Abstract
Aerial applications of 1¼pounds of Sevin® (1-naphthyl Nmethylcarbamate) per acre were made on 73,610 acres in two counties in New York State between May 21 and June 10, 1959, Twenty-one colonies of honey bees were placed in five locations within the treated area, Five check colonies were placed 3; miles outside of the treated area. Gary traps were placed 011 all colonies. During the spray and postspray period of 47 days treated colonies lost a mean of 19,917 bees while check colonies lost a mean of 2,936 bees, Mortalities were above normal for up to tl weeks following the insecticide applications. Colony recovery was rapid. Some cases of European foul brood resulted from weakening of the colonies.

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