10 MISC. PUB. 526, U. S. DEPT. OF AGRICULTURE 
An emulsion of carbon disulfide is used for the control of white 
grubs, including larvae of the Japanese beetle, in the lawn and flower 
border. ‘The emulsion contains— 
Resin: fish-oi> soape ss. S22 3 oe ae ee eee 1 tablespoonful. 
Wiater ko Sass 2 ee Ses Ea en aes eee 3 tablespoonfuls. 
Carbon=disuliide=e2s2 2 aa if __. 10 tablespoonfuls. 
Place the soap and water in a quart bottle and shake until the solu- 
tion is uniform. Then add the carbon disulfide and shake for 1 or 2 
minutes or until a creamy emulsion has formed. 
To treat the soil, stir 4 teaspoonfuls of this emulsion into a gallon 
of water, or the entire quantity into 11 gallons of water, and apply 
with a sprinkling can at the rate of 3 pints per square foot. Carefully 
measure the area to be treated and apply the emulsion uniformly 
without excess in any part, otherwise injury to grass roots or other 
plants will result. 
If the lawn is kept moist for several days prior to the application 
of the insecticide, the grubs will tend to feed near the surface, where 
they can be reached by the emulsion. 
Caution.—Because of its inflammability and poisonous nature, 
the greatest caution should be used in handling carbon disulfide. 
It should be kept in tightly closed containers, ina cool place, and 
away from fire, lighted cigarettes, and hot pipes. Because of the 
fire hazard, this chemical cannot be shipped by mail or express. 
Inhaling the gas causes dizziness and nausea, and the inhalation 
of large amounts is deadly. Some bureaus of the Department 
have discontinued the use of carbon disulfide for any purpose, and 
have issued regulations to that effect. The foregoing description 
of the chemical and the formula for compounding it with other 
substances must not be interpreted by the employees of those 
bureaus as justification for its use. These are included as a mat- 
ter of general information to the public. 
Carbon disulfide is manufactured in this country and is obtainable 
in small quantities in bottles or cans and in large quantities in steel 
drums. 
CHLOROPICRIN 
Chloropicrin (CCl,NO,) is a heavy, colorless, pungent, noninflam- 
mable liquid manufactured in the United States. This compound was 
used in the first world war as a lethal, tear, and vomiting gas. It has 
also been used for killing rats in ships. 
Chloropicrin is used as a soil disinfectant for various disease or- 
ganisms and nematodes in greenhouses and potting soil, and in small 
field areas where valuable crops are to be grown. When so used it 
also acts against other soil insect pests, including white grubs and the 
garden centipede (symphylid). 
It destroys all plant growth in the immediate area. It is intro- 
duced into the soil by means of a special applicator. 
It is applied at different concentrations according to the pests in- 
volved. Full directions for the use of this fumigant are usually fur- 
nished by the manufacturer. 5 
The operator should wear a gas mask as a protection against 
the irritating fumes. : 
