Joan T. of Santa Rosa asks: I was at a nursery the other day, and I had a rose fertilizer/systemic product in my cart. As I was walking through the nursery, a woman approached and asked me if I knew anything about the product, such as what it affects bees and other beneficial insects. I was puzzled and said I did not. After she told me about the concerns with this product, I was surprised, and put it back.
Can you please tell us what certain insecticides do to our bees and beneficial insects and what we should avoid buying?
Neonicotinoids are a group of insecticides that have been, and are being used by gardeners, farmers and professional landscapers. They are supposed to protect plants from sap-sucking and leaf-chewing insects. Neonicotinoids are systemic, which means they are absorbed by the plant, and are spread throughout all parts of the plant, including the nectar and pollen.
Unfortunately, bees, butterflies, and other flower-visiting insects are harmed by them and have been identified as a factor in overall pollinator declines. These systemic insecticides cause entire plants, including pollen and fruit, to become toxic to pollinators. They also are slow to break down in the environment. A large and growing body of independent science links neonicotinoids to catastrophic bee declines.
What is extremely alarming is that these products are readily available at garden centers and nurseries and sold to the home gardener, although the state of California’s Department of Pesticide Regulation has imposed a freeze on any new applications for products containing neonicotinoids while the issue is under study. The moratorium comes just as the U.S. Environmental Protection Agency under the Trump administration, began considering dramatically expanding use of the highly toxic neonicotinoid thiamethoxam on more than 165 million acres of farmland in the United States.
Before purchasing plants, ask your local nursery or garden center if they have been treated with neonicotinoids. You can also check the label for information about how the plant has been treated.
Read more for a list of products containing Neonicotinoids that you might see at nurseries and garden centers: http://www.pressdemocrat.com/lifestyle/7932506-181/garden-docs-insecticides-that-are