106 



gested that w^s a saeriligious use of maple syrui?, but it 

 seemed to be quite ei^ective. 



A MEMBER : I would like to kuow whether that can 

 hurt our bees? 



THE CHAIRMAN: We will call on Prof. Parrott to 

 answer that. 



PROF. PARROTT: You probably know that in New 

 York there are large plantings of the sour cherry and we 

 have two species of flies with similar life histories and 

 liabits, that attack cherries in much the same manner as the 

 fly is A'ery injurious to apples in the New England States. 

 It is a fact that a great deal of protection is derived by 

 applications of arsenate of lead and molasses in the case of 

 cherry orchards, and while I have made no study at all of 

 the apple maggot. I have never been able to understand why 

 if the treatment is of value against cherry maggots, it does 

 not exert some influence against the apple maggot. 



A MEMBER: T had supposed that that would control 

 that insect because I have 1)een for a great many years in- 

 terested in the control of the fruit fly, watching the litera- 

 ture and the results of the work carried on in South Africa, 

 and I know they have had very remarkable results with 

 that sweetened lead arsenate mixture, and I had supposed 

 we would get similar results with this similar species. 



PROF. PARROTT: I know Prof. O'Kane had not ob- 

 tained satisfactory results and that is the reason I handled 

 rhis question so cautiously. I have had no experience with 

 the apple species but there is no question at all that in the 

 case of sour cherries, much benefit is derived from the 

 sweetened spray. With regard to the honey bee. Prof. 

 Caesar of Ontario who developed the methods for protection 

 ol sour cherries states that he has noticed no ill effects of 

 such application on bees. 



A :\rE:\rBER: why do you use the arsenate of lead? 



PROF. PARROTT: The question is, in making that last 

 spraying, when the Inids are breaking, using lime-sulphur, 

 nicotine and arsenate of lead, whv vou use the arsenate of 



