VI DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



with the detailed life history of this insect in an important fruit 

 region. Similar studies are under way or planned covering the prin- 

 cipal fruit sections of the United States. A report will shortly be 

 prepared dealing with the codling moth in Michigan. 



During the past few years there has been considerable interest 

 aroused, following the experience of certain western entomologists 

 and orchardists, in the practicability of controlling the codling moth 

 by a single thorough application immediately after the falling of the 

 petals. This so-called one-spray method has been compared with 

 the usual spraying schedule in vogue in the East by numerous east- 

 ern entomologists, and the results of the investigations of this 

 bureau on the relative merits of these two spraying methods in the 

 control of the codling moth and also in the control of the plum 

 curculio are detailed in Part VII. 



The final paper, Part VIII, reports on tests of sprays against 

 the European fruit Lecanium and the European pear scale, two 

 serious scale-insect enemies of deciduous fruits in California. 



A. L. QUAINTANCE, 



In Charge of Deciduous Fruit Insect Investigations, 



