CONTENTS, 



Tntroduotion "> 



History H 



Nature and extent of injury <i 



Origin and distribution 7 



Deseri[)tion S 



The adult S 



The egg : !» 



The larva !• 



The young nyniph or prepupa ^-- 10 



The full-grown nymph or pupa 111 



Habits 10 



Feeding 10 



Junii)ing 11 



Flight . 11 



Food phints 1 ' 



Life history : ^ 1 



Methods of study 11 



Life cycle 1i' 



Hibernation 12 



Other thrips that may be mistaken for the tobacco thrips 12 



Natural control 1"> 



Rains i;i 



Insects 14 



Remedies 14 



Cultural methods.- : 14 



Insecticides 17 



The best treatment 1_ i;> 



How to make kerosene emulsion l'.» 



When to apply the emulsion . l'.» 



How to use the emulsion 2(» 



Cost of spraying 1 20 



Sui)plies and labor , 2<i 



Apparatus 21 



Sunmiary of reconnnendations 21 



Caution 21 



Addenda 22 



The tobacco thrips in lOOn-O 22 



Effect of the spray 22 



Index 2". 



