New tests find bee-killing pesticides in 51% of 'bee-friendly' plants from garden centers across U.S. and Canada

Metro Detroit plants found to contain the hazardous pesticide

Many “bee-friendly” home garden plants sold at Home Depot, Lowe’s, and Walmart have been pre-treated with pesticides shown to harm and kill bees, according to a study released today by Friends of the Earth and allies, including the Ecology Center. The study can be downloaded at BeeAction.org. 

The study, Gardeners Beware 2014, shows that 36 out of 71 (51 percent) of garden plant samples purchased at top garden retailers in 18 cities in the United States and Canada contain neonicotinoid (neonic) pesticides -- a key contributor to recent bee declines. 50% of the plants purchased in metro Detroit contained neonic pesticides.

Some of the flowers contained neonic levels high enough to kill bees outright assuming comparable concentrations are present in the flowers' pollen and nectar. Further, 40% of the positive samples contained two or more neonics. The study is a larger follow-up to a first-of-its-kind pilot study released by Friends of the Earth last August. The new study expanded the number of samples and number of locations where plants were purchased, and also assessed the distribution of neonic pesticides between flowers and the rest of the plant.

“The high percentage of contaminated plants and their neonicotinoid concentrations indicate that many gardens with ‘bee-friendly plants’ may actually be harming bees,” said Melissa Sargent of the Ecology Center. “We are calling on retailers to get neonicotinoid pesticides out of their plants and off their shelves. Until then, gardeners should buy organic plants to ensure the safety of bees.”

“Our data indicate that many plants sold in nurseries and garden stores across the U.S. and Canada are being pre-treated with systemic neonicotinoid insecticides, making them potentially toxic to pollinators,” said Timothy Brown, Ph.D., co-author of the report from the Pesticide Research Institute. “Unfortunately, these pesticides don’t break down quickly so these flowers could be toxic to bees for years to come.”

Bees and other pollinators, essential for the two-thirds of the food crops humans eat every day, are in decline in countries around the world. The European Union banned the three most widely used neonicotinoids, based on strong science indicating that neonics can kill bees outright and make them more vulnerable to pests, pathogens, and other stressors. Neonicotinoid insecticides have been responsible for several high profile bee kills from high doses of the pesticides, but a strong and growing body of science shows that neonics contribute to impairment in reproduction, learning and memory, hive communications and immune response at doses far below those that cause bee kills. In this study, all of the nursery plant samples where neonics were detected have the potential to harm or even kill bees.

More than half a million Americans have signed petitions demanding that Lowe’s and Home Depot stop selling neonics. In the face of mounting evidence and growing consumer demand, nearly a dozen nurseries, landscaping companies, and retailers, including BJ's Wholesale Club with more than 200 locations in 15 states, are taking steps to eliminate bee-harming pesticides from their garden plants and their stores.

“A growing number of responsible retailers have decided to be part of the solution to the bee crisis and are taking bee-harming pesticides off their shelves,” said Lisa Archer, director of the Food & technology program at Friends of the Earth-U.S. “We urge Home Depot, Lowe’s and other major retailers to join these leaders in making our backyards and communities safe havens for bees.”

A majority of the UK’s largest garden retailers, including Homebase, B&Q and Wickes, have already voluntarily stopped selling neonics. In addition to pressuring retailers, U.S. groups are calling for the government to restrict neonics in the United States as they have in the EU. Despite more than a million public comments urging swift protections for bees, the EPA has delayed taking substantive action on neonicotinoids until registration review is complete.

In 2013, U.S Representatives Earl Blumenauer (D-Ore.) and John Conyers (D-Mich.) introduced the “Saving America’s Pollinators Act” which seeks to suspend the use of neonics on bee-attractive plants until EPA reviews all available data, including field studies. This bill has bi-partisan support and 65 cosponsors.

 

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For more information, contact: Melissa Sargent at the Ecology Center, melissas@ecocenter.org

Published on June 25, 2014