10 INJURIOUS INSECTS OF KANSAS. 



are at work, so that it will come in contact with the bodies at 

 once. It soon loses its power when exposed to the atmosphere. 

 It can also be used mixed with water, one ounce to two or three 

 gallons of water. 



Pyrethrum is especially available for work in gardens, green- 

 houses, and hot-houses, and in the house. Many household pests, 

 as flies, mosquitos, and wasps, may be quickly affected by throw- 

 ing a small quantity of the powder into the air of a room by 

 means of an insect gun or bellows, or by igniting a small quan- 

 tity (a teaspoonful) and allowing it to smoulder (Fletcher). 

 Pyrethrum retails at about 50 cents a pound. 



WHITE HELLEBORE, a vegetable insecticide, being the finely- 

 powdered roots of Veratrum album, of the lily family. Its effects 

 and mode of use are similar to those of pyrethrum. It is espe- 

 cially commended as a remedy for the slugs of the various Saw- 

 flies (see Raspberry- and Rose-slugs). It costs, at retail, about 

 75 cents a pound. 



BI-SULPHIDE OF CARBON, a powerful, highly inflammable and 

 poisonous insect-killing substance. It is very volatile, and its 

 fumes are deadly to insect life. It is especially available for 

 destroying insects attacking stored grain, where the fumes can 

 be made to permeate the contents of a tight bin. In using it, ex- 

 treme care should be taken that no burning substance, lighted 

 lamp, lantern, etc., be brought near it while being used. It is a 

 liquid, being put up in one-pound cans, which retail for about 25 

 cents each. 



Tobacco, benzine, gasoline, carbolic acid, naphthaline, fish-oil 

 soaps, lime, gas-tar, etc., are all insecticides of greater or less value, 

 and available under various conditions. Wherever special reme- 

 dies are recommended in this little manual, directions for their 

 use will be found. 



SPRAYING AND DUSTING. 



The successful application of the Paris green and London pur- 

 ple mixtures and the kerosene emulsion on a large scale to fruit 

 trees and small-fruit bushes and vegetables is a matter of much 

 importance. Spraying outfits are of all grades of effectiveness 

 and price. Anyone purposing to purchase a spraying outfit 

 should write to various firms for their catalogues and lists, and 



