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UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 1027 



Contribution from the Bureau of Ciiemistry 

 W. G. CAMPBELL, Acting Chief 



Washington, D. C. 



April 17, 1922 



POISONOUS METALS ON SPRAYED 

 FRUITS AND VEGETABLES 



BY 



W. D. LYNCH, Assistant Chemist, C. C. McDONNELL, Chief, Insecticide 

 and Fungicide Laboratory, and J. K. HAYWOOD, Chief, Miscellaneous 

 Division, Bureau of Chemistry; A. L. QUAINTANCE, Entomologist in 

 Charge, Fruit Investigations, Bureau of Entomology; and M. B. WAITE, 

 Pathologist in Charge, Fruit-Disease Investigations, Bureau of Plant 

 Industry 



CONTENTS 



Page 



Purpose of Inyestigatlon 1 



Results of Previous Investigations 1 



Experimental Work ..16 



Results of Experimental Work 18 



Summary 68 



Literature Cited 68 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1922 



