A new study has traced the spread of bee diseases across the United States, identifying the role of commercial farmland and managed bees. Led by researchers at the University of California, Berkeley, the study found that commercial farmland is the most significant driver of bee disease spread, followed by managed bees. The findings suggest that changes to agricultural practices can help reduce the spread of deadly diseases that threaten bee populations.

The researchers used data from the United States Department of Agriculture (USDA) to track the spread of bee diseases over the past 15 years. They found that the number of bee colonies infected with diseases such as Nosema ceranae and Varroa destructor had increased during that period. The study also revealed that the highest rates of disease spread were in areas with large amounts of commercial farmland, such as the Midwest and the West Coast.

The researchers say that the study highlights the role of commercial agriculture in the spread of bee diseases. They argue that changes to agricultural practices, such as reducing the use of pesticides and herbicides, can help create healthier environments for bees. They also suggest that managed bees should be better managed to reduce the risk of disease spread, such as ensuring they are regularly inspected for diseases.

The study is the first to trace the spread of bee diseases across the United States and identify the role of commercial farmland and managed bees. The findings have important implications for beekeepers and policymakers, as they can help inform strategies to reduce the spread of bee diseases.