10 MHJSC. PUB. 52 6, 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-oil soap 1 tablespoonful. 



Water 3 tablespoonfuls. 



Carbon disulfide 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, in a 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 (CC1 3 N0 2 ) is a heavy, colorless, pungen, noninflam- 

 mable liquid manufactured in the United States. It is obtained by 

 subjecting picric acid to the action of chlorine. 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 

 garden symphylids. 



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. 



The operator should wear a gas mask as a protection against 

 the irritating fumes. 



