THE POISONING OF BEES BY ORCHARD SPRAYS 



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Figure 2. Daily Mortality of Honey Bees in Relation to Experimental Sprays, 1926. 



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rise of the 25th may have been influenced by the spray, the effect was so 

 slight as to raise some question. The peak of the 28th so closely matches 

 the rise of daily temperature, and besides was so little higher than some 

 other figures reached when no spray was involved, that but little signifi- 

 cance can be given it. 



The high point reached on the 18th was so abrupt, so close to the lead 

 arsenate spray and represented so great a kill, it must be given some con- 

 sideration and was the only mortality of any real significance. 



