A top US manufacturer of lawn and garden pesticides said it plans to eliminate products containing the neonicotinoid class of chemicals, the use of which has been linked to a massive decline in honeybee population.
— Allison Aubrey (@AubreyNPRFood) April 12, 2016
In an announcement on Tuesday, Ortho, a division of Scotts Miracle-Gro Company, said that it will cease the use of neonicotinoid (“neonic”) ingredients imidacloprid, clothianidin and dinotefuran by 2017, while phasing out neonics in eight products that are used to kill garden pests by the year 2021.
Tim Martin, Ortho’s vice president and general manager, said the company will also begin a “multi-year partnership” with pollinator advocacy organizations to “to promote pollinator habitat” and “homeowner education” initiatives to encourage “responsible use of pesticides where pollinators can be found.”
“This decision comes after careful consideration regarding the range of possible threats to honey bees and other pollinators,” Martin said in a statement. “While agencies in the United States are still evaluating the overall impact of neonics on pollinator populations, it’s time for Ortho to move on.”
Martin added that the change may require gardeners to apply Ortho products more frequently than is currently recommended, and that the cost of products will not change significantly.
Neonics attack the central nervous systems of insects, causing tremors, paralysis, and death. The insecticide is absorbed into treated plants and distributed in their vascular systems, rendering various parts – including the roots, leaves, stem, flowers, nectar, pollen and guttation fluid – toxic to insects.
Neonics like imidacloprid were developed in the 1990s to boost yields of staple crops such as corn, but they are also widely used on annual and perennial plants in lawns and gardens. Researchers believe the neonics are causing some kind of biological reaction in bees that has been blamed for Colony Collapse Disorder (CCD), the disease killing off honeybees and threatening pollination of the world’s crops.
While regulatory agencies in the US are still assessing the impact of neonics on bee populations, the US Environmental Protection Agency (EPA) has said imidacloprid can be a threat to various bees and other pollinators.
Groups wary of pesticide use refer to current research blaming the cause of CCD on two major types of neonics, including imidacloprid. Another study found that bees exposed to “field-realistic” doses of neonics gather less than half the pollen that they normally do, causing starvation among their young.
Environmentalists are calling on the EPA to join the European Commission in adopting a moratorium on such insecticides. In 2013, The EC instituted a two-year moratorium on the use of three neonic pesticides, including imidacloprid.
In 2015, the EPA proposed a prohibition on the use of pesticides that are toxic to bees – including neonics – when crops are in bloom, and temporarily halted the approval of new outdoor neonic uses until new bee data is submitted and pollinator risk assessments are complete.
In March, the US Fish and Wildlife Service said it will consider protecting two species of wild bumblebees under the Endangered Species Act.
Meanwhile, major neonic producers like Bayer CropScience and Syngenta have said that claims of neonic effects on bee populations were exaggerated.