CONTROL OF INSECTS ATTACKING STORED TOBACCO 



25 



Fku : re IS). — Tobacco warehouse sealed prior to fumigation and cylinders of hydrocyanic 

 acid and air compressor used in fumigation. 



Figure 20. — Installation of %-inch copper piping for use in the application of liquid hydro- 

 cyanic acid. The piping is flexible and can be run along walls or rafters to any desired 

 point. A, Man installing pipes and nozzles ; B, the different attachments for spray nozzles 

 used for applying hydrocyanic acid in warehouses. If piping has been used recently, it 

 should be blown out thoroughly to eliminate pockets of gas, which might be forced out in 

 the face of the workman installing it. 



