MAINE AGRICULTURAL EXPERIMENT STATION. TQIO. 43I 



would be large or where the user has had some experience or 

 training in similar lines of work its preparation may well be 

 attempted. Before doing so it would be well to obtain and read 

 Bulletin 99 of the Pennsylvania Station, State College, Pa., and 

 Bulletin 320 of the New York Station, Geneva, N. Y. A kettle 

 or some form of cooker is necessary and, whether one prepares 

 his own concentrate or buys the ready prepared, some form of 

 specific gravity apparatus as the Baume hydrometer for testing 

 the strength of the concentrated mixtures is essential. These 

 latter may be obtained from various dealers in scientific appa- 

 ratus. Those used by this Station were purchased of the Bausch 

 & Lomb Optical Co., Rochester, N: Y. A pamphlet describing 

 their use comes with the instruments, or may be obtained free 

 on request. The cost for the complete hydrometer outfit need 

 not exceed $i.oo to $1.25. 



Professor Whetzel and his associates at Cornell University 

 as the result of their studies and experiments have done much 

 to stimulate interest in this class of fungicides. The following 

 method of preparing the concentrated mixture is adapted from 

 a paper read by Professor Whetzel before a recent meeting of 

 the New York State Fruit Growers' Association, and is based 

 on the recommendations of Professor Cordley of the Oregon 

 Station, who has probably done more than any one else to de- 

 velop lime-sulphur spraying for fungous diseases, especially on 

 the Pacific coast.* 



HOME-BOILED CONCENTRATED LIME-SULPHUR, EORMULA 4. 



Sulphur (best finely ground) no pounds 



Fresh stone or lump lime 55 



Water to make 60 gallons 



Caution. Must be greatly diluted for use on 

 apple foliage, see below. 



Slake the lime in the kettle, make a paste of the sulphur with 

 a little water, then add this paste and the remainder of the water 

 to the lime solution in the kettle. Boil 30-45 minutes or until 

 the sulphur is dissolved and then after the sediment has been 

 allowed to settle pour ofif the clear, amber liquid which should 

 be approximately 45 gallons and test about 30° Baume. The 



*Cordley, A. B. Oregon Exp. Sta. Bui. 108, p. 16, 1910. 



