1916 ENTOMOLOGICAL SOCIETY. 177 



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Mr. Fetch : I would like to say from our experience in Quebec, although small, 

 that the use of these various spray mixtures ought to depend upon the insects 

 which we have to control. For instance, we know that ordinary lime sulphur will 

 largely control the Tent Caterpillar if sprayed at the proper time, and when we 

 used a soluble sulphur we had absolutely no results at all in controlling the Tent 

 Caterpillar. Furthermore, this year I have used arsenite of lime, one quart to 

 forty gallons, and there has been absolutely no injury to the foliage. It was com- 

 bined with Bordeaux mixture. 



Mr. Sanders: The arsenite of lime we used burned the foliage very badly in 

 almost every case. 



Prof. Caesar: As for Soluble Sulphur, I may say we tested this mixture on 

 old, badly infested apple orchards two years ago in the Niagara district and agadn 

 this year, and found it gave very good satisfaction against San Jose Scale, just as 

 good as lime sulphur or Scalecide. We have not tested Barium sulpliide because 

 the company could not supply us with it. We have also obtained good results from 

 soluble sulphur as a summer spray, hut found it, when used with arsenate of lead, 

 more inclined to burn than the lime sulphur. 



Arsenite of lime with lime sulphur is a decidedly dangerous spray to use. I 

 have burned nearly every leaf off trees with it, but there are some people who still 

 use it and get very little burning. When used with Bordeaux mixture it is usually 

 safe. It is particularly good for spraying potatoes used along with Bordeaux. 



The matter of injury from sprays to apple foliage depends to a great extent 

 upon moisture condition. If the spray, particularly lime sulphur, dries quickly after 

 being applied there is usually no burning, but if it remains in a liquid state on 

 the leaves for some considerable time due to fog or rain, it may do a good deal of 

 burning. I i 



Mr. Sanders: I think that has been the experience all over the country this 

 year; it has become a question of moisture. 



Mr. Winn : I will ask Dr. Hewitt to make a few remarks about the smoker. 

 Prof. Lochhead : Before adjourning, I have much pleasure in rising to move 

 a vote of thanks to our retiring President. I have observed him for the last three 

 years, and during that time Dr. Hewitt has presided over our deliberations and 

 carried the meetings through to a most successful conclusion. For the lasb two 

 years he has been President by right of choice and he has brought the society to a 

 most flourishing condition. Last year we had a most enjoyable meeting in Toronto, 

 and this year it has been still better. I think all will agree that our proceedings 

 have been most excellent. I would like also to include in my motion the thanks of 

 the society to our visitors. We are very much indebted to Professor Fernald and 

 Mr. Burgess for coming up to Canada, and we are also extremely pleased to have 

 Mr. Lounsbury, of South Africa, with us. They are all distinguished Wsitors. 

 and they have been helping us out wonderfully. I know that the society will show 

 their appreciation in a fitting manner. 



Prof. Caesar : There is not one of us here but endorses what Professor Loch- 

 head has just said. Dr. Hewitt has certainly done wonders for the Society the 

 last few years. Of course, behind Dr. Hewitt has been Mr. Gibson and the other 

 members at Ottawa. It is really a great pleasure and a great source of benefit 

 to be able in the discussions we have had to call upon those who have come from 

 outside, and we have had a broader view of entomology and a greater amount of 

 benefit from the presence of these men. 



