PUMIGATION OF FRUIT TO DESTROY JAPANESE BEETLE 



15 



ically controlled by an electric thermostat, which will maintain a 

 constant temperature in the room during treatment. 



Caution. — The vapor of carbon disulphide is highly inflammable. 

 Great care should be taken in isolating from the fumigation cham- 

 ber all fires, electric motors, and other sources from which a spark 

 or fire might originate, and anything that would cause a tempera- 

 ture higher than the 180° F. in the evaporating coils. All holes 

 made for the passage of pipes or wires through the walls of the 



Figure 12. — Pouring carbon disulphide into the evaporating pan at the fumigating 



plant at Hamnronton, N. J. 



house must be tightly sealed. Electric motors for driving the fans 

 and circulating the hot water must be outside of the fumigation 

 room, and the hot water that circulates through the pipes in the 

 evaporating pan or the heating unit should never be above 180°. 

 The vapor of carbon disulphide, while not highly toxic to man, 

 should not be inhaled extensively. 



Dosage. — Carbon disulphide should be used at the rate of 10 pounds 

 to 1,000 cubic feet of space. It should be volatilized rapidly, so 

 that the full concentration may be obtained in about 15 minutes. 



