CONTENTS. 



PAGE. 



Introduction 3 



CocciD^, OR Scale Insects 5 



The San Jose Scale 7 



Its Economic Importance 7 



Plants Affected 9 



Appearance of Infested Plants 9 



Life-history 10 



Descriptions 15 



How Disseminated • 19 



Present Distribution 20 



Remedies 21 



The Cherry Scale 24 



Food Plants 24 



Life-history 24 



Distribution 24 



Descriptions 24 



Remedies 25 



The Oyster-shell Bark-louse 25 



Distribution 25 



Food Plants 25 



Life-history 25 



Descriptions 26 



Remedies 26 



Recommendations to Horticulturists in Kansas 27 



Legislation 28 



California 28 



Colorado 31 



Kentucky 34 



Louisiana 37 



Michigan 38 



Maryland 41 



North Carolina .' . .' 44 



Ohio 48 



Oregon 52 



Pennsylvania 53 



Utah 56 



Virginia 57 



Washington 59 



