VIII DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



The California peach, borer — Continued. 



Distribution and food plants — Continued. Page. 



History of fruit growing in the Santa Clara Valley 67 



Limits of areas in which injury occurs 67 



Varieties of cultivated fruits attacked; resistant budding and grafting 



stocks; soil conditions as bearing on infestation 68 



Descriptions, seasonal history, and habits 68 



The egg 68 



The larva 69 



The pupa 74 



The adult 77 



Natural enemies 83 



Methods of control 83 



Experiments with preventives 83 



"Worming" and applying washes in the Santa Clara Valley 85 



Formulas for washes used 86 



The carbon bisulphid treatment 87 



Methods used against the eastern peach borer 87 



Summary and recommendations 88 



Bibliography 88 



Notes on the peach and plum slug R. A. Cushman. . 91 



Introduction 91 



Observations on the peach and plum slug in 1910 92 



Life history 94 



The adult 94 



The egg 96 



The larva 96 



The prepupa 98 



The pupa 99 



Total developmental period 100 



Extent of damage 100 



Natural enemies 100 



Remedies 102 



The peach bud mite J.. L. Quaintance. . 103 



Introduction 103 



History 103 



Economic importance 106 



Habits and natural history . 110 



Systematic relationships and other economic species Ill 



Remedial considerations ~\ 113 



The grape scale James F. Zimmer. . 115 



Introduction 115 



Distribution and food plants 115 



Habits and natural history 116 



Description 117 



Parasites 118 



Preventives and remedies 120 



Lime-sulphur wash 120 



Self-boiled lime-sulphur wash , 120 



Other sprays 121 



When to spray 121 



Bibliography- 122 



Index 125 



