Neonicotinoids

SAN MATEO — According to the United States Department of Agriculture, National Agricultural Statistics Service, the number of honeybees declined by 60 percent since 1947. Over the last decade, some environmental activists and scientists pointed to the negative effects of neonicotinoid pesticides as potential reasons for the declines in honeybee colonies. But some members of the San Mateo beekeeper’s guild are citing other explanations