MAINE APPLE DISEASES, 387 



on request. The cost for the complete hydrometer outfit need 

 not exceed $1.00 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 rhore than any one else to de- 

 velop lime-sulphur spraying for fungous diseases, especially on 

 the Pacific coast.* 



HOME-BOILED CONCENTRATED LTME-SULPHUR, FORMULA 4. 



Sulphur (best finely ground) no pounds 



Fresh stone or lump lime 55 " 



Water to make 60 gallons 



Caution. Alust be greatly diluted for use on 

 apple foliage, see belozv. 

 Slake the liifie 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 off the clear, amber liquid which should 

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

 liquid may test higher or lower than this, varying with the con- 

 centration, so it should always be tested. The liquid should not 

 be tested tvhile hot but should be cooled to about 60° F. The 

 reading on the hydrometer should be taken at the general sur- 

 face of the liquid at which it is supported. 



If the concentrate is not intended for immediate dilution it 

 should be at once stored in tightly closed containers till ready 

 for use. The amount of dilution will, of course, depend upon 

 the density of the concentrate. The following table supplied 

 by Cordley gives the amount of dilution of concentrated lime- 

 sulphur stock solutions of different degrees of density accord- 

 ing to the Baume scale for winter and summer spraying of apple 

 trees. Only the dilutions indicated in tlie riglit-hand column 

 should be used for trees in leaf. 



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



