1917 



ENTOMOLOGICAL SOCIETY. 



127 



of borer work. The kerosene emulsion had no" appreciable effect, nor did it injure 

 the trees, though it was applied in large quantities. The treatments applied and 

 results obtained may be quickly ascertained by consulting Table II. Kerosene 

 emulsion applied puro in the fall seems to have had some effect, but one cannot 



Effects of borers on nursery stock. The tree in the centre is uninjured, and one 

 year younger than the other two. Note the comparative size and beauty of 



uninjured tree., 



safely draw conclusions. Thirty per cent, infestation is high, though the average 

 number of larvsc per tree is a minimum. The carbolineum applied pure and its 

 emulsion gave almost absolute control and seems to me a very simple and effective 

 means of control under nursery conditions. 



