It's often said that we have bees to thank for one out of every three bites we take of food. In addition to producing honey, honeybees literally criss-cross the United States, pollinating almonds, oranges, melons, blueberries, pumpkins, apples, and more. And while carrots are a biennial root crop that are harvested long before they flower, all carrots are planted from seed, and honeybees pollinate the carrot flowers that produce the seeds. Other species of bees, both social and solitary bees, pollinate other crops. And the populations of all these species of bees are in decline.
The decline of bees has been in the headlines for several years, and theories to explain their deaths abound. But perhaps there is not just one single cause. University of California San Diego professor of biology James Nieh studies foraging, communication and health of bees. "I would say it's a combination of four factors; pesticides, disease, parasites, and human mismanagement," says Nieh. Bees might be weakened by having a very low level of exposure to insecticides or fungicides, making them more susceptible if they are attacked by viruses or parasites. "It's kind of like taking a patient who is not doing so well -- very weak, poor diet, exposing them to pathogens, and then throwing more things at them. It's not surprising that honeybees are not very healthy."...read more>>>...
