One of America’s earliest food crops – almonds – is also one of the most important for commercial beekeepers. Almonds depend on bees for pollination, but the explosive growth of this bumper crop taxes the very honeybees the industry needs to thrive.
California’s Central Valley produces over 80% of the world’s almonds, valued at over $4 billion in 2012. The boom is poised to continue, with new food products and expanding overseas markets increasing demand to the point that no young almond trees are available for purchase until 2016.
Demand for almonds translates into demand for pollination. So every year commercial beekeepers transport some 60% of all US honeybees to California’s almond groves in February and March, when it’s still winter in most other states. It’s one of their biggest challenges.
For one thing, bee colonies, especially those from northern states, lack sufficient time to emerge from their heat-conserving winter clusters. Some beekeepers thus maintain 20,000 to 30,000 hives. Each one requires careful inspection for diseases and parasites – a meticulous, Herculean task on such a scale.
Complicating the situation, beekeepers are trying to work within a large-scale agricultural system, using an insect whose husbandry practices have changed little since the nineteenth century. The larger the commercial beekeeper’s stock, the harder it can be to tend them and recover from financial setbacks in the form of lost bees.
Almond growers will need 1.5 million hives this year, estimates Colorado beekeeper Lyle Johnston. “It takes almost all the commercial bees in the United States,” to pollinate the almond crop, he says. The payoff can amount to half an individual keeper’s yearly profit.
However, bees can come back from California “loaded with mites and every other disease you can think of,” beekeeper Ed Colby explains. That can often mean bee colony deaths. Last year, US beekeepers experienced an average 30% overwinter bee loss; some lost 10% to 15% of their hives, while others lost much more. It’s a normal cost of doing business, but it can be painful.
Last year’s rate was higher than normal, and higher than any keeper would want. But it was not the “bee-pocalypse” that some news stories claimed. The real story is that efforts to identify a single unifying cause for higher-than-usual losses have failed. Scientists are discovering that multiple issues affect bee health.
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