88 Report of State Board of Horticulture. 



REMEDIES. 



There is but one remedy yet discovered which need be con- 

 sidered in this State. That is the lime, sulphur, salt spray. 

 In the East, fairly satisfactory results have been obtained by 

 the use of various preparations of kerosene or other petrol- 

 eum products, but the high price of kerosene makes it im- 

 practicable to use it here in any form for spraying purposes 

 except in a very small way. The San Jose scale has probably 

 been present in this State approximately twenty-five years; 

 and for the past fifteen years the lime, sulphur, salt has been 

 the standard spray for destroying it. During the first few 

 years of its use various formulas were employed and to a 

 less extent this is still true, but since December, 1896, when 

 it was first published in the Biennial Report of the State 

 Board of Horticulture, the formula which has come to be 

 known as the Oregon formula has been the standard in 

 this State. 



THE OREGON FORMULA. 



This formula was the result of some extensive experiments 

 by the late Emile Schanno, of The Dalles, Oregon, and is as 

 follows : 



Quicklime 50 pounds 



Sulphur 50 pounds 



'■■'Salt 50 pounds 



Water 150 gallons 



This may be much simplified by designating it as the 

 1-1-1-3 formula, i. e., 1 pound of lime, 1 pound of sulphur, 

 and 1 pound of salt to each 3 gallons of water. West of the 

 Cascades this formula is more eflicient than the 1-1-1-4 

 formula which is reported to be satisfactory in the Inland 

 Empire. 



In preparing this spray it is my plan to put a little water 

 in the bottom of the boiling vat, start the fire, and when the 

 water comes' to a boil pour in the required amount of lime 

 and sulphur. The hot water, together with the heat gener- 

 ated by the slaking lime, will at once set the mass to boiling 



*Salt may be omitted without loss of efficiency. 



