CONTROL OF INSECTS ATTACKING STORED TOBACCO I 39 



ish, and according to the difficulties of sealing. However, the cost of 

 this type of atmospheric fumigation averages about 12 to 15 cents per 

 1,000 pounds for each application. Vacuum-fumigation costs vary 

 from summer to winter, but usually range from 60 to 75 cents per 1,000 

 pounds, including the cost of the fumigant, labor, electric power, and 

 amortization of equipment. 



Treatment of open or closed storages with pyrethrum powder 

 requires an annual outlay of about 15 cents per hogshead. This fig- 

 ure includes cost of powder, labor, and depreciation of dusting 

 equipment used in making about 20 applications. 



SAFEGUARDS TO BE EMPLOYED IN FUMIGATION 



It is only through well-planned fumigation work that safe pro- 

 cedures can be employed and satisfactory results obtained in the 

 control of tobacco insects. By the exercise of proper care in a definite 

 program of periodic fumigations, heavy losses from insects are averted 

 and the proper protection is given to life and property in the vicinity 

 of tobacco warehouses. Carelessness is responsible for most of the 

 accidents that have been recorded in industrial fumigation. 



Only dependable men, preferably licensed pest-control opera- 

 tors, should be employed in warehouse-fumigation work, and they 

 should be in good physical condition at all times. Operators 

 should abstain from the use of intoxicants while on the job. 



The following safeguards and precautions should be adhered 

 to closely: 



1. All persons and domestic animals must be outside the build- 

 ing when it is sealed and ready for fumigation. 



2. Placards containing a warning and stating that a fumigation 

 is being conducted should be posted at prominent places on the 

 building. 



3. Guards should be placed around the building to prevent 

 persons or domestic animals from approaching too near it. 



4. Gas masks, equipped with satisfactory canisters, should be 

 purchased from the manufacturers of fumigants and worn at all 

 times when the gas is being handled. 



5. Local authorities should be notified and the necessary permit 

 obtained for the fumigation. These officials should be notified 

 again when the work has been completed and the building 

 properly ventilated. 



FIRST AID FOR PERSONS OVERCOME FROM 

 HYDROCYANIC ACID GAS 



Since hydrocyanic acid is widely used in the tobacco industry, it is 

 desirable to include some first-aid information for those who might be 

 overcome by this gas. Detailed information regarding first aid for 

 hydrocyanic acid gas poisoning can be obtained from the United States 

 Public Health Service, the manufacturers of hydrocyanic acid, and 

 many other sources. The directions given in this circular are sum- 

 marized from this published information. 



