Massachusetts 

 Agricultural Experiment Station 



BULLETIN No. 234 MARCH, 1927 



THE POISONING OF HONEY BEES 

 BY ORCHARD SPRAYS 



By A. L Bourne uassacIiuseKs Igkalhna/ Col 



AMHeasT, MASS. 



For many years the question of possible injury to honey bees from the 

 luse of poison sprays upon fruit trees has been the subject of discussion 

 and controversy. Recent studies made by the Experiment Station indicate 

 that there is little danger of killing honey bees by spraying orchards, even 

 when some bloom is present, if the recommended combination of lead 

 arsenate, lime-sulfur and nicotine sulfate is used. This bulletin contains 

 the record of these studies, carried out both in the laboratory and in the 

 orchard. 



Requests for bulletins should be addressed to 



AGRICULTURAL EXPERIMENT STATION, 

 AMHERST, MASS. 



