Insecticides. 9 



Arsenitesandfungricides, continued. 



narily used when they are combined with the Bordeaux 

 mixture. The free lime in the mixture combines with the 

 soluble arsenic, w^hich is the material that injures the foliage, 

 and the combination is thus made quite harmless. 



London purple and Paris green should rarely be applied 

 with the ammoniacal carbonate of copper, as the ammonia in 

 the latter dissolves the arsenic, making the combination 

 caustic. The addition of sulphate of copper to the arsenites 

 also increases injury. 



Bait. — 1. Paris green or London purple, 1 ounce, chopped grass 

 or leaves, 8 ounces, and enough syrup to allow the mass to be 

 worked into balls. For wire- worm beetles, crickets, katy- 

 dids, etc. 



2. Bran 40 pounds, middlings 15 pounds, arsenic 20 pounds, 

 cheap syrup 2 gallons. Mix in soft water to a paste. For 

 grasshoppers. 



Bisulphide 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, caus- 

 ing the fumes to permeate the soil in all directions. In loose 

 soils it is very destructive to insects. It is also inserted in 

 tight receptacles to kill such insects as pea-weevil and 

 museum pests. 



Bisulphide of carbon and kerosene.— 1 part of bisulphide of carbon 

 mixed with from 5 to 20 parts of kerosene will produce vapor 

 sufficient to kill many gi'ain-eating insects. 



Blue vitriol or copperas.— 1 ounce of copperas to a pail of water 

 is sometimes effective in destroying root-insects. 



Coal-tar fumes. — Burn rags coated with coal-tar attached to a 

 pole. Remedy for aphis. 



Carbolic acid and soap mixture.— 1 pint crude carbolic acid, 1 

 quart soft soap, 2 gallons hot water. Mix thoroughly. This 

 wash is used for borers, and for plant-lice. Apply with a 

 cloth or soft broom. 



Carbolic acid and water. — Add 1 part of acid to from 50 to 100 

 parts of water. For root-insects. 



