By David Suzuki

The Canadian government is banning plastic microbeads in toiletries. Although designed to clean us, they害羞草研究所檙e polluting the environment, putting the health of fish, wildlife and people at risk. Manufacturers and consumers ushered plastic microbeads into the marketplace, but when we learned of their dangers, we moved to phase them out.

Why, then, is it taking so long to phase out the world害羞草研究所檚 most widely used insecticides, neonicotinoids? Scientists have proven they害羞草研究所檙e harming not only the pests they害羞草研究所檙e designed to kill, but also a long list of non-target species, including pollinators we rely on globally for about one-third of food crops.

Neonics are systemic pesticides. Plants absorb and integrate them into all tissues 害羞草研究所� roots, stems, leaves, flowers, pollen and nectar. First introduced in the 1990s, they now account for one-third of the global pesticide market. Agricultural applications include leaf sprays, and seed and soil treatments. They害羞草研究所檙e also used for trees, turf products, and flea and tick treatments for pets.

We害羞草研究所檝e known about neonics害羞草研究所� harmful impacts on pollinators and ecosystems for years, but this summer, two major scientific releases added significantly to the ever-growing body of research proving widespread use of these toxic chemicals must stop.

On Sept. 18, the Task Force on Systemic Pesticides 害羞草研究所� an international group of independent scientists convened by the International Union for Conservation of Nature 害羞草研究所� released an update to its 2015 Worldwide Integrated Assessment of the Impact of Systemic Pesticides on Biodiversity and Ecosystems. The 2017 update takes into account more than 500 additional peer-reviewed studies, revealing broader impacts and reinforcing the 2015 conclusions that neonics represent a major worldwide threat to biodiversity, ecosystems and the services nature provides.

On Oct. 6, task force scientist Edward Mitchell and an interdisciplinary team from the University of Neuch芒tel and the Botanical Garden in Neuch芒tel, Switzerland, published a study in Science, which found three-quarters of the honey produced throughout the world contains neonics. Although concentrations were below the maximum authorized for human consumption, they surpassed levels proven to affect bees害羞草研究所� behaviour, physiology and reproductive abilities.

Conducted in 2015 and 2016, the study analyzed 198 honey samples from around the world, searching for the five most common neonics: Acetamiprid, clothianidin, imidacloprid, thiacloprid and thiamethoxam. Seventy-five per cent contained at least one, with proportions varying considerably by region. The highest levels were in North America (86 per cent), Asia (80 per cent) and Europe (79 per cent), with the lowest in South America (57 per cent).

Thirty per cent of all samples contained a single neonicotinoid, 45 per cent contained between two and five and 10 per cent contained four or five. Regulators don害羞草研究所檛 tend to consider the 害羞草研究所渃ocktail effects害羞草研究所� of contamination by multiple neonics. The impacts on bees, humans and other organisms are still undiscovered, but I bet they won害羞草研究所檛 be good.

These new findings restate the need to stop all mass-scale systemic pesticide use. Maintaining the status quo means continuing environmentally unsustainable agricultural practices. After all, the latest science also shows that in many cases, neonics provide little or no real benefit to agricultural production. Instead, they decrease soil quality, hurt biodiversity and contaminate water, air and food. They can害羞草研究所檛 even be relied on to decrease farmers害羞草研究所� financial risk or assist significantly with crop yields.

What are governments doing with this information?

In 2013, the European Union imposed a moratorium on certain uses of three neonics on bee-attractive crops: Imidacloprid, clothianidin and thiamethoxam. The EU is now considering extending the moratorium. Meanwhile, the new French biodiversity law aims to ban all neonics starting in Sept. 2018. North American regulators, meanwhile, have failed to recognize the urgent need to prevent neonics from further contaminating the environment.

Health Canada害羞草研究所檚 Pesticide Management Regulatory Agency has proposed phasing out one neonic, imidacloprid, but not until 2021 at the earliest 害羞草研究所� possibly as late as 2023. While industry continues to lobby Ottawa to continue using the toxic chemicals, environmental groups are calling for faster phase-out plans and an end to neonic use.

If we care about the quality and security of our food sources 害羞草研究所� and the species and ecosystems they rely on 害羞草研究所� the time for neonics is over. Sustainable and affordable agricultural and pest management practices exist. It害羞草研究所檚 time to ban bee-killing pesticides.

David Suzuki is a scientist, broadcaster, author and co-founder of the David Suzuki Foundation. Written with contributions from David Suzuki Foundation Communications Manager Brendan Glauser.

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