110 



ot solution to eoMtrol San Jose scale. You can use lime- 

 sulphur at various strengths and yet get very satisfactory 

 results in controlling that pest. AVe figure that about 27 

 to 28 pounds of soluble sulphur to 50 gallons of water gives- 

 you about the same amount of efficient sulphur as 5^/2 gal- 

 lons of lime-sulphur solution. Now then, as regards the 

 testing of lime-sulphur solution, I do not know of any test 

 other than that one of using proper amounts of sulphur and 

 lime according to approved formulas or to employ com- 

 mercial concentrates of guaranteed densities. You may 

 have some other tests in mind that I know nothing about. 



THE CHAIRMAN: Aren't you pretty safe if you buy 

 from reputal)le dealers, on the Beaume test? 



PROP. PARROTT : Yes, in New York we find as the 

 result of our inspection of fungicides and insecticides, that 

 cur commercial solutions are very even in their strength. 

 I'hey are conforming to the standard of about 32 to 34 

 degrees Beaume, and the amount of sulphur in them ranges 

 in the neighborhood of 130 to 135 pounds. In New York 

 we no longer test the commercial concentrates. 



MR. JENCKS: Would you recommend making your 

 concentrated lime-sulphur at home? There has been a 

 {■•■light movement in that direction in ^Massachusetts. 



PROF. PARROTT : Well, I would say as far as the 

 Experiment Station is concerned, we make our own concen- 

 trate. Quite a number of fruit growers are doing the same 

 thing. Five or six years ago there was more of a tendency 

 on the part of the fruit growers to make their own lime- 

 sulphur solution, but in recent years, owing to the low price 

 of the commercial product, I think fewer orchardists, com- 

 paratively speaking, are making their own preparations. 



MR. JENKS : Can you make as good a solution and is 

 there a saving? 



PROF. PARROTT : I do not think there is a great sav- 

 ing by making your own preparations. Our reason for mak- 

 ing our own preparation at the experiment station is that we 

 iiave the equipment and do make a satisfactory product, at 



