1934] 
SERVICE AND REGULATORY ANNOUNCEMENTS 
11 
Handling after fumigation. — Remove pan and cup from ice bunkers. Replace 
plug with screen, leaving hatches open for aeration. Remove plugs from ice 
drips. Doors must be kept closed or satisfactorily screened to prevent reinfesta- 
tion. 
B. Fumigation of bananas in refrigerator cars with calcium cyanide 
Material. — Calcium cyanide (88 percent). 
Caution. — Observe the same precautions as outlined for liquid hydrocyanic 
acid treatment (3, A). 
Equipment. — Two trays of light wooden construction, 6 to 8 feet long, 2 feet 
wide, and about 2 inches deep. Sufficient building paper to cover the trays and 
hatch openings. Four screens made of cotton netting on light wooden frames 
which will fit tightly in hatch openings. 
Condition of car. — Only refrigerator cars in good condition should be used to 
insure against leaks. 
Temperature. — The temperature inside the car during the period of fumigation 
must be at least 75° F. 
Dosage. — Three pounds of calcium cyanide per car. 
Application. — Remove plugs from the ice bunkers and insert screens. Cove 
the hatch openings with paper and close the hatches tightly on the paper. Plug 
ice drip openings. Cover the trays with paper and apply 1% pounds of calcium 
cyanide as uniformly as possible in each of the trays and place them on the load 
in the doorway of the car. Close door tightly. 
Period of fumigation. — The car must be kept sealed for a period of VA hours 
after the calcium cyanide has been applied. 
Handling after fumigation. — Remove trays and dispose of residue. Open 
screened hatches for aeration. Remove plugs from ice drips. Doors must be 
kept closed or satisfactorily screened to prevent reinfestation. 
C. Fumigation of berries with carbon disulphide 
Material. — A technical, CP., or U.S. P. grade of carbon disulphide should be 
used to fumigate berries. 
Caution. — Observe the precautions mentioned in 1, A. 1. 
Equipment. — It is necessary to have a gastight room, equipped with a hot- 
water heating system to volatilize the carbon disulphide over copper coils, and 
fans to keep the air-and-gas mixture in circulation. A supply of heat should be 
available to keep the room at the required temperature on cool days. 
Temperature. — The water in the coil used for vaporizing the gas must be at 
least 148° F. and should not exceed 180°. The room must be at a temperature 
of 80°, or above, during the period of fumigation. 
Dosage. — Carbon disulphide must be applied at the rate of 1 pound per 100 
cubic feet of space in the room, including the space occupied by the berries. 
Period of fumigation. — The berries must be exposed to the gas for a period of 
2 hours. 
Application. — Crates may be stacked in layers, separated by slats allowing 
ample space between crates for circulation of the gas. The temperature of the 
room should be taken before and after fumigation. When the r water in the 
boiler has reached the proper temperature, close all doors. Start water circu- 
lating through coils of vaporizing pan and turn on the fans. Pour the required 
amount of carbon disulphide through the funnel outside, into the vaporizing pan,, 
and make sure valve is closed. Keep the water circulating through'Uhe coils 
of vaporizing pan for 60 minutes after carbon disulphide has been applied. Keep 
doors closed for 2 hours. Aerate the house before allowing anyone to enter. 
D. Fumigation of berries with ethylene oxide 
Material. — Ethylene oxide in cylinder. 
Equipment. — It is necessary to have a gastight room. 
Temperature. — The temperature of the fruit and the room during the fumiga- 
tion shall be 75° F. or above. 
Dosage. — Ethylene oxide must be applied at the rate of 2 pounds per 1,000 
cubic feet of space, including the space occupied by the berries. 
Period of fumigation. — The berries must be exposed to the gas for a period of 
2 hours. 
Application. — Crates may be stacked in layers, separated by slats allowing 
ample space between the crates for circulation of the gas. Means should be 
available for the introduction of the gas into the room in the required amounts. 
