INSECTICIDES 47 



The usual formula is, unslaked stone lime, 20 pounds; flowers 

 (or flour) of sulfur, 15 pounds, water to make 50 gallons. Stir 

 up enough water with the sulfur to make a thick paste. Slake 

 the lime in the vessel in which it is to be cooked with a small 

 quantity of hot water. Then add the sulfur paste to the slaking 

 lime. Add 10 or 15 gallons of water and boil for forty-five min- 

 utes. The mixture may then be diluted to make a barrel of 45 or 

 50 gallons, straining it carefully into the spray barrel or tank. A 

 large iron kettle or hog-scalder may be used for boiling the wash, 

 or where steam can be made available a steam pipe may be run 

 into several barrels and the wash boiled in them. Such 

 barrels may well be placed upon a platform so that the wash 

 may be drawn from them directly into the spray-tank. The 

 materials for making the wash will cost 1J to Ij cents per gallon 

 and the labor practically as much more. The leading manufac- 

 turers and dealers in insecticides are now selling concentrated 

 lime-sulfur solution which is all ready for use by merely diluting 

 to the desired strength, at a rate 'which will make the solution 

 to be used cost from 2J to 3 cents per gallon, nearly as cheap 

 as it can be made at home and with the saving of time and a dis- 

 agreeable job. In some communities a central plant makes the 

 wash and can sell it with a fair profit at a low rate. 



7. Home-made Concentrated Litne-sulfur. During the last few 

 seasons many large growers have been making their own con- 

 centrated lime-sulfur solution, and where the quantity to be 

 used warrants, a considerable saving may be effected. The New 

 York Agricultural Experiment Station has made very careful 

 studies* of the best methods of making and diluting the mixture 

 from which the following is quoted : 



GENEVA STATION FORMULA FOR CONCENTRATED LIME-SULFUR SOLUTION. 



fPure CaO 36 Ibs. 



Lime { If 95 per cent pure 38 Ibs. 



[If 90 per cent pure 40 Ibs. 



Sulfur, high grade, finely divided 80 Ibs. 



Water 50 gals 



*Bulletins 329 and 330 N. Y. (Geneva) Agricultural Experiment Station 



