INDUSTRIAL FUMIGATION AGAINST INSECTS 5 



The temperature must be high enough to render the insects sus- 

 ceptible to the fumigant and to allow for its most efficient action. 



The fumigant must be suitable for the building in which it is 

 used and for the contents of the building. The quantity must be 



Figure 5. — Commodities of various types assembled for export on a modern 

 dock. Carload lots of supplies found slightly infested upon arrival by rail 

 are sometimes fumigated beneath rubberized tarpaulins. 



Figure 6. — While industry in general has not found it feasible to promote 

 insect sanitation by introducing a fumigant into the shipping unit as it moves 

 through the packing machinery, this is a method that has been satisfactorily 

 employed. The fumigant, in liquid form, is automatically introduced in each 

 container just previous to the entry of the commodity and the sealing of 

 the container. 



