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prevalence of nosema and virus in honey bee (apis mellifera l.) colonies on flowering period of acacia in korea.honey production from approximately 1.6 million colonies owned by about 199,000 korean beekeepers was almost 23,000 metric tons in 2009. nosema causes significant losses in honey production and the virus decreases population size. we initiated a survey of honey bee colonies on the blooming period of acacia to determine the prevalence of nosema and virus in 2011. most korean beekeepers have moved from the south to north of korea to get acacia nectar for 2 mon. this provided a valuable opportunity ...201122783125
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