TWIiXTIIiTII .WXUAL MEETIXG. 71 



all together, the cnumry over, sliowed the home-boiled con- 

 centrate lime-sulphur ov commercial concentrates are the 

 ones that are successful for proper operating for apple scab. 

 The self-boiled is the spray for peaches. Dr. Clinton has 

 told you something about the use of commercial concentrates 

 for spraying peaches, and we have been doing some work for 

 two years on spraying peaches with diluted concentrates and 

 have got some fine results. As a practical matter, you want 

 to use the self-builed for summer spra_\ing of peaches, and 

 you can make it yourself. 



Mr. Frost : Did you get as good results from Ikmiic- 

 boiled concentrate as from the commercial? 



Prof, W'hktzel: We have from all our experiments — 

 I think the records show that properly made home-boiled 

 lime-sulphur is just exactly as good as any of the commercial 

 boiled, if it is properly made and properly diluted, and the 

 commercial is giving just as good results as the home-boiled 

 if it is properly made and properly diluted. They are one 

 and the same thing, practically, for they are made out of. 

 lime and sulphiu". 



Mr. Pratt: ^Ir. Chairman, I wish you would give the 

 strength of commercial lime and sulphur for this apple scab. 



Prof. Whetzel: We are going to use next year 1-40 

 of the concentrate 32 degree, or 33 degree test of the concen- 

 trate diluted, 1—10 plus 2 pounds of arsenate of lead, 



A [Member : I would like to ask how much lime and 

 how much sulphur you use to get 33 per cent of lime and . 

 sulphur. 



Prof. Whetzel: If }0U make your own home-boiled 

 vou won't get 33 per cent, you should dilute according to the 

 densitv of the concentrate which you get. See table for dilu- 

 tions in Cornell Pulletin 289. 



A Me^eber : How many pounds of sulphur and how 

 manv pounds of lime do you have to use to get that 33 de- 

 srrees ? 



