Three quarters of the world's crops depend on pollinators like honeybees, according to the UN Food and Agriculture Organization. They are critical to our food security.
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Honeybees pollinate about 130 types of fruits, vegetables and nuts. According to the USDA, they are the primary commercial pollinators in the US.
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Honeybees are extremely efficient pollinators, according to Samuel Ramsey, professor of entomology at UC Boulder's Bio Frontiers Institute. They have "flower fidelity" -- only pollinating one kind of a flower on each trip outside the hive -- which maximizes pollination and crop yield, he says.
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The USDA estimates that honeybees pollinate $15 billion worth of crops every year in the US alone, and says they are particularly important in the pollination of almonds, avocados and apples.
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Honeybees produce six hive products: honey, pollen, royal jelly, beeswax, propolis, and venom.
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Ramsey says one hive can contain 20,000 to 60,000 bees that work together to build, protect and care for a colony.
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Bees are experiencing what Ramsey calls a "pollinator pandemic," and have been experiencing high loss since 1987, when Varroa mites were first discovered in North America.
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"Every single year we lose between 33% and 51% of our honeybee population (in the US)," says Ramsey.
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"Honeybee declines are the result of the three P's: parasites, pesticides and poor nutrition," Ramsey tells CNN. Of the three, he says that parasites -- like the Varroa destructor, pictured here -- are the biggest problem.
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Naturally-occurring miticides like thymol, oxalic acid and formic acid, as well as harsher synthetic aides, are among some of the current treatments to get rid of varroa mites.