Over the past decade, beekeepers in the U.S. and other countries have had problems keeping their bees healthy. Some of the potential causes of their problems include the Varroa destructor mite, pesticides, pathogens and the reduction of floral resources due to land development or conversion.
To make matters worse, there has been a lack of useful, long-term data sets on the size of honeybee populations, which makes it difficult to quantify actual changes in honeybee abundance and to
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