18 PROTECTION OF PLANTS, 1918-19 



REPORT OF THE DELEGATE TO THE ONTARIO ENTOMOLOGICAL 



SOCIETY 



Professor Firmin Letourneau, La Trappe, P.Q- 



On the 4th and 5th of December, Father Leopold and I attended the 55th 

 annual meeting of the Entomological Society of Ontario as delegates of the 

 Quebec Society for the Protection of Plants. 



The President of the Society, Professor Caesar, had obtained for the con- 

 vention the accommodation of the Ontario Agricultural College, where we were 

 greeted and entertained with a kindness which we shall always remember. 



Prominent entomologists of Eastern Canada and several from the United 

 States were present at the meetings. 



Early in the session, it was Father Leopold's privilege to open a discussion on 

 spraying in the orchards, which brought out the following points: 



It seems that in Nova Scotia, on account of the peculiar climate, Lime 

 Sulphur occasions a considerable drop of apples, while in Quebec and Ontario this 

 does not occur, and Lime Sulphur, it seems, is still going to be used extensively as 

 in the past. Professor Parrot of Geneva affirms that dropping does not occur in 

 New York either. 



Bordeaux mixture, since it causes russeting of fruit, should not be applied 

 after the petals of the apples have dropped, but may be safely applied before, for 

 the first semi-dormant spray or for any spray before the calyx spray. 



Dusting so far has been successful, whenever applied with care, but it would 

 not be safe to recommend its use to replace the liquid spray until more is known 

 about this relatively new application. 



After this discussion, Messrs. W. A. Ross and L. Caesar, gave us an excellent 

 paper on the principal insects of last season in Ontario: Cherry Flies, the Pear 

 Psylla, the Raspberry Miner and the Strawberry curculio, etc. 



Dr. A. C. Baker, of the Washington Bureau of Entomology sent a paper on 

 Aphids, He find that they have a certain economic value, in the lact that the 

 Nut galls, of which China has made an industry, are their product. But they 

 certainly are the authors of much damage by attacking plant tissues and acting 

 as carriers of disease. 



Dr. Slater- Jackson of the Department of Zoology, McGill University, gave 



