CONTENTS 



Page. 



The orange thrips: A report of progi-oss for the years 1909 and 1910 



P. R. Jones and J. R. Ilorton. . 1 



Introduction 1 



Original home and distribution 2 



Food plants - - 2 



Character and extent of injury 3 



Description and life history 4 



The adult 4 



The egg 5 



The larva 5 



The pupa 5 



Seasonal history 6 



Interrelation of abundance of thrips and food plants • 7 



Life cycle 8 



Habits 9 



Experiments with methods of control 9 



Cultivation 9 



Fumigation ■ 10 



Spraying •. 10 



Experiments to determine killing effect of different sprays 10 



Experiments to prevent marking of the fruit 10 



Experiments with nursery trees - 12 



Spray injury 13 



Recommendations 13 



Time of application 13 



Spray dilutions. ; 13 



How to spray 14 



Summary 15 



The red-banded thrips {Heliothrips rubrocinctus Giard) E. M. Russell. . 17 



Introduction 17 



History 17 



Recent records 19 



Nature and extent of injur>' 19 



Origin and distribution 20 



Classification 21 



Description 21 



The adult 21 



The egg 21 



The first-stage larva 21 



The second-stage or mature larva 22 



The young nymph or prepupa 22 



The full-grown nymph or pupa 23 



Habits of the adult 23 



Hatching of the egg 24 



Habits of the larva 24 



Habits of the prepupa and pupa 25 



Food plants 25 



Life cycle. 25 



Natural control 28 



Artificial control 28 



Bibliography 28 



Index 31 



