138 



would ))e all right, but you people use so much arsenate of 

 lead that it would be different. I have been up against the 

 aphis this last year, and what I am interested in here is to 

 find the best and easiest way to control that aphis. I know 

 of several old orchards that are practically lost because of 

 the aphis. 



QUESTION: How about adding more lime to the arse- 

 nate of lead before putting it in, so as to take up the free 

 arsenic? Does that do any good? 



THE PRESIDENT: Mr. Mann, have you tried adding 

 extra lime? 



MR. MANN: I don't want anything to do with that 

 mixture. 



PROF. FARLEY: I would like to ask if any one has 

 tried adding a little lime to the lime-sulfur-arsenate of lead 

 combination. (No response.) We have not tried it, but it 

 has been tried in Delaware. I do not know about the ex- 

 perience of the growers here, but generally speaking our re- 

 Fults have been more satisfactory, so far as burning was 

 concerned, with the home-made lime-sulfur mixture thatt 

 with the commercial mixtures. It seems to me that this may 

 be due to the fact that there is a larger excess of lime in the 

 home-made lime-sulfur mixture than in the commercial. 



THE PRESIDENT : Mr. Wheeler, can you give us any 

 help on this question ? 



MR. WILFRID WHEELER: I don't think so. I have 

 not used it. 



THE PRESIDENT: Can you, Mr. Frost? 



]\IR. FROST : I feel about that as ]\Ir. MaiMi does with 

 the sulfur compound, where we are using arsenate of lead 

 as strong as we have to with gypsy moth. I know that sul- 

 fur has a great tendency to break up the arsenate of lead, 

 and I have practically given up the combination of sulfur 

 £nd arsenate of lead in all cases. I also think that the cli- 

 matic conditions make a great difference, and the brand of 

 the arsenate. Some of it breaks up easier than others. I 

 don't think we consider climatic conditions as much as w& 



