FORTY-FOURTH ANNUAL REPORT. 141 



Q. What soap would you recommend to combine with the Bordeaux 

 mixture ? 



A. Soft soap, fish soap or whale oil soap. 



Q. Is the Bordeaux Mixture just as effective in its results if prepared 

 from stock solutions of lime and copper sulphate as when freshly made? 



A. Some think not. I usuall}' slack about forty pounds of vitriol, 

 two pounds to a gallon of water. I had a Frenchman working for me 

 last spring and he said that in France they slacked their lime at each 

 tank full. The results seemed to be much better. 



Q. Is it just as good when carried in stock for twenty-four hours? 



A. We have never had any question but that it was all right if held 

 over for only a few houis. Of course, the mixture should be thoroughly 

 stirred before using after it has been standing in the tank. 



Q. I have l)een mixing mine by putting four jiounds of lime in one 

 barrel and four pounds of vitriol in another barrel, filling up the two 

 barrels and running the two together in the tank. Is that all right? 



A. Yes, that is decidedly the best way. 



Q. Do you ever strain the lime? 



A. Yes, it should always be strained. There are always some impuri- 

 ties and when you strain it you take out a lot of grit that Avill otherwise 

 get into your spraying outfit. I have never seen fit to recommend it very 

 much but I found about five years ago that if you let tlie two materials 

 go through the strainer before mixing, it makes a better mixture and 

 you won't have any trouble with your screen clogging uj). The lime 

 [lowder purchased in sacks, you will have to calculate on using fifty per 

 cent more than with the stone lime. 



Q. Does connnercial l^ime-Sulphur deteriorate? 



A. If it is left uncovered or freezes, it deteriorates perhaps ten per 

 cent. 



Q. If left uncovered, wouldn't that account for tlie deterioration? 



A. It might. 



Q. Did you ever test a barrel that had been frozen?, 



A. No, I never did. 



Q. Does it freeze easily? 



A. It will not freeze until about five degrees above zero. 



Q. What is the effect on Lime-sulphur if it does freeze? 



A. The strength is decreased about 10 per cent. 



Q. Would von recommend using Lime-sulphur every time you spray? 



A. Yes. 



Q. If you leave Lime-sulphur in the tank after the arsenate of lead 

 has been added, does that si)oil the solution? 



A. I will answer that <piestion in this way. If you have any mixed 

 at night when you get tlirough, unless you are very sure you can get at 

 it the first thing in the morning, I would open the tank and let it run 

 out and mix fresh in the morning because you are going to have some 

 calQium arsenite when the lime is combined with tlie arsenic and this 

 may burn your foliage. 



Q. When does lime-sulphur take the place of the Bordeaux mixture? 

 ' A. It will on a]j])les, European plums and sweet and sour cherries. 



Q. What strength would you use for summer s]H-aying for peaches? 



A. A very weak solution. It is apt to burn the foliage. We have 



