70 THE CONNECTICUT POMOLOGICAL SOCIETY. 



it. Four per cent, is a high percentage, and our state law 

 says 3^ per cent, and I wouldn't dare risk arsenic at four 

 per cent. 



A Member : Could you use a weak mixture of these soluble 

 oils during the mid season with any effect on the young scale 

 without any injury to the tree? 



Prof. Slingerland: Not many experiments have been 

 made with the oils in the summer time ; they cannot be used as 

 strong in the summer as they can in the winter. We tried them 

 in the fall, when the leaves were mature, and they didn't burn 

 the leaves much, one to fifteen, but whether they can be used in 

 summer is something we have not learned yet. They are a 

 promising thing, and they are something we ought to know 

 more about, and we are going to know a whole lot more in 

 the coming year. 



A Member: What would you advise on large apple trees, 

 the oil or lime and sulphur? 



Prof. Slingerland: I said a moment ago I wouldn't rec- 

 ommend the oil on a large scale. I believe in it, and I think it 

 is a promising thing, but I am not going to tell you to buy it 

 in preference to the lime and sulphur, because we know what 

 the lime and sulphur can do. 



A Member: Would it be easier to put on the oil than the 

 lime and sulphur? 



Prof. Slingerland: Surely it would be easier to put on, 

 but next spring if your trees were dead, you wouldn't like it. I 

 simply say, try them. I am not recommending them for gen- 

 eral use. 



A Member : What is your opinion as to the eft'ectiveness of 

 the lime and sulphur solution in case it rains the same day? 



Prof. Slingerland: You give it a few hours to dry. and it 

 is all right. If you put it on in the morning, and it don't 

 rain until the afternoon, it is all right, but if it rains very 

 soon after, I should want to do it over again, pretty soon. 



President Eddy : I fear we shall have to draw the discus- 

 sion to a close now, for we have one more speaker that we 

 all want to hear, and that is our friend, Mr. William H. Skill- 

 man of New Jersey. His talk will be right along the same 

 lines we have been discussing. 



