Bees are disappearing from their hives in mass numbers, and there’s no clear explanation of why. Many believe that bees are a barometer of the health of the planet, and colony collapse disorder is raising questions about pesticides, genetically modified crops, monocultures, and mechanization of beekeeping. Taggart Siegel, director, and Jon Betz, producer, of the documentary “Queen of the Sun” tell us why honeybees are important to human life and agriculture, and the factors that are most likely leading to colony collapse and honeybee death on a grand scale in the United States and in Europe. In addition, they explain how some devoted beekeepers are trying to save them. “Queen of the Sun” opens at Cinema Village June 10.