144 



Do you make it 4 degrees to 41/2 degrees? 



PROF. FARLEY: For scale, we use material having 

 specific gravity of 1.03, 



SECRETARY BROWN: And get results at that? 



PROF. FARLEY : Yes, for both scale and leaf curl. 



MR. MARGESON: I think that the aphis is one of the 

 greatest pests that confronts the grower this year. 



:\rR. STOCKWELL: I Avould like to ask the Professor 

 why one couldn't spray for the scale and spray just before 

 the buds open, and put in a sufficient amount of Black-Leaf- 

 40 and kill the aphis at the same time? 



PROF. FARLP^'Y: I cannot answer that question so far 

 as the aphis is concerned, but we have sprayed with con- 

 centrated lime-siilfur at scale strength on varieties that are 

 very much subject to scab, just before the leaves appear, 

 and found that it will help control the scab and also control 

 the scale. I see no reason why you could not include Black 

 Leaf-40 in that application. We include it in the application 

 of dilute concentrated lime-sulfur just before the blossoms 

 open or just as they are showing the pink color. There is 

 nthing injurious in the Black-Leaf -40. so far as Ave have 

 feeen able to find out, nothing caustic in it. It is more cost 

 than caustic. 



MR. STOCKWELL: I understand that to successfully 

 eompete with the aphis we must Spray just before the buds 

 open, Black-Leaf-40 or something of that nature; is that 

 correct ? 



PROF. FARLEY: Yes. We find also he addition of 

 Black-L('af-40 after the petals have fallen will sometimes 

 help, but the period just before they open is the important 

 time. 



QIIESTTOX: If you spray just before the buds open, 

 with a solution of 1 to 9 concentrated lime-sulfur, Avouldn't 

 that injure the buds? 



PROF. FARLEY: Just before the leaf buds open? 



QUESTION. Well, put it either way, leaf buds or 

 blossom buds. I understood the gentleman to say he 



