VARIOUS INSECTICIDES 293 



mixture combines with the soluble arsenic, which is the material 

 that injures the foliage, and the combination is thus made quite 

 harmless. 



Bait. Vegetable bait. Spray a patch of clover or some other plant 

 that the insects will eat with paris green or some other arsenical; 

 mow it close to the ground, and while fresh place it in small piles 

 around the infested plants. To avoid wilting of the bait, cover 

 the heaps with a shingle or piece of board. 



Bran-arsenic mash. White arsenic, J pound, or paris green, 1 pound; 

 bran, 50 pounds. Mix thoroughly and then add enough water to 

 make a wet mash. 



Sugar or molasses may be added, but is unnecessary. Poisoned 

 baits are used against cutworms and grasshoppers. See GRIDDLE 

 MIXTURE, below. 



Bisulfid of carbon. A thin liquid which volatilizes at a very low 

 temperature, the vapor being very destructive to animal life. It is 

 exceedingly inflammable, and should never be used near a lamp or 

 fire. It is used for many root-insects. It is poured into a hole, 

 which is immediately closed up, causing the fumes to permeate the 

 soil in all directions. In loose soils it is very destructive to insects. 

 Against weevils infesting stored grain and corn, carbon bisulfid 

 is effective at the rate of 5 pounds for each 1000 cubic feet, pro- 

 vided the application is made while the temperature is not below 

 65 F. Make the bins as tight as possible, and after sprinkling 

 the liquid over the grain, cover tightly with gas-proof tarpaulin. 

 Let the fumigation continue for at least twenty-four hours. 



Carbolic acid and soap mixtures. One ounce crude carbolic acid ; 

 1 pound fish-oil soap ; 1 gallon hot water. Mix thoroughly. This 

 wash is used for borers. Apply with a cloth or soft broom. Use 

 only on dormant wood. 



Carbolic acid emulsion. Soap, 1 pound; water, 1 gallon; crude car- 

 bolic acid (90 per cent strength), 1 pint. Dissolve the soap in 

 hot water ; add the carbolic acid, and agitate into an emulsion. 

 For use against root-maggots, dilute with 30 parts of water. 



Carbon bisulfid. See BISULFID OF CARBON, above. 



Griddle mixture. Mix 1 pound of paris green with 1 barrel of horse 

 droppings, and add 1 pound of salt if the material is not fresh. 

 For use against grasshoppers. 



