The world is seemingly going to the rats, as the U.K. is currently facing a significant infestation of rodents. But Britain isn't the only place dealing with rat issues, as several thousand miles away California farmers are trying to fight off an infestation that's causing significant problems for the almond industry.
This influx of rats could devastate not only the almond supply in the U.S. but globally. California is responsible for 80% of the world's almond supply, according to the USDA, so producers are trying to stop the rats before they get out of control.
What's happening? Almond growers are "facing an unprecedented challenge this season as a severe roof rat infestation" affects portions of California's Central Valley, said the Almond Board of California. The rats are likely "using irrigation canals and other waterways as corridors, enabling them to rapidly spread between orchards and diverse agricultural fields."
These roof rats, commonly called black rats or house rats, are "arboreal, meaning they spend a considerable amount of their life above ground, often building nests in trees," said the Almond Board. But over the last several years, researchers have noted that "in almonds and other tree nuts, they use burrows extensively."
There's "no clear-cut explanation for why rats on a large scale" have suddenly "developed a taste for nut trees," said USA Today. But it could decimate the almond industry, as the infestation has already "impacted more than 100,000 acres and caused $109 million to $311 million in losses from damage to equipment and crops over a year." And the rats just keep coming. At least one almond grower has been "exterminating between 50 to 100 rats a day," said the Almond Board.
How are farmers fighting back? They are "using bait stations and aluminum phosphide treatments in burrows" in the winter and, during non-winter months, are "turning to snap traps, owl boxes and fumigating the rats by applying carbon monoxide" into rat burrows, said the Los Angeles Times. But these methods are often labor-intensive and expensive and may not be enough.
"We have never seen anything like this," said Roger Isom, the chief executive at the Western Tree Nut Association, to USA Today. "I have had growers who have lost more than half their yield." |