reduced from 80 to 50 gallons per acre — a great saving when considered 

 from a commercial standpoint. 



