90 THE COXXECTICUT POMOLOGICAL SOCIETY. 



Prof. Brittox : I thought it would wash off. I will say, 

 however, I am going to use it more extensively the coming 

 spring. 



]\Ir. Stoxe : \\h\ not add that to your lime and sulphur? 

 What w'ould be the objection, except cost? 



Prof. Brittox : I don't see any. We have only tried it with- 

 out boiling ; we have not put it into the boiled mixture. 



Question : Will you try it before next year ? 



Prof. Brittox : Yes. 



Question: Will caustic soda injure rubber hose? 



Prof. Brittox : I think it will after a time. 



Question : Would you put in the soda before boiling? 



Prof. Brittox' : I should try it both ways. One point, how- 

 ever, is worth mentioning. I don't believe that caustic soda and 

 lime would be worth much as a fungicide, while the lime, sul- 

 phur and salt mixture has considerable value. 



Mr. Stoxe : Why not kill the scale with caustic soda and the 

 fungi with Bordeaux mixture. 



, Prof. Brittox : If we can do both with the same mixture 

 at a single operation we shall save considerable expense. 



Mr. Stone : Why not add caustic soda to Bordeaux mixture 

 for this purpose? 



Prof. Brttton : \\'e can perhaps try adding it to the Bor- 

 deaux mixture. We are hunting for the advantages and dis- 

 advantages in all these things. If we can get a good insecticide 

 which is also a good fungicide, we should use that on general 

 principles. In oiir spraying with caustic soda, we got something 

 like 12 per cent, of living insects that came through the treat- 

 ment. That does not mean very much. It shows that it will 

 kill some of them, and its eft'ectiveness perhaps would depend 

 somewhat upon the weather and whether it washed off or stayed 

 on for a long time. 



Question : Will caustic soda kill the insects inside of an hour 

 or so? 



Prof. Brittox' : It will, perhaps, where it comes in contact 

 with the insect : but where you have several layers over the bark 

 it may be some time before it gets down to the bark. 



A Member : I can mention the case of ]Mr. Keller in Dela- 

 ware. He uses simply the Bordeaux mixture. 



Prof. Brittox : Wt made a few trials of copper sulphate 

 with the lime, sulphur and salt. In one case it did not stick 



