SPRAYS AND OTHER MEANS OP CONTROL 



1865 



number of dilutions. Another example: 

 Supposing the decimal of the concen- 

 trate is known and this concentrate is 

 diluted by a certain number of volumes 

 of water, what is the decimal of the 

 spray? Let us take the figures in the 

 example above. The decimal of the con- 

 centrate is .288 and 13.4 volumes of 

 water are added to it. 13.4 plus 1 equals 

 the number of dilutions. .288 divided by 

 14.4 equals .020, which is the decimal of 

 the spray and corresponds to 3 degrees 

 reaume. 



Self-Boiled Lime-Sulplmr 



This is the standard summer spray for 

 peaches and other stone fruits to pre- 

 vent the fruit spot disease. Its use, how- 

 ever, is never necessary if proper fall 

 spraying with Bordeaux has been done. 

 This spray is much safer than dilute 

 lime-sulphur solutions, as it will not in- 

 jure foliage. It may be used to prevent 

 apple and pear scab where this disease 

 appears. It also has a beneficial effect in 

 a limited way in the control of scale. 

 Infestation of the fruit may be checked 

 by its use. 



Lime (unslaked) <S pounds 



Sulphur (flour or flowers) 8 pounds 



Water 50 gallons 



The lime should be placed in a barrel 



and enough water poured on to almost 



cover it. As soon as the lime begins to 



slake, the sulphur should be added after 



sifting it so as to break the lumps. The 



mixture should be stirred and more 



water added as needed to form a thick 



paste at first, and then gradually a thin 

 paste. The heat of the slaking lime will 

 cook the mixture, and from five to 15 

 minutes will be necessary, according to 

 the quickness of the lime. Be sure not 

 to let it overcook, as this would tend to 

 form compounds which would burn. As 

 soon as the sulphur and lime have 

 reached the paste state, fill up the barrel 

 to 50 gallons with cold water. Do not 

 use any hot water in making this mix- 

 ture. For large operations, proportion- 

 ate amounts of lime and sulphur should 

 be used, and it will be found that it is 

 easier to make large quantities than 

 small amounts. 



liime-Sulplmr 



(2) 



Fresh stone lime % pound 



Sulphur 1 pound 



Water % gallon 



Slake the lime in the cooker. Add the 

 sulphur and the water. Boil briskly till 

 the sulphur is dissolved (about 45 min- 

 utes), stirring continuously and keeping 

 the cooker covered. As it boils down 

 keep adding water. When finished let 

 settle. Use only the clear liquid, which 

 may be stored if kept from the air. Pre- 

 pared in this way lime-sulphur should 

 have a hydrometer reading of about 26 

 degrees, but little weaker than the fac- 

 tory-made product. Write for bulletin 

 on lime-sulphur — ^Popular Bulletin No. 

 2S, 



For use, any concentrated lime-sulphur 

 may be diluted according to the following 

 table : 



Hydrometer test of concentrate 



To make dilute spray 



Beaume Degrees 



Specific Gravity 



Beaume, S** sp. gr. 1.02 

 lb. sulphur in 5 gals. 

 Winter spray 



Beaume, 1.5" sp. gr. 1.01 



1 lb. sulphur in 10 gals. 



Simimer spray 



34 



1.302 

 1.279 

 1.259 

 1.236 

 1.215 

 1.196 

 1.158 

 1.122 



3 to 14 water 

 13 

 12 

 11 

 10 



9 



7 



6 



lto28 



32 



26 



30 



24 



28 



22 



26 



20 



24 



18 



20 



14 



16 



11 







W. S. C. formula lime-sulphur. 



