INSECTICIDES. 289 



Kerosene-water Mixture (Kerowater). 

 Kerosene and water mixed mechanically may be used in 

 all cases where kerosene emulsion is advised above. The 

 water is placed in one tank, and the kerosene in another, 

 the two being mixed in the spray-nozzle. Any desired 

 j^ercentage of kerosene may be used. Use 10 to 20 per 

 cent for plant-lice. Generally much preferable to kerosene 

 emulsion, but the latter is somewhat safer upon tender 

 foliage. Can be aj)plied only with a special pumj) having 

 a kerosene attachment (same pump may be used for 

 other purposes). Pumps mauufactured b}^ Deming Co., 

 Salem, 0., Goulds Co., Seneca Falls, N. Y., Spray Motor 

 Co., London, Ont. 



Tobacco. 



In Water. — Place old stems aud leaves in a tisfht vessel, 

 cover with hot water, and allow to stand several hours. 

 Dilute 3 to 5 times and apph^ 



Whale-oil Soap. 

 For plant-lice, 1 pound to G to 8 gallons of water. 

 Costs 3 to 5 cents per pound. Manufactured by James 

 Good, Philadelphia, Pa., Leggett & Bro., 301 Pearl St., 

 New York, and W. H. Owen, Catawba Island, Ohio. 

 Mr. Good is now making a soap containing tobacco which 

 seems superior for soft-l)odied Jarv^. 



Pyrethrum or Insect-powder. 

 N'ot poisonous to man in ordinary quantities, and there- 

 fore used against household pests, used either as powder 

 or spray. Burn in room to destroy mosquitoes. Used in 

 water at a rate of 1 ounce to 12 gallons, wliich should stand 

 a day before using. Use in hot water for immediate 

 application. Keep in tight cans — deteriorates with age. 



