The effect of Acarapis woodi on Honeybees from North America

SUMMARYOf 19 colonies infested with Acarapis woodi in spring 1963, 9 were requeened with queens from North America; 2 of these became severely infested in 1963 and one in 1964. Of the 10 colonies left with English queens, one became severely infested in 1964. Infestation declined or remained slight in all the remaining colonies. A. woodi spread quickest in late summer in American bees, as it does in English ones. Severely infested colonies of both American and English bees appeared normal until their death in late winter.