Insecticides. 



17 



Sulphur and whale-oil soap wash, continued. 



for a week. When wanted for use, mix 1 pound of the com- 

 pound to a gallon of water, and apply as a spray at a tem- 

 perature of 130° Fahrenheit. Used for various burrowing 

 larva?, as the gooseberry fruit-worm and the currant borer, 

 as a repellent. 

 Tobacco. — Used in the following ways : 



1. Tobacco-water, used with whale-oil soap. 



2. Dust, 



3. Fumes. Burn dampened tobacco stems. 



4. Nicotyl. Steep tobacco-stems in water and evaporate 

 the water. 



5. Tea. or common decoction. Boil the stems or dust 

 thoroughly, and strain. Then add cold water until the decoc- 

 tion contains 2 gallons of liquid to 1 pound of tobacco. 



Whale-oil soap.— 1 pound whale-oil soap to 5 gallons of water. 

 For mealy bugs and similar insects. It will injure some ten- 

 der plants. 



White hellebore. — A light brown powder made from the roots of 

 the white hellebore plant {Ycratmm album), one of the lily 

 family. It is applied both dry and in water. In the dry 

 state, it is usually applied without dilution, although the 

 addition of a little flour will render it more adhesive. In 

 water, 1 ounce of the poison is mixed with 3 gallons. Helle- 

 bore soon loses its strength, and a fresh article should always 

 be demanded. It is much less poisonous than the arsenites. 



The advent of spraying marks a new era in 

 horticulture. 



