UNITED STATES DEPARTMENT OF AGRICULTURE 



DEPARTMENT BULLETIN No. 1201 



Washington, D. C. V March 19, 1924 



PLANTS TESTED FOR OR REPORTED TO POSSESS 

 INSECTICIDAL PROPERTIES 



By 



N. E. McINDOO, Insect Physiologist, Fruit Insect Investigations, Bureau of Entomology, 



and A. F. SIEVERS, Chemical Biologist, Office of Drug, Poisonous, and Oil 



Plant Investigations, Bureau of Plant Industry 



CONTENTS 



Page 



Economic Aspects of Plant Insecticides 1 



Methods Used by the Writers in Preparing Plants for Insecticides 2 



Insects Employed and Methods of Testing Preparations against Them 3 



Results Obtained by the Writers 5 



Catalogue of Plants Tested for or Reported to Possess Insecticidal Properties 24 



General Summary S3 



Conclusions 54 



Literature Cited 54 



Index of Bolaiical and Common Names of Plants Catalogued 59 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1924 



