PRINCIPLES OF SPRAYING 



five pounds each of bluestone and lime in fifty 

 gallons of water, but the former is usually 

 sufficient. 



Lime-Sulphur. — The more important 

 fungicides, the commercial lime sulphur and the 

 self-boiled lime-sulphur, are practically super- 

 seding Bordeaux as a fungicide, not because 

 they are necessarily better, but because there is 

 frequently much burning of the foliage and 

 russeting of the fruit from the use of the Bor- 

 deaux. This is unfortunate as the latter is a 

 rather more effective fungicide as well as more 

 convenient and pleasant to use. The self-boiled 

 lime sulphur is a combination of lime and sul- 

 phur which is boiled by the heat of the slaking 

 lime alone, and makes a pretty good substitute 

 for the Bordeaux when it injures foliage or 

 fruit. This preparation of lime and sulphur 

 differs from the commercial form used as a 

 winter wash in that it is wholly a mechanical 

 mixture and not partly chemical like the latter. 

 It may therefore be used on the foliage in sum- 

 mer at a greater strength, there being only a 

 very small percentage of sulphur in solution 

 when the mixture is properly made. 



Equal amounts of lime and sulphur are used, 

 these being from eight to ten pounds each to 

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