196 SPRAYING MATERIALS 



in dormant condition, 1.03. For apple and pear scab and similar 

 diseases, summer spray, 1.01. For peach scab and brown rot, 

 summer spray, 1.005. 



3. The Home-foiled Lime-sulfur Wash. This was the original 

 home-prepared lime-sulfur spray material and was at one time 

 used very extensively. But the two forms already discussed 

 have largely driven it out of use. It is still used by many 

 growers who consider it the only really satisfactory form. The 

 great objection to it is that only a small quantity can be pre- 

 pared at a time, usually a single cask, and that, too, only as it is 

 wanted for use, being applied hot, as a rule. 



The formulas used vary greatly in both ingredients and run 

 all the way from 



15 pounds lime, 15 pounds sulfur, 50 gallons water 

 to 22 pounds lime, 20 pounds sulfur, 50 gallons water. 



The process of making is as follows: Put the lime and 

 sulfur into a large kettle with about 20 gallons of water and 

 boil for one hour. Then add enough water to make 50 gallons, 

 strain into the spray cask and apply at once. Authorities differ 

 as to the objection of allowing this mixture to cool ; for example, 

 to stand over night. Frequently it is very convenient to prepare 

 the night before what is to be put on the first thing in the morn- 

 ing, and enough success attends this plan so that we need not 

 hesitate to do it. 



4. The "self -boiled" lime-sulfur is that in which the heat 

 of the slacking lime is relied upon to cook the mixture. It is a 

 very mild form, being little more than a mechanical mixture of 

 sulfur and slacked lime, and is useful only as a summer fungicide. 

 But for that purpose, particularly for use against the brown 

 rot of stone fruits, it is very efficient. 



The usual formula is as follows: 



8 pounds sulfur, 

 8 pounds rock lime, 

 50 gallons water. 



An old oil cask is a good receptacle in which to prepare it. 

 The lime is placed in the bottom of the cask, and it is imperative 



