CONTROL OF INSECTS IN TOBACCO 



19 



protection from low temperatures, but in them the cigarette beetle is 

 often a more important pest than the tobacco moth. Warehouses of 

 this type may be one story or several stories, but all have doors, win- 

 dows, and/or ventilators (figs. VI and 13). The buildings vary 

 greatly in size — from 25,000 to over 1,000,000 cubic feet. Many 

 closed warehouses consist of long rows of sections separated by brick 

 fire walls. They sometimes contain over 100,000,000 pounds of to- 

 bacco. The cost of labor in moving such large quantities of tobacco 

 to fumigation chambers makes chamber fumigation impractical. 

 The only feasible method of insect control, therefore, is to treat each 

 warehouse. Warehouse fumigation was required in the past. 



II if B 



*&m&:mm 



Figure 12. — A closed-type tobacco warehouse. Note two-story brick construction 



and numerous windows. 



Mw:fi>m^§ 



Figure 13. — A large group of closed-type tobacco warehouses. 



