Neonicotinoids are a relatively new class of insecticides that have high toxicity to bees. Certain countries in Europe have banned treating seeds with neonicotinoids. PRI is using California’s Pesticide Use Reporting data to help beekeepers learn where neonicotiniods have historically been applied. We are currently developing tools that will allow beekeepers to see what bee-toxic pesticides are being applied each month. For more information, see our Pesticide Use Maps page.
The sample map below shows the areas of California that had the highest amount of neonicotinoid use in 2010. The number of pounds is aggregated for each survey township, which is usually a square piece of land six miles on each side. Orange townships are in the 75th to 95th percentiles and have 268 – 1,250 pounds of neonicotinoids applied per township in 2010. Red townships are above the 95th percentile and have over 1,250 pounds of neonicotinoids applied per township in 2010.