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, 1 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. Poison- 1 

 baits are used against cutworms and grasshoppers. See Criddle 

 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 insect;.. 

 Against weevils infesting stored grain and corn, carbon bisulfi 1 

 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 sprinkliii ^ 

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

 Let the fumigation continue for at least twent^'-four hours. 



Carbolic acid and soap mixtures. — One ounce crude carbolic aci^l ; 

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

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

 only on dormant wood. 



Carbolic acid emidsion. — 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. 



Criddle mixture. — Mix 1 pound of paris green with I barrel of horsa 

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

 For use against grasshoppers. 



