1 6 The Horticulturist' s Rule- Book. 



Sulphur. Fumes of sulphur is, destructive to insects, but 

 it should be carefully used or plants will be injured. For 

 greenhouse use, few insecticides are superior. The sul- 

 phur should be evaporated over an oil stove, until the 

 room is filled with the vapor. The sulphur should never 

 be burned, as burning sulphur kills plants. 



Sulphur and snuff. i Ib. of flowers of sulphur, i Ib. of 

 scotch snuff, i Ib. of quicklime, */% Ib. of lamp-black, i 

 Ib. of soft soap, with sufficient water to make them into 

 the consistency of paint. Wash every branch, from the 

 ground upwards, with a common paint brush before the 

 bloom-buds begin to swell. For plant lice. 



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 de- 

 coction contains 2 gallons of liquid to i pound of tobacco.' 



Whale oil soap. i pound whale oil soap to 5 gallons of 

 water. For mealy bugs and similar insects. It will injure 

 some tender plants. 



White hellebore. A light brown powder made from the 

 roots of the white hellebore plant ( Veratrum atbuni], one 

 of the lily family. It is applied both dry and in water. 

 In the dry state, it is usually applied without dilution, al- 

 though the addition of a little flour will render it more 

 adhesive. In water, i ounce of the poison is mixed with 

 3 gallons. Hellebore soon loses its strength, and a fresh 

 article should always be demanded. It is much less poi- 

 sonous than the arsenites 



