Insecticides. 9 



Arsenites (London purple) continued. 



fungicides, and both insects and plant diseases in this man- 

 ner may be combated at the same time. An ounce of 

 the arsenites may be added to ten gallons of Bordeaux 

 mixture for potatoes, and other combinations will occur to 

 the operator. The arsenites are also sometimes added to 

 soap and other washes. 



Bait. Paris green or London purple, i ounce ; chopped 

 grass or leaves, 8 ounces, and syrup enough to allow the 

 mass to be worked into balls. For wire-worm beetles, 

 crickets, katydids, etc. 



Bisulphide of carbon. A thin liquid which volatilizes 

 at a very low temperature, the vapor being very destruct- 

 ive 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. It is also inserted in tight receptacles to kill 

 such insects as pea-weevil and museum pests. 



Blue vitriol, or Copperas. i 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. i pint crude carbolic acid, 

 i 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 i part of acid to from 50 to 

 TOO parts of water. For root insects. 



Carbolized plaster. Stir i pint of crude carbolic acid into 

 50 pounds of land plaster. Or, quick lime may be slaked 

 with the acid. The powder is thrown over the tree when 

 the dew is on, as a remedy for the curculio. It should be 

 applied profusely. 



Glue and arsenites wash. Common glue, i lb., soaked a 

 few hours in cold water and then dissolved in J^ gallon 



