180 THE CANADIAN ENTOMOLOGIST. 



BOOK NOTICE. 



" The Codling Moth " : L. Csesar. Bulletin 187, Onlario Department 

 of Agriculture. 40 pp., .21 figs. (Toronto, Ont., Jan., 1911.) 



To say that this publication "fills a long felt want," if it has the 

 disadvantage of echoing the words of hurriedly written notices and reviews 

 of books, is only expressing our firm conviction. Every entomologist in 

 Eastern Canada, we say " eastern " advisedly, has realized the need of a 

 clearly written and practical bulletin on this insect, which is, of all insects 

 attacking the apple, the most universally destructive. It has remained, 

 however, for Mr. Caesar to endeavour to supply that need, and he is to be 

 congratulated on the successful manner in which he has accomplished his 

 task. He has added to the increasing list of valuable publications written 

 by members of the staff of the Ontario Agricultural College one which is 

 second to no other in its manner of treatment, simplicity of expression, so 

 important in these bulletins of an educational character, and in the 

 description of the practical methods of control. 



The account of the life-history of the moth, which succeeds the intro- 

 duction, contains many original observations. These, together with the 

 observations of other investigators, increase the utility of the bulletin to no 

 small extent, as so many accounts are mere compilations, and inapplicable 

 to local conditions, which must, of necessity, be studied. The author's 

 experience of orchard conditions in Ontario, and his intimate acquaintance 

 with the practical work of spraying, give the bulletin the impress of 

 authority and a markedly increased value. We are pleased to note his 

 insistance on thorough spraying. In view of the debated question as to 

 the efficacy of the single-spraying for controlling the Codling Moth, the 

 author's experience, in which this method resulted in an average of 90 

 per cent, worm-free fruit, is worthy of note. As we presume the author 

 is not responsible for the inversion of Figure 4, we will not criticize the 

 only one of twenty-one excellent illustrations to which reference might be 

 made. 



We hope that the free distribution of the bulletin by the Department 

 of Agriculture for Ontario will result in a marked increase in the practice 

 of judicious and thorough spraying, the beneficial effect of which will be 

 incalculable. C G. H. 



Mailed May 12th, 191 1. 



