INSECTICIDES. D 



purpose, the plant is covered with a tight receptacle, and 1 

 fluid dram (60 drops or minims) is sufficient for a space 

 equal to about 6 to 8 cubic feet. 



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 grain-eating insects. 



Burning. — Larvse which live or feed in webs, like the tent- 

 caterpillar and fall web-worm, may be burned with a torch. 

 The lamp or torch used in campaign parades finds its most 

 efficient use here. 



Carbolic acid and soap mixtures. — 1 pint crude carbolic 

 acid ; 1 quart soft soap ; 2 gallons hot water. Mix thoroughly. 

 This wash is used for borers, and for scale-insects. Apply 

 with a cloth or soft broom. Use only on dormant wood. 



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

 100 parts of water. For root-insects. 



Carbolic acid emulsion. — 1 pound hard soap or 1 quart soft 

 soap dissolved in 1 gallon boiling water, and add 1 pint of 

 crude carbolic acid, and emulsify by agitation. One part 

 is used in 30 parts of water for cabbage-maggots and other 

 root-insects. 



Carbolized plaster. — Stir 1 pint of crude carbolic acid into 

 50 pounds of land plaster. Or, quicklime 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. This is used by some peach and plum 

 growers for the curculio, with apparent success, but it is of 

 doubtful efficiency. 



Carbon bisulphide. — See Bisulphide or Carbon, p. 4. 



Cement -wash. — 5 tablespoonfuls hydraulic cement to 1 

 gallon sour milk or buttermilk. Mix, and apply at once 

 to base of peach trees as remedy for borer (N. Carolina 

 Experiment Station). 



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

 a pole. Remedy for aphis, but little used. 



Copperas (sulphate of iron) . — 1 ounce of copperas to a pail 

 of water is sometimes effective in destroying root-insects. 



