1<) farmers' bulletin 846. 



or air-tif?ht receptacles for holding the cigars or tobacco is desirable, 

 although not absolutely necessary if care is taken to remove the 

 mateiial when the air is dry. If the material is removed from stor- 

 age when the air is damp, the condensation of moislure may make 

 the tobacco or cigars more liable to mold, or ma}' cause discoloring, 

 staining, or warping of the boxes or containers. 



A large number of cigars placed in cold storage by a manufacturer 

 were kept under observation by the writer. The cigars were not put 

 in containers, the boxes being merely piled on the floor of the cold- 

 storage room. The boxes were removed when the air outside was 

 dr}' and put under presses in a dry room for a time to prevent warp- 

 ing of the covers of the boxes. The treatment proved thoroughly 

 effective in killing all stages of the beetles. The manufacturer re- 

 ported that no injury to the cigars as a result of the treatment was 

 apparent. Different lots were kept at a temperature of about 12° F. 

 for from one to four weeks. 



Although there are certain objections to the cold-storage method 

 of control, such as loosening of the wrappers of fine cigars by sudden 

 changes in temperature, danger of sweating when removed from 

 cold storage, injury to quality from too rapid aging, etc., it has 

 certain advantages and in some cases may be found more desirable 

 than other methods of treatment. "When precautions are taken to 

 prevent sweating, it is evident that the exposure of manufactured or 

 leaf tobacco to cold in a cold-storage room is not more apt to cause 

 injury than the exposure of the same material to low temperatures 

 during winter. 



FREEZING DURING WINTER. 



In localities where severe freezing occurs the doors and windows 

 of warehouses or other buildings where tobacco is stored may be 

 throAvn open at favorable times during the winter and the tobacco 

 subjected to freezing temperatures. This control measure has been 

 employed by tobacco men in different sections of the anmtry, and 

 excellent results have been reported, the degree of success in exter- 

 minating the beetles or checking their increase depending upon the 

 temperatures obtained. Experiments made Avith infested manufac- 

 tured tobacco have shown tliat it may be sterilized easily by this 

 means. 



The modern practice of storing certain classes of leaf tobacco in 

 hogsheads in sheds, giving practically out-of-door conditions and 

 variations of temperature, furnishes an effective means, in cool 

 climates, of reducing injury to leaf tobacco which may be stored 

 in this manner. 



