SEVENTEENTH ANNUAL MEETING. 129 



Question Xo. 29: Can anyone give definite information 

 of injury to trees by the use of "Scalecide"? 



Dr. W. E. Britton : The only case of injury to a large 

 apple tree was where the material was applied without first 

 shaking or properly mixing the contents of the original pack- 

 age. That might happen in the use of any miscible oils. The 

 injury consisted of killing the buds, the application was made 

 in the winter. Certain portions of the tree did not put out the 

 leaves until the leaves on other branches were nearly full 

 grown. On investigation I found the mixture had been taken 

 out of the barrel before mixing properly. On all packages are 

 recommendations that the contents be well mixed and shaken 

 before using. If this is done I don't believe you will get any 

 injury. 



Question No. 26; Is fumigation of nursery stock effec- 

 tive in killing the scale insect? 



Mr. Hopkins: I am not positive about it. We believe 

 when it is properly done it will kill them all right. The Ca- 

 nadian Government depends on that entirely ; they require that 

 all trees shipped into Canada shall be fumigated. 



Prof. Hedrick : At the instigation of nursery men in 

 Geneva, Professor Parrot began experiments in this work, al- 

 so with dipping nursery stock ; he has been trying not only 

 Scalecide, but half a dozen other mixtures. I know in a gen- 

 eral way, while he has had injuries result from dipping the 

 roots or tops in either the lime and sulphur solution or misci- 

 ble oils, he thinks fumigation is safer and better, but I cannot 

 give you the percentage of the injuries. If you will send a 

 card to the Geneva Station you will receive the result of these 

 experiments. They will be published later on. I am not an 

 entomologist and am speaking from information given me in 

 this matter. 



Mr. B. G. Pratt: Will the Professor allow me to make 

 this statement? I think he is mistaken when he states that 

 Professor Parrot said it was injurious to fruit trees to dip 

 them, root and top, in Scalecide or miscible oils. What he 

 did say was that while it did not clean the trees of the scale, 

 as the fumigating of stock did. that there was absolutely no 



