insecticides and Fungicides 



429 



ments of the ingredients; how to compound and nse them 

 is the subject of many bulletins and popular articles, to 

 which the reader is referred (also previous pages). 

 Insecticides 



Arsenate of lead. 



4-10 lbs. to 100 gals, water. 

 Paris green. 



Used in place of arsenate of lead on potatoes, usually 

 combined with bordeaux mixture. 

 Hellebore. 



4 oz. to 2 or 3 gals, water. 

 1 lb. to 5 lbs. flour or slaked lime. 

 Kerosene emulsion. 



% lb. soap, 1 gal. water, 2 gals, kerosene; dilute with 

 5-7 parts water for use on dormant trees, and with 

 10-15 parts for plant-lice on foliage. 

 Carbolic acid emulsion. 



1 lb. soap, 1 gal. water, 1 pint crude carbolic acid ; dilute 

 with 30 parts water for use against root-maggots. 



Tobacco. 



Nicotine is used in many forms and preparations. 

 Whale-oil soap. 



1 lb. soap to 5-10 gals, water. 

 Miscible oils. 



Preparations are on the market; for use specially against 

 scale insects on woody plants. 

 Lime-sulfur. 



Several f ormultTe ; it can be purchased in the prepared dry 

 state ; used specially against scale insects on trees. 

 Fumigation. 



Greenhouses and hotbeds may be fumigated with tobacco 

 preparations, or with the deadly hydrocyanic acid gas. 



Fungicides 



Bordeaux mixture. 



A standard fungicide, the use of which is now well under- 

 stood ; it may be purchased in prepared dry form. 



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