FUNGICIDES, ETC. 283 



Home Boiled Lime Sulphur. 



Caustic Lime (unslaked) . 50 Ibs. 

 Flowers or Flour of Sulphur . 100 Ibs. 

 Water to make . . 50 gallons of finished product. 



This formula requires external heat to prepare, so 

 that it must be prepared either by means of fire or with 

 live steam. If fire is used direct, a large iron kettle that 

 holds over 50 gallons will answer the purpose. If steam 

 is available, a wooden tank or barrel can Be used. Make 

 the sulphur into a thick paste with either warm or cold 

 water. Put the lime into the kettle or barrel and pour 

 the sulphur paste over it. As soon as slaking 

 begins, add more water until 15 or 20 gallons are in 

 the receptacle. As soon as slaking and mixing is over, 

 make up to 50 gallons. Bring to a boil and keep 

 boiling for one hour. The material should be kept 

 well stirred, especially during the early stages of the 

 process. 



The finished product should be strained at once into 

 a barrel or other container, and is regarded as a stock 

 solution. This material should have a specific gravity 

 of about 1-24 or 28 Beaume scale. 



Commercial Boiled Lime Sulphur. This material is 

 the same as above, only that it is prepared by manu- 

 facturing chemical companies and put upon the market 

 as a highly concentrated form. The commercial article 

 will usually have a specific gravity of about 1-28 or 

 about 32 Beaume scale. 



Stock solutions of lime-sulphur, either home-made 

 or commercial, should be kept in closed containers to 

 prevent chemical changes due to contact with the air. 



The amount that the stock solutions should be 

 diluted for treatment of plant diseases varies according 

 to season and tenderness of foliage. As no two stock 

 solutions are necessarily of the same strength, we have 

 to rely upon a density test in order to dilute our sprays 

 intelligently. This is done with a little instrument 

 known as a hydrometer (which may be obtained from 

 any large chemical supply house). 



