VIII DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Page. 



On the nut-feeding habits of the codling moth S. W. Foster. . 67 



Notice of walnut infestation 67 



Nature of injury 68 



Extent of infestation 68 



Varieties attacked 68 



Seasonal history of the codling moth on walnuts 68 



Control 70 



Life history of the codling moth in northwestern Pennsylvania. A. G. Hammar. . 71 



Seasonal-history studies of 1909 72 



Source of rearing material 72 



Overwintering larva? 72 



Spring brood of pupae 73 



Spring brood of moths 74 



The first generation 80 



The second generation 91 



Band records of 1909 % 95 



Review of the life-history work of 1909 98 



Seasonal-history studies of 1907 and 1908 98 



Source of rearing material 98 



Time of emergence of moths of the spring brood 100 



Time of emergence of moths of the first brood 100 



Band records of 1907 and 1908 102 



Weather records for 1907, 1908, and 1909 104 



Comparative life-history studies for the seasons of 1907, 1908, and 1909 108 



Insect enemies " 110 



Summary 7 110 



The one-spray method in the control of the codling moth and the plum curculio, 



A. L. Quaintance, E. L. Jenne, E. W. Scott, and R. W. Braucher 113 



Results of experiments with the one-spray method as compared with results 



from the usual schedule of applications 116 



Experiments in Arkansas 116 



Experiments in Virginia 130 



W. S. Ballard's orchard 130 



Orchard of Strathmore Orchard Co 134 



Experiments in Michigan 137 



Summary statement of results 145 



Conclusions , 146 



Tests of sprays against the European fruit Lecanium and the European pear 



scale P. R. Jones. . 147 



The European fruit Lecanium (Lecanium corni Bouche) 148 



Appearance of the insect 148 



Plan of work and method of ascertaining results 148 



Application of sprays 148 



Sprays used and methods of preparation 148 



Results 151 



The European pear scale (Epidiaspis pyricola Del Guer.) 151 



Appearance of the insect and extent of injury 151 



Spraying experiments in 1908 152 



Spraying experiments in 1909 155 



Cost of spraying 158 



Summary 159 



Index 161 



