422 STATE BOARD OF AGRICULTURE. 



homemade product. Those desiring to make their own concentrated 

 lime-sulphur solution may obtain detailed directions by writing to the 

 Entom'ological Department. 



The Agricultural Laws of Micliigan require the manufacturer to 

 state plainly on each package of spray material "the correct names and 

 percentage amounts of each and every ingredient of the insecticide or 

 fungicide having insecticidal or fungicidal properties and the total 

 percentage of inert ingredients present." 



The "strength" or "Beaume Test" in concentrated lime-sulphur may 

 be known from the "Total per cent Sulphur" given on the label of the 

 commercial manufacturer. 



When Total Percent Sulphur is 26, Beaume Test is 33. 

 When Total Percent Sulphur is 25, Beaume Test is 32. 

 When Total Percent Sulphur is 24, Beaume Test is 31. 

 When Total Percent Sulphur is 23, Beaume Test is 30. 

 When Total Percent Sulphur is 22, Beaume Test is 29. 

 When Total Percent Sulphur is 21, .Beaume Test is 28. 

 A Beaume hydrometer may be purchased from dealers in druggists' 

 supplies. 



SELP-BOILED LIME-SULPHUR MIXTURE. 



This material is used particularly for summer sprays on tender 

 foliage fruits such as peaches and Japanese plums. The formula is : 



Lump lime 8 pounds 



Sulphur 8 pounds 



Water 50 gallons 



The mixture can be prepared better by using 32 pounds of lime, 32 

 pounds of sulphur, and 8 or 10 gallons of water, and then diluting to 

 200 gallons. 



Place the lime in a barrel and add enough water to almost cover it. 

 As soon as vigorous slaking develops, sift in the sulphur stirring vigor- 

 ously, or better still, add the sulphur which has previously been sifted 

 and mixed with water into, a thick paste, by adding slight amounts and 

 stirring vigorously. Stir constantly and add enough water to make 

 a thick paste and then, gradually, a thin paste. As soon as the slaking 

 of the lime has vigorously boiled the sulphur for about five minutes, 

 cold water should be added to cool the mixture and prevent further 

 cooking. It is then ready to be strained into the spray tank, diluted 

 up to the full formula and used. 



Care must be taken not to allow the boiling to proceed too far, — 

 if the mixture remains hot for fifteen or twenty minutes after the slak- 

 ing is completed, too much sulphur will go into solution and injury 

 to the foliage may result. 



The time of adding the cold water to stop the boiling depends upon 

 the lime. With a sluggish lime all the heat in it may be needed, while 

 with the limes that become intensely hot, care must be taken not to 

 allow the boiling to proceed too far. 



BORDEAUX- MIXTURE. 



Bordeaux-mixture is made of copper-sulphate, lime and water. 

 These three substances are combined in various proportions, depend- 



