132 STATE HORTICULTURAL SOCIETY. 



Answer: We had a bad summer this year, and indeed for three years 

 back, that may account for the trouble you had. 



Question: Then I should spray for them more often during bad 

 weather? 



Answer: Yes, as a sort of insurance — but that is something you 

 should settle for yourself. 



Question : Do you use nicotine solution for the Avooley aphis on nurs- 

 ery stock? 



Answer: I would rather use a miscible oil — and I would use soap 

 with the nicotine if I did not use oil. 



Question : Is there any danger — or rather do these parasites multi- 

 ply rapidly enough to keep up with the aphis? 



Answer: They will go ahead of the ai)his with proper weather condi- 

 tions. 



Question : Can we control this aphis by thorough spraying with lime- 

 sulphur, strong, when it is in the egg form? 



Answer: Not completely — you can to some extent. 



Question: Have there been any experiments conducted whereby any- 

 one can be assured that he can control the aphis by spraying thoroughly 

 with Black-leaf 40? 



Answer: Lots of people have done it. 



Question: Have they done it and known it? 



Question : I know of one who tried it for three years and declared 

 it was a success, this year Avith him. it was a failure. AVith me, I had 

 the aphis bad last year, but this year it was not half as troublesome 

 as it was last year. 



Answer: Of course these experiences will differ, and there may ha 

 other reasons for the difference than the one's that appear at first 

 thought. 



Question : What effect does the spray have upon the canibal para- 

 sites? 



Answer.: Some of the parasites may be killed. 



Question: Is not that one our difficulties — a reason why we have not 

 been able to control it some seasons and other seasons we could? 



Answer: I do not think so. 



Q. What is a good book on injurious insects? 



Answer: One written by Slingerland & Crosb3% and published by 

 McMillen. It is the finest and most complete book in the English 

 language. I would recommend every fruit grower to have that book. 



A Member: I do not like to keep asking questions, for it costs money 

 to have this meeting, but I would like to know before going away from 

 here, whether it pays to use Black-leaf 40 at any time during the sea- 

 son; whether our Experimental Stations at Lansing or elsewhere Jiave 

 conducted any experiments whereby Ihey can say to any fruit grower 

 that he can afford to spend this money to save dollars in apples. As 

 it is, the State of Michigan is spending a lot of good money to save 

 dollars in apples, and we want to know whether there is any reliable 

 information as to whether it really pays — that is what we are after. 



Answer: I will say yes, it pays. 



A member: I would like to give my experience. There is a gentle- 



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