1 .? 



• Ml 



ijMIVF • IF 



}0. 



■ 



CONTENTS. 



Introduction, . . ... 



Systematic Position of Aleyrodes, 



Methods of Study, ...... 



The Greenhouse Aleyrodes. 



Description, ..... 



Notes on Life History and Habits, 



Identity of the Insect, .... 



Origin and Distribution, . 



Food Plants, ..... 



Economic Importance, . . . . 



Preventives, . : . . . 



Remedies, ...... 



Experiments with Contact Insecticides, 

 Experiments with Fumigants, 

 Discussion of Results, 

 Recommendations, . . . . 



Bibliography, ..... 



The Strawberry Aleyrodes. 



Description, ...... 



Notes on Life History and Influence of Weather, 

 Economic Importance, . . 



Treatment, ..... 



Preventives, . 



Remedies, ..... 



Bibliography, . . . . . 



Summary, ...... 



Explanation of Plates, . . . . 



5 

 7 

 9 



12 



28 



34 

 34 

 34 

 35 

 36 

 37 

 38 

 4i 

 47 

 49 

 52 



53 

 55 

 56 

 57 

 58 

 58 

 61 

 62 

 65 



