The use of plastics is expanding and the field of applica- 

 tion for these materials is practically unlimited. 



The fumigation of closed-type tobacco storages has always 

 been seriously complicated by the necessity for adequate 

 sealing. Time has been an important factor and in the past 

 the labor required to do the job has been excessive. If fumi- 

 gations are to be effective they must be made promptly after 

 the peak of emergence of the insects. Plastic sealing can be 

 applied rapidly and with a minimum of labor. The savings 

 that can be made by the use of this material as compared 

 with other materials are largely attributable to these factors. 

 The cost of material and the equipment necessary for the 

 application do not represent sizable items when over-all cost 

 is considered. 



This type of sealing, although tested only on tobacco ware- 

 houses, may be found practical in other types of storages for 

 other commodities. Plastic materials are extremely adapt- 

 able and the technique of application is simple. Specialized 

 training is not required for their use. 



Issued June 1949. 



For sale by the Superintendent of I >ocuments, l". S. Govi rnmenl Printing Office 

 Washington 25. D. C. - Price 15 cents 



